题目内容

本应该

A. consist of
B. be supposed to
C. dedicate sth. to

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把......献给......

A. conclude sth. with
B. escape from
C. dedicate sth. to

死于

A. die of
B. tell sb. off
C. move around

逃脱

A. move around
B. escape from
C. tell sb. off

u,Um,U分别表示的是交流电压什么值()

A. 最大值、瞬时值、有效值
B. 有效值、瞬时值、最大值
C. 最大值、有效值、瞬时值
D. 瞬时值、最大值、有效值

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