海船船员考试
单选题When two different metals are joined to form a closed circuit and exposed to different temperatures at their junctions （） which can be used to measure temperature.A a current will flowB a power will developC a heat will flowD a pressure will produce
题目
a current will flow
a power will develop
a heat will flow
a pressure will produce
相似问题和答案
第1题：
A. An Adjacency is formed.
B. No IS-IS PDUs are sent.
C. An Adjacency does not form.
D. An Adjacency forms but traffic is not forwarded.
第2题：
Two Level 1 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）
- A、An Adjacency is formed.
- B、No IS-IS PDUs are sent
- C、An Adjacency does not form.
- D、An Adjacency forms but traffic is not forwarded.
正确答案:C
第3题：
A.extend
B.enlarge
C.spread
D.expand
第4题：
What are two steps that are taken when a router converts a voice signal from analog to digital form？（）
- A、sampling
- B、packetization
- C、quantization
- D、serialization
正确答案:A,C
第5题：
A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）
- A、Two switch ports will be needed on a switch,two Ethernet cables will be needed for theserver each connecting to two different Ethernet cards,and one IP address will be needed
- B、Two switch ports will be needed on two different switches two Ethernet cables will beneeded for the server each connecting to two different Ethernet cards,and one IP address will be needed
- C、Two switch ports will be needed on two different switches,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,two different IP addresses will be needed
- D、One switch port will be needed on one switch,a splitter will be needed to split the connection,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,and two different IP addresses will be needed
正确答案:B
第6题：
A.The loopback addresses are on different subnets
B.The value of the dead timers on the router are different
C.Route summarization is enabled on both routers
D.The process indentifier on router A is different than the process identifier on router B
第7题：
In which two cases would you use an outer join? （）
- A、The tables being joined have NOT NULL columns.
- B、The tables being joined have only matched data.
- C、The columns being joined have NULL values.
- D、The tables being joined have only unmatched data.
- E、The tables being joined have both matched and unmatched data.
- F、Only when the tables have a primary key-foreign key relationship.
正确答案:C,E
第8题：
当关闭窗体(Form1)或执行Unload语句时所能触发的事件是
A．Form1_Unload
B．Form1_Unload
C．Form1_Close
D．Form1_End
解析：当从内存中清除一个窗体(关闭窗体或执行Unload语句)时触发该事件。如果重新装入该窗体，则窗体中所有的控件都要重新初始化。
第9题：
Two Level 2 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）
- A、An Adjacency is formed.
- B、No IS-IS PDUs are sent.
- C、An Adjacency does not form.
- D、An Adjacency forms but traffic is not forwarded.
正确答案:A
第10题：
A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）
- A、Two switch ports will be needed on a switch， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.
- B、Two switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.
- C、Two switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， two different IP addresses will be needed.
- D、One switch port will be needed on one switch， a splitter will be needed to split the connection， two ethernet cables will be needed for the server each connecting to two different Ethernet cards， and two different IP addresses will be needed.
正确答案:B