外语
单选题All of the following are true about sugar EXCEPT ______.A Refined sugar alone can be a diet for people to live on for a few daysB Sugar can cause diabetes, cancer and heart diseasesC Unrefined sugar was once good and very cheap if used to feed and fatt
题目
Refined sugar alone can be a diet for people to live on for a few days
Sugar can cause diabetes, cancer and heart diseases
Unrefined sugar was once good and very cheap if used to feed and fatten livestock
Sugar cannot be used as a daily diet
相似问题和答案
第1题：
People gave ( ) to each other as gifts.
A. eggs
B. money
C. cakes
D. sugar
第2题：
Symptoms of sugar diabetes include ______.
A.increased appetite and thirst
B.decreased appetite and thirst
C.gain in weight
D.elevated temperature
糖尿病的症状包括增加食欲和饥渴
第3题：
A、whether
B、when
C、how
D、what
第4题：
第二篇
Diabetes（糖尿病）and Eye Damage
Over 2 million Canadians have diabetes.It is the leading cause of blindness in North
Americans under 65 years of age.Diabetes is a condition where the body either cannot
produce enough insulin（胰岛素）or cannot respond properly to insulin. Insulin is important
because it moves glucose（葡萄糖）,a simple sugar, into the body's cells from the blood.
The food people eat provides the body with glucose,which is used by the cells as a source
of energy.If insulin isn't available or doesn't work correctly to move glucose from the blood
into the cells,glucose will stay in the blood,leading to high blood sugar levels.
High blood sugar levels damage the blood vessels,including the tiny blood vessels in
the eye．This leads to an eye disease known as diabetic retinopathy（糖尿病型视网膜病）.
The retina（视网膜）is an area at the back of the eye that changes light into nerve signals.
With diabetic retinopathy,some blood vessels in the retina are lost,and some of the other
blood vessels begin to"leak"blood.This causes the retina to swell,and gradually cuts off
its supply of oxygen and nutrients（滋养物）.Eventually , the retina starts to grow new
blood vessels to replace the damaged ones.Unfortunately,these new vessels are not as
strong as the old ones.They are more likely to break,causing bleeding in the eye.
At first,people with diabetic retinopathy will not notice any symptoms.As the disease
gets worse , they may notice blurred（模糊的）vision, black spots or flashing lights. As
time goes on,it can progress to blindness.Everyone with diabetes is at risk for diabetic
retinopathy,and the risk increases the longer you've had diabetes.
Fortunately,you can reduce your risk.If you do not have diabetes,but think you may
be at risk for this condition,visit your doctor to be screened for diabetes.If you do have
diabetes:
Have frequent eye check-ups.
Make sure that you monitor your blood sugar frequently and use your medications as
recommended by your doctor. There is evidence to show that keeping your blood sugar
under tight control can slow down eye damage.
If you have high blood pressure,follow your recommended diet and medications to
keep it under control.If you are not sure whether you have high blood pressure,or whether
your blood pressure is under control,discuss this with your doctor.
A: the nerve's.
B:the blood's.
C:the eye's.
D: the retina's,
第5题：
A. lead to
B. bring in
C. carry on
D. show up
第6题：
No Sweet Talk About Sugar
Sugar's proponents call it quick energy, opponents say it's empty calories (卡路里) 。 But to the average person, who consumes a quarter of a pound of it each day, sugar is mostly an irresistibly good taste.In fact, people seem to have an innate "sweet tooth."
Human societies have long equated sweetness with goodness - sweet mystery of life, sweet smell of success, sweetheart - and that enhances (增强;提高) the attraction.But in recent years, sugar has also been singled out as a potential enemy of the healthy life.Cited for such evils as distracting youngsters from more nutritious (营养的) foodstuffs, enhancing obesity (肥胖), ruining teeth and causing diabetes(糖尿病), it has become the most maligned (恶毒的) of the main components of our diet.
