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相似问题和答案
第1题：
共用题干
第一篇
Immune Functions
The immune system is equal in complexity to the combined intricacies of the brain and nervous system.
The success of the immune system in defending the body relies on a dynamic regulatory communication net-
work consisting of millions and millions of cells.Organized into sets and subsets,these cells pass information
back and forth like clouds of bees flying around a hive（蜂巢）.The result is a sensitive system of checks and
balances that produces an immune response that is prompt,appropriate,effective,and self-limiting.
At the heart of the immune system is the ability to distinguish between self and nonself. When immune
defenders encounter cells or organisms carrying foreign or nonself molecules,the immune troops move quickly
to eliminate the intruders（人侵者）.Virtually every body cell carries distinctive molecules that identify it as
self. The body's immune defenses do not normally attack tissues that carry a self-marker. Rather,immune
cells and other body cells coexist peaceably in a state known as self-tolerance.When a normally functioning
immune system attacks a nonself molecule,the system has the ability to"remember"the specifics of the
foreign body.Upon subsequent encounters with the same species of molecules,the immune system reacts
accordingly. With the possible exception of antibodies（抗体）passed during lactation（授乳期）, this so
called immune system memory is not inherited.Despite the occurrence of a virus in your family,your immune
system must"learn"from experience with the many millions of distinctive nonseif molecules in the sea of
microbes（微生物）in which we live. Learning entails producing the appropriate molecules and cells to match
up with and counteract each nonseif invader.
Any substance capable of triggering an immune response is called an antigen（抗原）.Antigens are not
to be confused with illergens（过敏原）,which are most often harmless substances that provoke the immune
system to set off the inappropriate and harmful response known as allergy.An antigen can be a virus,a bacte-
rium,or even a portion or product of one of these organisms.Tissues or cells from another individual also act
as antigens,because the immune system recognizes transplanted tissues as foreign,it rejects them.The body
will even reject nourishing proteins unless they are first broken down by the digestive system into their
primary,nonantigenic building blocks.An antigen announces its foreignness by means of intricate and charac-
teristic shapes called epitopes（抗原表位）, which protrude（突出）from its surface. Most antigens , even the
simplest microbes,carry several different kinds of epitopes on their surface;some may even carry several
hundreds.Some epitopes will be more effective than others at stimulating an immune response.Only in abnormal
situations does the immune system wrongly identify self as nonself and execute a misdirected immune attack.
第一篇
Immune Functions
The immune system is equal in complexity to the combined intricacies of the brain and nervous system.
The success of the immune system in defending the body relies on a dynamic regulatory communication net-
work consisting of millions and millions of cells.Organized into sets and subsets,these cells pass information
back and forth like clouds of bees flying around a hive（蜂巢）.The result is a sensitive system of checks and
balances that produces an immune response that is prompt,appropriate,effective,and self-limiting.
At the heart of the immune system is the ability to distinguish between self and nonself. When immune
defenders encounter cells or organisms carrying foreign or nonself molecules,the immune troops move quickly
to eliminate the intruders（人侵者）.Virtually every body cell carries distinctive molecules that identify it as
self. The body's immune defenses do not normally attack tissues that carry a self-marker. Rather,immune
cells and other body cells coexist peaceably in a state known as self-tolerance.When a normally functioning
immune system attacks a nonself molecule,the system has the ability to"remember"the specifics of the
foreign body.Upon subsequent encounters with the same species of molecules,the immune system reacts
accordingly. With the possible exception of antibodies（抗体）passed during lactation（授乳期）, this so
called immune system memory is not inherited.Despite the occurrence of a virus in your family,your immune
system must"learn"from experience with the many millions of distinctive nonseif molecules in the sea of
microbes（微生物）in which we live. Learning entails producing the appropriate molecules and cells to match
up with and counteract each nonseif invader.
Any substance capable of triggering an immune response is called an antigen（抗原）.Antigens are not
to be confused with illergens（过敏原）,which are most often harmless substances that provoke the immune
system to set off the inappropriate and harmful response known as allergy.An antigen can be a virus,a bacte-
rium,or even a portion or product of one of these organisms.Tissues or cells from another individual also act
as antigens,because the immune system recognizes transplanted tissues as foreign,it rejects them.The body
will even reject nourishing proteins unless they are first broken down by the digestive system into their
primary,nonantigenic building blocks.An antigen announces its foreignness by means of intricate and charac-
teristic shapes called epitopes（抗原表位）, which protrude（突出）from its surface. Most antigens , even the
simplest microbes,carry several different kinds of epitopes on their surface;some may even carry several
hundreds.Some epitopes will be more effective than others at stimulating an immune response.Only in abnormal
situations does the immune system wrongly identify self as nonself and execute a misdirected immune attack.
