题目内容

You may borrow any book _____.

A. that you interest
B. which you are interested
C. that interests you
D. which interests you

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The reason _____ I'm writing to you is to tell you about a party on Saturday.

A. because
B. why
C. for
D. which

The film is set in the period _____ the divide between rich and poor was greater than it is now.

A. where
B. when
C. which
D. why

电阻元件的电压电流相位关系是()。

A. 相位相同
B. 电压超前电流90°
C. 电流超前电压90°
D. 不确定

自感系数为L=0.01h的电感在交流电路中的感抗为3.14欧姆,该电路的频率大小为()。

A. 60HZ
B. 50HZ
C. 100HZ
D. 400HZ

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