题目内容

cognitive

A. related to the process of knowing, understanding, and learning sth.
B. related to the process of finding a job
C. related to the process of making a car
D. related to the process of teaching a class

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exotic

A. sth. that is unknown to all the people
B. sth. that is colorful
C. sth. that is familiar to all the people
D. sth. in or from a distant foreign country

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trivial

A. very particular and outstanding
B. very prominent and well-known
C. not very dull or boring
D. not very interesting, serious, or valuable

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关于单相交流调压电路的描述正确的是（）

A. 由两个晶闸管串联组成
B. 由两个晶闸管并联组成
C. 由两个晶闸管反并联组成
D. 由两个晶闸管反向串联组成

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三相交流调压电路工作时任一时刻均有三只晶闸管同时导通。

A. 对
B. 错

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cognitive

A. related to the process of knowing, understanding, and learning sth. B. related to the process of finding a job C. related to the process of making a car D. related to the process of teaching a class

exotic

trivial

关于单相交流调压电路的描述正确的是（）

三相交流调压电路工作时任一时刻均有三只晶闸管同时导通。

A. related to the process of knowing, understanding, and learning sth.
B. related to the process of finding a job
C. related to the process of making a car
D. related to the process of teaching a class