利用跨相90°的接线方法测量三相电路的无功功率时,三相电压应对称,否则将产生误差。
参考答案:对
小题1:She insisted on __________ (send) the sick boy to hospital at once.
小题2:How long ______ he _________ (keep) the book since he borrowed it from the library?
小题3:We ____________ (learn) over 2,000 English words by the end of last term.
小题4:I hear that the result of the exam _______________ (announce) next week.
小题5:Love Ship is about a woman who _____________ (fall) in love with a man when she travels.
小题6:If the walls of your room _____________ (paint) blue, you’ll feel calm and peaceful.
小题7: The Green family ___________________ (have) dinner when the doorbell rang.
( )是企业因故提出与员工终止劳动合同的一项人事调整活动。
A.辞职B.辞退C.退职D.资遣