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问题 单项选择题

统型应急电源控制箱合闸时，空气断路器跳闸。说明有短路现象，应检查负载、（）、输出电容是否短路。

A.整流模块U2

B.整流变压器

C.接触器KM

D.控制按钮

答案

参考答案：A

单项选择题

我国《宪法》规定，（ ）连续任职不得超过两届。

A． * * 、副 * * 、国务委员

B． * * 、副 * * 、各委员会主任

C． * * 、副 * * 、各部部长

D．副 * * 、秘书长
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单项选择题

Did you ever have someone’s name on the tip of your tongue and yet you were unable to recall it (1) this happens again, do no (2) to recall it. Do something (3) for a couple of minutes, (4) the name may come into your head. The name is there since you have met (5) person and his name. It (6) has to be dug out. The initial effort to recall (7) the mind for operation, but it is the subconscious (8) that go to work to dig up a (9) memory. Forcing yourself to recall (10) never helps because it doesn’t (11) your memory；it only tightens it. Students find the preparatory method help (12) examinations. They read over the questions (13) trying to answer any of them. (14) they answer first the ones (15) which they are most confident. Meanwhile, deeper mental activities in the subconscious mind are taking (16) ; work is being done on the (17) difficult questions. By the time the easier questions are answered, answers (18) the more difficult ones will usually begin to (19) into consciousness. It is often (20) a question of waiting for recall to come to the memory.

7（）

A.leads

B.begins

C.helps

D.prepares
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