The immune cells and other cells in the body coexist peaceably in a state known as________.
A:self-tolerance
B:balance
C:harmony
D:tolerance
A:self-tolerance
B:balance
C:harmony
D:tolerance
答案：A
解析：
由第一段第三句中的“like clouds of bees flying around a hive”可知选B。
由文章第二段第五句可知答案为A。
由文章最后一段中的“An antigen announces its foreignness by …characteristic shapes …" 可知选C。
由文章最后一段第一句可知，能引起免疫反应的物质叫抗原，即抗原能引起免疫反应， 故选B
由文章第二段第一句“At the heart of the immune system...”可知选D。 heart相当 于basic。
由文章第二段第五句可知答案为A。
由文章最后一段中的“An antigen announces its foreignness by …characteristic shapes …" 可知选C。
由文章最后一段第一句可知，能引起免疫反应的物质叫抗原，即抗原能引起免疫反应， 故选B
由文章第二段第一句“At the heart of the immune system...”可知选D。 heart相当 于basic。
第2题：
共用题干
第一篇
Immune Functions
The immune system is equal in complexity to the combined intricacies of the brain and nervous system.
The success of the immune system in defending the body relies on a dynamic regulatory communication net-
work consisting of millions and millions of cells.Organized into sets and subsets,these cells pass information
back and forth like clouds of bees flying around a hive（蜂巢）.The result is a sensitive system of checks and
balances that produces an immune response that is prompt,appropriate,effective,and self-limiting.
At the heart of the immune system is the ability to distinguish between self and nonself. When immune
defenders encounter cells or organisms carrying foreign or nonself molecules,the immune troops move quickly
to eliminate the intruders（人侵者）.Virtually every body cell carries distinctive molecules that identify it as
self. The body's immune defenses do not normally attack tissues that carry a self-marker. Rather,immune
cells and other body cells coexist peaceably in a state known as self-tolerance.When a normally functioning
immune system attacks a nonself molecule,the system has the ability to"remember"the specifics of the
foreign body.Upon subsequent encounters with the same species of molecules,the immune system reacts
accordingly. With the possible exception of antibodies（抗体）passed during lactation（授乳期）, this so
called immune system memory is not inherited.Despite the occurrence of a virus in your family,your immune
system must"learn"from experience with the many millions of distinctive nonseif molecules in the sea of
microbes（微生物）in which we live. Learning entails producing the appropriate molecules and cells to match
up with and counteract each nonseif invader.
Any substance capable of triggering an immune response is called an antigen（抗原）.Antigens are not
to be confused with illergens（过敏原）,which are most often harmless substances that provoke the immune
system to set off the inappropriate and harmful response known as allergy.An antigen can be a virus,a bacte-
rium,or even a portion or product of one of these organisms.Tissues or cells from another individual also act
as antigens,because the immune system recognizes transplanted tissues as foreign,it rejects them.The body
will even reject nourishing proteins unless they are first broken down by the digestive system into their
primary,nonantigenic building blocks.An antigen announces its foreignness by means of intricate and charac-
teristic shapes called epitopes（抗原表位）, which protrude（突出）from its surface. Most antigens , even the
simplest microbes,carry several different kinds of epitopes on their surface;some may even carry several
hundreds.Some epitopes will be more effective than others at stimulating an immune response.Only in abnormal
situations does the immune system wrongly identify self as nonself and execute a misdirected immune attack.
第一篇
Immune Functions
The immune system is equal in complexity to the combined intricacies of the brain and nervous system.
The success of the immune system in defending the body relies on a dynamic regulatory communication net-
work consisting of millions and millions of cells.Organized into sets and subsets,these cells pass information
back and forth like clouds of bees flying around a hive（蜂巢）.The result is a sensitive system of checks and
balances that produces an immune response that is prompt,appropriate,effective,and self-limiting.
