题目内容

Congressmen serve a term of six years while senators serve a term of two years.

A. 对
B. 错

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The Democrats are thought of as associated with business, Anglo-Americans, and the rich.

A. 对
B. 错

The number of Senators from each state is based upon its population.

A. 对
B. 错

纯电感电路中无功功率用来反映电路中（）。

A. 纯电感储存电能的情况
B. 无用功的多少
C. 能量交换的规模
D. 消耗功率的多少

纯电感电路的感抗是( )。

A. 1/ωL
B. ωL
C. U/ωL
D. IωL