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[音频]

A. She will buy another calculator.
B. She wants the man to buy a calculator.
C. She will give the man a calculator for a coffee.
D. She wants to invite the man for a coffee.

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[音频]

A. Ken has something wrong with his cars.
B. Ken is better known than before.
C. Ken attend the important lecture.
D. Ken is always absent-minded.

△形接法的三相交流电路，若其相电压为127V，则线电压为（） V。

对称三相电源的特点是：（）、（）、（）

负载星形接法的对称三相电路中，若A相负载两端电压有效值为220V，B相负载阻抗为22∠45°Ω，则C相电流的幅值为（）。