At the heart of the immune system is the ability to distinguish between self and nonself. When immune
defenders encounter cells or organisms carrying foreign or nonself molecules,the immune troops move quickly
to eliminate the intruders（人侵者）.Virtually every body cell carries distinctive molecules that identify it as
self. The body's immune defenses do not normally attack tissues that carry a self-marker. Rather,immune
cells and other body cells coexist peaceably in a state known as self-tolerance.When a normally functioning
immune system attacks a nonself molecule,the system has the ability to"remember"the specifics of the
foreign body.Upon subsequent encounters with the same species of molecules,the immune system reacts
accordingly. With the possible exception of antibodies（抗体）passed during lactation（授乳期）, this so
called immune system memory is not inherited.Despite the occurrence of a virus in your family,your immune
system must"learn"from experience with the many millions of distinctive nonseif molecules in the sea of
microbes（微生物）in which we live. Learning entails producing the appropriate molecules and cells to match
up with and counteract each nonseif invader.
Any substance capable of triggering an immune response is called an antigen（抗原）.Antigens are not
to be confused with illergens（过敏原）,which are most often harmless substances that provoke the immune
system to set off the inappropriate and harmful response known as allergy.An antigen can be a virus,a bacte-
rium,or even a portion or product of one of these organisms.Tissues or cells from another individual also act
as antigens,because the immune system recognizes transplanted tissues as foreign,it rejects them.The body
will even reject nourishing proteins unless they are first broken down by the digestive system into their
primary,nonantigenic building blocks.An antigen announces its foreignness by means of intricate and charac-
teristic shapes called epitopes（抗原表位）, which protrude（突出）from its surface. Most antigens , even the
simplest microbes,carry several different kinds of epitopes on their surface;some may even carry several
hundreds.Some epitopes will be more effective than others at stimulating an immune response.Only in abnormal
situations does the immune system wrongly identify self as nonself and execute a misdirected immune attack.
How do the immune cells recognize an antigen as"foreign"or"nonself"?
A:Through an allergic response.
B:Through blood type.
C:Through characteristic shapes on the antigen surface.
D:Through fine hairs protruding from the antigen surface.
A:Through an allergic response.
B:Through blood type.
C:Through characteristic shapes on the antigen surface.
D:Through fine hairs protruding from the antigen surface.
答案：C
解析：
由第一段第三句中的“like clouds of bees flying around a hive”可知选B。
由文章第二段第五句可知答案为A。
由文章最后一段中的“An antigen announces its foreignness by …characteristic shapes …" 可知选C。
由文章最后一段第一句可知，能引起免疫反应的物质叫抗原，即抗原能引起免疫反应， 故选B
由文章第二段第一句“At the heart of the immune system...”可知选D。 heart相当 于basic。
由文章第二段第五句可知答案为A。
由文章最后一段中的“An antigen announces its foreignness by …characteristic shapes …" 可知选C。
由文章最后一段第一句可知，能引起免疫反应的物质叫抗原，即抗原能引起免疫反应， 故选B
由文章第二段第一句“At the heart of the immune system...”可知选D。 heart相当 于basic。
第3题：
下列关于前列腺特异性抗原(prostate－specific antigen,PSA)的说法,不正确的是()
A.血清PSA为组织特异性而非疾病特异性
B.PSA升高对前列腺癌，特别是高分化癌有较高的诊断价值
C.PSA检查应在前列腺的直肠指诊前1周
D.PSA检测时应无急性前列腺炎、尿潴留
E.PSA检查应在膀胱镜检查、导尿等操作后48小时
答案：C
第4题：
抗原（antigen，Ag）
正确答案: 能诱导机体产生体液抗体和细胞免疫应答，并能与抗体和致敏淋巴细胞在体内外发生特异结合反应的物质。
第5题：
共用题干
第二篇
Bone Marrow Transplantation
Bone marrow is the spongy tissue inside some of your bones,such as your hip and thigh bones. It contains immature cells,called stem cells.The stem cells can develop into the red blood cells that carry oxygen through your body,the white blood cells that fight infections,and the platelets that help with blood clotting.
If there is a problem with your bone marrow,a transplant can give you healthy new marrow. You could need a transplant because of a disease,such as bone marrow diseases or cancers like leukemia kemia or lymphoma.Or you might need one if a strong cancer treatment kills your healthy blood cells.
People with cancer sometimes donate bone marrow before treatment to be transplanted later. But often the new marrow comes from a donor,either a close family member or someone unrelated.
The healthy cells for a transplant can come from three sources:bone marrow;peripheral (circulating) blood that has an increased number of healthy blood-forming cells(also called peripheral blood stem cells or PBSC);umbilical cord blood that is collected after a baby is born.
