题目内容

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

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

A. 对
B. 错

A. 对
B. 错