Sugar, like starch, is a carbohydrate (碳水化合物).Its many types include sucrose (table sugar refined from sugarcane or beets), lactose (milk sugar), fructose (fruit sugar), glucose (blood sugar), dextrose (右旋糖), maltose(麦芽糖) and galactose (半乳糖).Seventy percent of the sugar in the labels on all the packaged products in your pantry (食品室) and see how many list sugar (or corn syrup) as a main ingredient (成分) 。
Early this century, the average North American consumed about 76 pounds of refined sugar a year, but starches formed two thirds of his dietary carbohydrates.Today, per-capita refined sugar consumption hovers around 95 pounds, and all types of sugar represent more than half the carbohydrate calories.But in relying on sucrose-sweetened processed foods as a main carbohydrate source, we may miss the essential nutrients - fiber, vitamins and minerals - found in other carbohydrate foods like fruits, vegetables and breads.
The body has no physiological need for sucrose that cannot be satisfied by other, more nutritious foods.The body can convert starches to sugar, or use the sugar in fruits and vegetables for energy.In fact, nutrition experts say that even the purported (传说的) need for sugar as quick energy is a myth except in a few rare situations, such as a diabetic in insulin shock.During exercise, the body calls upon its reserve of glycogen (肝糖) (and, if that runs low, fatty acids from the breakdown of triglycerides) to supply the muscles with needed energy.If you eat sugar before exercising, your body simply stores it.
As for sugar's reputed adverse (不利的) health effects, the following can be said on the basis of available evidence:
Obesity, Sugar supplies four calories per gram - about the same as protein and less half that of fat.Excess caloric intake, not sugar, causes obesity.But since calories can be highly concentrated in sugar-sweetened foods, you may eat many more calories than you need of such foods before you feel full or even realize how much you consumed.
Tooth decay.Sugar definitely promotes the development of dental caries.Bacteria in the mouth digest (消化) the sugar on tooth surfaces, and produce acid which eats away the enamel (珐琅).It is the time sugar remains on the teeth, rather than the amount eaten, that makes the difference.To reduce the risk of decay, dentists recommend rinsing your mouth or brushing you teeth after consuming anything sweet, and avoiding sweets between meals.
Diabetes.In diabetes, the pancreas (胰腺) fails to produce enough insulin to clear the blood of excess glucose.Thus, diabetics must curb their intake of sweets lest their blood-sugar levels rise dangerously high.But the important factor in diabetes is controlling body weight.
Heart Disease.The theory that sugar is an important factor in heart disease does not have wide support among experts, who say that fats and cholesterol (胆固醇) are the more likely culprits (罪魁祸首).
Some people have a tendency to develop high blood levels of fatty substances called triglycerides, which may promote atherosclerosis (动脉硬化).They are often advised to reduce their sugar intake, but losing weight is more important.Diets free of sucrose can lower abnormally high triglyceride levels, but they have been found to have little or no effect on triglyceride levels that are acceptable in the first place.
1、What does the word "innate" mean?()
A、born with
B、implanted
C、bad
D、healthy
2、Which of the following statements is NOT true?()
A、There are many types of sugar such as sucrose, lactose, fructose, etc.
B、Sugar can cause many health problems such as obesity, tooth decay and diabetes.
C、Sugar is not nutritious because it doesn't contain fiber, vitamin and mineral.
D、Sugar is physiologically needed by the body and can not be substituted by other substance.
3、"Curb their intake of sweets" can also be referred to as()their intake of sweets.
A、increase
B、decrease
C、limit
D、take
4、Based on the ideas presented in the passage we can conclude that ().
A、there is not available evidence to show sugar's bad effects
B、if you eat a lot of sweet food, you may suffer from obesity, because such food contains a lot of calories
C、to limit sugar intake is the most important thing for the atherosclerosis patient
D、most experts believe that sugar can cause heart disease
5、From the passage, we know().
A、sugar eats away the enamel, thus causing tooth decay
B、the cause for diabetes is the excessive intake of sugar
C、fats and cholesterol have nothing to do with heart disease
D、high level triglycerides may increase the chances of atherosclerosis
第7题：
Steve：Can I get you a cup of coffee?
Julia：______
A、I don't take sugar, thank you.
B、You can, please.
C、Thank you for the coffee.
D、That's very nice of you.
第8题：
A. from
B. of
C. about
D. on
第9题：
第二篇
Diabetes（糖尿病）and Eye Damage
Over 2 million Canadians have diabetes.It is the leading cause of blindness in North
Americans under 65 years of age.Diabetes is a condition where the body either cannot
produce enough insulin（胰岛素）or cannot respond properly to insulin. Insulin is important
because it moves glucose（葡萄糖）,a simple sugar, into the body's cells from the blood.