If you need an allogeneic transplant,your doctor will look for a marrow donor or cord blood unit that matches your HLA tissue type.HLA stands for human leukocyte antigen,a markei your immune system uses to recognize which cells belong in your body and which do not.
Before your body can receive the healthy cells,the diseased cells must be destroyed.This is done using chemotherapy and sometimes radiation. The destruction of diseased cells is called a preparative regimen or a conditioning regimen.
On the day of transplant,the cells from the marrow donor or cord blood unit are infused intravenously(go into your body through a large vein).These healthy cells move into the spaces inside your bones where they create new marrow. They grow and make healthy new red blood cells,white blood cells,and platelets.
第二篇
Bone Marrow Transplantation
Bone marrow is the spongy tissue inside some of your bones,such as your hip and thigh bones. It contains immature cells,called stem cells.The stem cells can develop into the red blood cells that carry oxygen through your body,the white blood cells that fight infections,and the platelets that help with blood clotting.
If there is a problem with your bone marrow,a transplant can give you healthy new marrow. You could need a transplant because of a disease,such as bone marrow diseases or cancers like leukemia kemia or lymphoma.Or you might need one if a strong cancer treatment kills your healthy blood cells.
People with cancer sometimes donate bone marrow before treatment to be transplanted later. But often the new marrow comes from a donor,either a close family member or someone unrelated.
The healthy cells for a transplant can come from three sources:bone marrow;peripheral (circulating) blood that has an increased number of healthy blood-forming cells(also called peripheral blood stem cells or PBSC);umbilical cord blood that is collected after a baby is born.
If you need an allogeneic transplant,your doctor will look for a marrow donor or cord blood unit that matches your HLA tissue type.HLA stands for human leukocyte antigen,a markei your immune system uses to recognize which cells belong in your body and which do not.
Before your body can receive the healthy cells,the diseased cells must be destroyed.This is done using chemotherapy and sometimes radiation. The destruction of diseased cells is called a preparative regimen or a conditioning regimen.
On the day of transplant,the cells from the marrow donor or cord blood unit are infused intravenously(go into your body through a large vein).These healthy cells move into the spaces inside your bones where they create new marrow. They grow and make healthy new red blood cells,white blood cells,and platelets.
We can infer from this passage that_________.
A:bone marrow transplantation requires five procedures
B:bone marrow transplantation is complex
C:people with leukemia must need transplantation
D:people with cancer must donate bone marrow before treatment
A:bone marrow transplantation requires five procedures
B:bone marrow transplantation is complex
C:people with leukemia must need transplantation
D:people with cancer must donate bone marrow before treatment
答案：B
解析：
细节题。第三段最后一句：通常新骨髓来源于一个捐献者，或者是血缘亲近的家人，或者是无血缘关系的陌生人。B不全面，C“器官捐献者”，也不正确。
词义推断题。第一段第二句：它包括不成熟的细胞，被称作干细胞。A是 “主要的”,B是“杰出的”,D是“重要的”，只有C是“发育不完全的”。
细节题。由第四段可以看出，A、C、D都是文章提到的，只有B"婴儿的血液”除外。
细节题。倒数第二段提到了生病的细胞一定要被破坏掉，A和B都是破坏的方式，都不全面。C意思不明，且与文义不符。D的意思是被彻底破坏掉。
推断题。A选项文章没有提及。C选项语气过于绝对，文章中没有如此说明。第三段第一句说癌症患者有时会在治疗前捐出骨髓用于日后的移植，D选项说必须，则是不正确的。从文章中可以看出，骨髓移植是很复杂的，因此B选项是可以推断出来的。
词义推断题。第一段第二句：它包括不成熟的细胞，被称作干细胞。A是 “主要的”,B是“杰出的”,D是“重要的”，只有C是“发育不完全的”。
细节题。由第四段可以看出，A、C、D都是文章提到的，只有B"婴儿的血液”除外。
细节题。倒数第二段提到了生病的细胞一定要被破坏掉，A和B都是破坏的方式，都不全面。C意思不明，且与文义不符。D的意思是被彻底破坏掉。
推断题。A选项文章没有提及。C选项语气过于绝对，文章中没有如此说明。第三段第一句说癌症患者有时会在治疗前捐出骨髓用于日后的移植，D选项说必须，则是不正确的。从文章中可以看出，骨髓移植是很复杂的，因此B选项是可以推断出来的。
第6题：
共用题干
第一篇
Immune Functions
The immune system is equal in complexity to the combined intricacies of the brain and nervous system.
