题目内容

电动机产生的磁极对数减少一半时,电机的转速提高___倍

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想实现绕组连接方法的自动改变,可以在控制电路中接入____电器元件。

At least 5000 people were killed, and that's aconservative ______.

A. estimate
B. arithmatic
C. campaign
D. applaud

There may be some _____ changes to the schedule.

A. tricky
B. minor
C. ultimate
D. original

During his election ______ he promised to put the economy back on its feet.

A. estimate
B. trick
C. campaign
D. reflection

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