[音频]
A. Call the secretary again at 10 days.
B. Make another appointment.
C. Express his thanks for the call.
D. Cancel the meeting with the secretary?
[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.
[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。
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