The success of the immune system in defending the body relies on a dynamic regulatory communication net-
work consisting of millions and millions of cells.Organized into sets and subsets,these cells pass information
back and forth like clouds of bees flying around a hive（蜂巢）.The result is a sensitive system of checks and
balances that produces an immune response that is prompt,appropriate,effective,and self-limiting.
At the heart of the immune system is the ability to distinguish between self and nonself. When immune
defenders encounter cells or organisms carrying foreign or nonself molecules,the immune troops move quickly
to eliminate the intruders（人侵者）.Virtually every body cell carries distinctive molecules that identify it as
self. The body's immune defenses do not normally attack tissues that carry a self-marker. Rather,immune
cells and other body cells coexist peaceably in a state known as self-tolerance.When a normally functioning
immune system attacks a nonself molecule,the system has the ability to"remember"the specifics of the
foreign body.Upon subsequent encounters with the same species of molecules,the immune system reacts
accordingly. With the possible exception of antibodies（抗体）passed during lactation（授乳期）, this so
called immune system memory is not inherited.Despite the occurrence of a virus in your family,your immune
system must"learn"from experience with the many millions of distinctive nonseif molecules in the sea of
microbes（微生物）in which we live. Learning entails producing the appropriate molecules and cells to match
up with and counteract each nonseif invader.
Any substance capable of triggering an immune response is called an antigen（抗原）.Antigens are not
to be confused with illergens（过敏原）,which are most often harmless substances that provoke the immune
system to set off the inappropriate and harmful response known as allergy.An antigen can be a virus,a bacte-
rium,or even a portion or product of one of these organisms.Tissues or cells from another individual also act
as antigens,because the immune system recognizes transplanted tissues as foreign,it rejects them.The body
will even reject nourishing proteins unless they are first broken down by the digestive system into their
primary,nonantigenic building blocks.An antigen announces its foreignness by means of intricate and charac-
teristic shapes called epitopes（抗原表位）, which protrude（突出）from its surface. Most antigens , even the
simplest microbes,carry several different kinds of epitopes on their surface;some may even carry several
hundreds.Some epitopes will be more effective than others at stimulating an immune response.Only in abnormal
situations does the immune system wrongly identify self as nonself and execute a misdirected immune attack.
第一篇
Immune Functions
The immune system is equal in complexity to the combined intricacies of the brain and nervous system.
The success of the immune system in defending the body relies on a dynamic regulatory communication net-
work consisting of millions and millions of cells.Organized into sets and subsets,these cells pass information
back and forth like clouds of bees flying around a hive（蜂巢）.The result is a sensitive system of checks and
balances that produces an immune response that is prompt,appropriate,effective,and self-limiting.
At the heart of the immune system is the ability to distinguish between self and nonself. When immune
defenders encounter cells or organisms carrying foreign or nonself molecules,the immune troops move quickly
to eliminate the intruders（人侵者）.Virtually every body cell carries distinctive molecules that identify it as
self. The body's immune defenses do not normally attack tissues that carry a self-marker. Rather,immune
cells and other body cells coexist peaceably in a state known as self-tolerance.When a normally functioning
immune system attacks a nonself molecule,the system has the ability to"remember"the specifics of the
foreign body.Upon subsequent encounters with the same species of molecules,the immune system reacts
accordingly. With the possible exception of antibodies（抗体）passed during lactation（授乳期）, this so
called immune system memory is not inherited.Despite the occurrence of a virus in your family,your immune
system must"learn"from experience with the many millions of distinctive nonseif molecules in the sea of
microbes（微生物）in which we live. Learning entails producing the appropriate molecules and cells to match
up with and counteract each nonseif invader.
Any substance capable of triggering an immune response is called an antigen（抗原）.Antigens are not
to be confused with illergens（过敏原）,which are most often harmless substances that provoke the immune
system to set off the inappropriate and harmful response known as allergy.An antigen can be a virus,a bacte-
rium,or even a portion or product of one of these organisms.Tissues or cells from another individual also act
as antigens,because the immune system recognizes transplanted tissues as foreign,it rejects them.The body
will even reject nourishing proteins unless they are first broken down by the digestive system into their
primary,nonantigenic building blocks.An antigen announces its foreignness by means of intricate and charac-
teristic shapes called epitopes（抗原表位）, which protrude（突出）from its surface. Most antigens , even the
simplest microbes,carry several different kinds of epitopes on their surface;some may even carry several
hundreds.Some epitopes will be more effective than others at stimulating an immune response.Only in abnormal
situations does the immune system wrongly identify self as nonself and execute a misdirected immune attack.