The food people eat provides the body with glucose,which is used by the cells as a source
of energy.If insulin isn't available or doesn't work correctly to move glucose from the blood
into the cells,glucose will stay in the blood,leading to high blood sugar levels.
High blood sugar levels damage the blood vessels,including the tiny blood vessels in
the eye．This leads to an eye disease known as diabetic retinopathy（糖尿病型视网膜病）.
The retina（视网膜）is an area at the back of the eye that changes light into nerve signals.
With diabetic retinopathy,some blood vessels in the retina are lost,and some of the other
blood vessels begin to"leak"blood.This causes the retina to swell,and gradually cuts off
its supply of oxygen and nutrients（滋养物）.Eventually , the retina starts to grow new
blood vessels to replace the damaged ones.Unfortunately,these new vessels are not as
strong as the old ones.They are more likely to break,causing bleeding in the eye.
At first,people with diabetic retinopathy will not notice any symptoms.As the disease
gets worse , they may notice blurred（模糊的）vision, black spots or flashing lights. As
time goes on,it can progress to blindness.Everyone with diabetes is at risk for diabetic
retinopathy,and the risk increases the longer you've had diabetes.
Fortunately,you can reduce your risk.If you do not have diabetes,but think you may
be at risk for this condition,visit your doctor to be screened for diabetes.If you do have
diabetes:
Have frequent eye check-ups.
Make sure that you monitor your blood sugar frequently and use your medications as
recommended by your doctor. There is evidence to show that keeping your blood sugar
under tight control can slow down eye damage.
If you have high blood pressure,follow your recommended diet and medications to
keep it under control.If you are not sure whether you have high blood pressure,or whether
your blood pressure is under control,discuss this with your doctor.
A:are stronger than what they used to be.
B: cannot be properly replaced.
C:are more likely to break than the new ones.
D: may return to normal again.
第10题：
第二篇
Diabetes（糖尿病）and Eye Damage
Over 2 million Canadians have diabetes.It is the leading cause of blindness in North
Americans under 65 years of age.Diabetes is a condition where the body either cannot
produce enough insulin（胰岛素）or cannot respond properly to insulin. Insulin is important
because it moves glucose（葡萄糖）,a simple sugar, into the body's cells from the blood.
The food people eat provides the body with glucose,which is used by the cells as a source
of energy.If insulin isn't available or doesn't work correctly to move glucose from the blood
into the cells,glucose will stay in the blood,leading to high blood sugar levels.
High blood sugar levels damage the blood vessels,including the tiny blood vessels in
the eye．This leads to an eye disease known as diabetic retinopathy（糖尿病型视网膜病）.
The retina（视网膜）is an area at the back of the eye that changes light into nerve signals.
With diabetic retinopathy,some blood vessels in the retina are lost,and some of the other
blood vessels begin to"leak"blood.This causes the retina to swell,and gradually cuts off
its supply of oxygen and nutrients（滋养物）.Eventually , the retina starts to grow new
blood vessels to replace the damaged ones.Unfortunately,these new vessels are not as
strong as the old ones.They are more likely to break,causing bleeding in the eye.
At first,people with diabetic retinopathy will not notice any symptoms.As the disease
gets worse , they may notice blurred（模糊的）vision, black spots or flashing lights. As
time goes on,it can progress to blindness.Everyone with diabetes is at risk for diabetic
retinopathy,and the risk increases the longer you've had diabetes.
Fortunately,you can reduce your risk.If you do not have diabetes,but think you may
be at risk for this condition,visit your doctor to be screened for diabetes.If you do have
diabetes:
Have frequent eye check-ups.
Make sure that you monitor your blood sugar frequently and use your medications as
recommended by your doctor. There is evidence to show that keeping your blood sugar
under tight control can slow down eye damage.
If you have high blood pressure,follow your recommended diet and medications to
keep it under control.If you are not sure whether you have high blood pressure,or whether
your blood pressure is under control,discuss this with your doctor.
A:blurred vision.
B: black spots,
C: blindness.
D: flashing lights.