题目内容

RLC串联谐振时,电路的阻抗最大且为纯电阻。

A. 对
B. 错

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在一般的正弦交流电路中,电路的阻抗角越大电路的功率因数越小。

A. 对
B. 错

在感性负载两端并联一个适当的电容器可改善电路的功率因数。

A. 对
B. 错

We should like to ______ you to our barbeque tomorrow.

A. invitation
B. information
C. introduce
D. invite

But ______ if I lived on the border to Mexico, I would be able to speak English and Spanish.

A. maybe
B. always
C. never
D. certainly

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