Which of the following best expresses the main idea of this passage?
A:An antigen is any substance that triggers an immune response.
B:One of the immune system's primary functions is the allergic response.
C:The human body is an appropriate habitat for microbes.
D:The basic function of the immune system is to distinguish between self and nonseif.
A:An antigen is any substance that triggers an immune response.
B:One of the immune system's primary functions is the allergic response.
C:The human body is an appropriate habitat for microbes.
D:The basic function of the immune system is to distinguish between self and nonseif.
答案：D
解析：
由第一段第三句中的“like clouds of bees flying around a hive”可知选B。
由文章第二段第五句可知答案为A。
由文章最后一段中的“An antigen announces its foreignness by …characteristic shapes …" 可知选C。
由文章最后一段第一句可知，能引起免疫反应的物质叫抗原，即抗原能引起免疫反应， 故选B
由文章第二段第一句“At the heart of the immune system...”可知选D。 heart相当 于basic。
由文章第二段第五句可知答案为A。
由文章最后一段中的“An antigen announces its foreignness by …characteristic shapes …" 可知选C。
由文章最后一段第一句可知，能引起免疫反应的物质叫抗原，即抗原能引起免疫反应， 故选B
由文章第二段第一句“At the heart of the immune system...”可知选D。 heart相当 于basic。
第7题：
共用题干
第二篇
Bone Marrow Transplantation
Bone marrow is the spongy tissue inside some of your bones,such as your hip and thigh bones. It contains immature cells,called stem cells.The stem cells can develop into the red blood cells that carry oxygen through your body,the white blood cells that fight infections,and the platelets that help with blood clotting.
If there is a problem with your bone marrow,a transplant can give you healthy new marrow. You could need a transplant because of a disease,such as bone marrow diseases or cancers like leukemia kemia or lymphoma.Or you might need one if a strong cancer treatment kills your healthy blood cells.
People with cancer sometimes donate bone marrow before treatment to be transplanted later. But often the new marrow comes from a donor,either a close family member or someone unrelated.
The healthy cells for a transplant can come from three sources:bone marrow;peripheral (circulating) blood that has an increased number of healthy blood-forming cells(also called peripheral blood stem cells or PBSC);umbilical cord blood that is collected after a baby is born.
If you need an allogeneic transplant,your doctor will look for a marrow donor or cord blood unit that matches your HLA tissue type.HLA stands for human leukocyte antigen,a markei your immune system uses to recognize which cells belong in your body and which do not.
Before your body can receive the healthy cells,the diseased cells must be destroyed.This is done using chemotherapy and sometimes radiation. The destruction of diseased cells is called a preparative regimen or a conditioning regimen.
On the day of transplant,the cells from the marrow donor or cord blood unit are infused intravenously(go into your body through a large vein).These healthy cells move into the spaces inside your bones where they create new marrow. They grow and make healthy new red blood cells,white blood cells,and platelets.
第二篇
Bone Marrow Transplantation
Bone marrow is the spongy tissue inside some of your bones,such as your hip and thigh bones. It contains immature cells,called stem cells.The stem cells can develop into the red blood cells that carry oxygen through your body,the white blood cells that fight infections,and the platelets that help with blood clotting.
If there is a problem with your bone marrow,a transplant can give you healthy new marrow. You could need a transplant because of a disease,such as bone marrow diseases or cancers like leukemia kemia or lymphoma.Or you might need one if a strong cancer treatment kills your healthy blood cells.
People with cancer sometimes donate bone marrow before treatment to be transplanted later. But often the new marrow comes from a donor,either a close family member or someone unrelated.
The healthy cells for a transplant can come from three sources:bone marrow;peripheral (circulating) blood that has an increased number of healthy blood-forming cells(also called peripheral blood stem cells or PBSC);umbilical cord blood that is collected after a baby is born.
If you need an allogeneic transplant,your doctor will look for a marrow donor or cord blood unit that matches your HLA tissue type.HLA stands for human leukocyte antigen,a markei your immune system uses to recognize which cells belong in your body and which do not.
Before your body can receive the healthy cells,the diseased cells must be destroyed.This is done using chemotherapy and sometimes radiation. The destruction of diseased cells is called a preparative regimen or a conditioning regimen.
On the day of transplant,the cells from the marrow donor or cord blood unit are infused intravenously(go into your body through a large vein).These healthy cells move into the spaces inside your bones where they create new marrow. They grow and make healthy new red blood cells,white blood cells,and platelets.
Before receiving healthy cells,diseased cells must_________.
A:undergo chemotherapy
B:go through radiation
C:be prepared
D:be wrecked
A:undergo chemotherapy
B:go through radiation
C:be prepared
D:be wrecked
答案：D
解析：
细节题。第三段最后一句：通常新骨髓来源于一个捐献者，或者是血缘亲近的家人，或者是无血缘关系的陌生人。B不全面，C“器官捐献者”，也不正确。
词义推断题。第一段第二句：它包括不成熟的细胞，被称作干细胞。A是 “主要的”,B是“杰出的”,D是“重要的”，只有C是“发育不完全的”。
细节题。由第四段可以看出，A、C、D都是文章提到的，只有B"婴儿的血液”除外。
细节题。倒数第二段提到了生病的细胞一定要被破坏掉，A和B都是破坏的方式，都不全面。C意思不明，且与文义不符。D的意思是被彻底破坏掉。
推断题。A选项文章没有提及。C选项语气过于绝对，文章中没有如此说明。第三段第一句说癌症患者有时会在治疗前捐出骨髓用于日后的移植，D选项说必须，则是不正确的。从文章中可以看出，骨髓移植是很复杂的，因此B选项是可以推断出来的。
词义推断题。第一段第二句：它包括不成熟的细胞，被称作干细胞。A是 “主要的”,B是“杰出的”,D是“重要的”，只有C是“发育不完全的”。
细节题。由第四段可以看出，A、C、D都是文章提到的，只有B"婴儿的血液”除外。
细节题。倒数第二段提到了生病的细胞一定要被破坏掉，A和B都是破坏的方式，都不全面。C意思不明，且与文义不符。D的意思是被彻底破坏掉。
推断题。A选项文章没有提及。C选项语气过于绝对，文章中没有如此说明。第三段第一句说癌症患者有时会在治疗前捐出骨髓用于日后的移植，D选项说必须，则是不正确的。从文章中可以看出，骨髓移植是很复杂的，因此B选项是可以推断出来的。
第8题：
共用题干
第一篇
Immune Functions
The immune system is equal in complexity to the combined intricacies of the brain and nervous system.
The success of the immune system in defending the body relies on a dynamic regulatory communication net-
work consisting of millions and millions of cells.Organized into sets and subsets,these cells pass information
back and forth like clouds of bees flying around a hive（蜂巢）.The result is a sensitive system of checks and
balances that produces an immune response that is prompt,appropriate,effective,and self-limiting.
At the heart of the immune system is the ability to distinguish between self and nonself. When immune
defenders encounter cells or organisms carrying foreign or nonself molecules,the immune troops move quickly
to eliminate the intruders（人侵者）.Virtually every body cell carries distinctive molecules that identify it as
self. The body's immune defenses do not normally attack tissues that carry a self-marker. Rather,immune
cells and other body cells coexist peaceably in a state known as self-tolerance.When a normally functioning
immune system attacks a nonself molecule,the system has the ability to"remember"the specifics of the
foreign body.Upon subsequent encounters with the same species of molecules,the immune system reacts
accordingly. With the possible exception of antibodies（抗体）passed during lactation（授乳期）, this so
called immune system memory is not inherited.Despite the occurrence of a virus in your family,your immune
system must"learn"from experience with the many millions of distinctive nonseif molecules in the sea of
microbes（微生物）in which we live. Learning entails producing the appropriate molecules and cells to match
up with and counteract each nonseif invader.
Any substance capable of triggering an immune response is called an antigen（抗原）.Antigens are not
to be confused with illergens（过敏原）,which are most often harmless substances that provoke the immune
system to set off the inappropriate and harmful response known as allergy.An antigen can be a virus,a bacte-
rium,or even a portion or product of one of these organisms.Tissues or cells from another individual also act
as antigens,because the immune system recognizes transplanted tissues as foreign,it rejects them.The body
will even reject nourishing proteins unless they are first broken down by the digestive system into their
primary,nonantigenic building blocks.An antigen announces its foreignness by means of intricate and charac-
teristic shapes called epitopes（抗原表位）, which protrude（突出）from its surface. Most antigens , even the
simplest microbes,carry several different kinds of epitopes on their surface;some may even carry several
hundreds.Some epitopes will be more effective than others at stimulating an immune response.Only in abnormal
situations does the immune system wrongly identify self as nonself and execute a misdirected immune attack.
第一篇
Immune Functions
The immune system is equal in complexity to the combined intricacies of the brain and nervous system.
The success of the immune system in defending the body relies on a dynamic regulatory communication net-
work consisting of millions and millions of cells.Organized into sets and subsets,these cells pass information
back and forth like clouds of bees flying around a hive（蜂巢）.The result is a sensitive system of checks and
balances that produces an immune response that is prompt,appropriate,effective,and self-limiting.
At the heart of the immune system is the ability to distinguish between self and nonself. When immune
defenders encounter cells or organisms carrying foreign or nonself molecules,the immune troops move quickly
to eliminate the intruders（人侵者）.Virtually every body cell carries distinctive molecules that identify it as
self. The body's immune defenses do not normally attack tissues that carry a self-marker. Rather,immune
cells and other body cells coexist peaceably in a state known as self-tolerance.When a normally functioning
immune system attacks a nonself molecule,the system has the ability to"remember"the specifics of the
foreign body.Upon subsequent encounters with the same species of molecules,the immune system reacts
accordingly. With the possible exception of antibodies（抗体）passed during lactation（授乳期）, this so
called immune system memory is not inherited.Despite the occurrence of a virus in your family,your immune
system must"learn"from experience with the many millions of distinctive nonseif molecules in the sea of
microbes（微生物）in which we live. Learning entails producing the appropriate molecules and cells to match
up with and counteract each nonseif invader.
Any substance capable of triggering an immune response is called an antigen（抗原）.Antigens are not
to be confused with illergens（过敏原）,which are most often harmless substances that provoke the immune
system to set off the inappropriate and harmful response known as allergy.An antigen can be a virus,a bacte-
rium,or even a portion or product of one of these organisms.Tissues or cells from another individual also act
as antigens,because the immune system recognizes transplanted tissues as foreign,it rejects them.The body
will even reject nourishing proteins unless they are first broken down by the digestive system into their
primary,nonantigenic building blocks.An antigen announces its foreignness by means of intricate and charac-
teristic shapes called epitopes（抗原表位）, which protrude（突出）from its surface. Most antigens , even the
simplest microbes,carry several different kinds of epitopes on their surface;some may even carry several
hundreds.Some epitopes will be more effective than others at stimulating an immune response.Only in abnormal
situations does the immune system wrongly identify self as nonself and execute a misdirected immune attack.
What is used to describe the communication network consisting of cells in the immune system?
A:The immune system's memory.
B:Immune troops sliminating intruders.
C:Bees flying around a hive.
D:A sea of microbes.
A:The immune system's memory.
B:Immune troops sliminating intruders.
C:Bees flying around a hive.
D:A sea of microbes.
答案：C
解析：
由第一段第三句中的“like clouds of bees flying around a hive”可知选B。
由文章第二段第五句可知答案为A。
由文章最后一段中的“An antigen announces its foreignness by …characteristic shapes …" 可知选C。
由文章最后一段第一句可知，能引起免疫反应的物质叫抗原，即抗原能引起免疫反应， 故选B
由文章第二段第一句“At the heart of the immune system...”可知选D。 heart相当 于basic。
由文章第二段第五句可知答案为A。
由文章最后一段中的“An antigen announces its foreignness by …characteristic shapes …" 可知选C。
由文章最后一段第一句可知，能引起免疫反应的物质叫抗原，即抗原能引起免疫反应， 故选B
由文章第二段第一句“At the heart of the immune system...”可知选D。 heart相当 于basic。
第9题：
细胞毒T淋巴细胞抗原-4(cytotoxic T lymphocyte antigen-4，CTLA-4)
正确答案: 细胞毒T淋巴细胞抗原-4(cytotoxic T lymphocyte antigen-4，CTLA-4)又称为CD152，为同源二聚体，表达于活化的T细胞上，其胞浆区可与磷酸酶(SHP-1、SHIP)结合，对T细胞具有负调节作用。它和CD28分子均能与CD80/CD86结合，共同调节免疫应答。
第10题：
抗原提呈（antigen present）
正确答案:是指抗原提呈细胞将抗原加工、降解为多肽片段，并与MHC分子结合为抗原肽-MHC分子复合物，而转移至细胞表面，再与TCR结合形成TCR-抗原肽-MHC分子三元体，提呈给T淋巴细胞的全过程。