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【判断题】
只要改变旋转磁场的旋转磁场的旋转方向,就可以控制三相异步电动机的转向。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】阅读文章，回答下列各题： This is the second month running that your delivery has been late in arrival. Our current order for stationery is already 6 days overdue. We have a number of valued customers who are bein...
【单选题】______is not mentioned in the text as having become popular with the public after the disaster.
A.
Dating
B.
Getting married
C.
Traveling
D.
Playing chess
【单选题】听力原文：W Chandler, did you speak to the people in shipping about my delivery? I need to show a the samples tomorrow. M Yes. They said that it will arrive tomorrow afternoon. W I'm afraid that'll ...
A.
She didn't make an arrangement for delivery.
B.
She didn't receive her package.
C.
She will be late for the meeting.
D.
She can't contact the supervisor.
【单选题】year after year , tigers are becoming fewer and fewer .
A.
Having been killed
B.
Killing
C.
Killed
D.
Having killed
【简答题】After having asked somebody a question, it'll be polite of you to __________.
【简答题】A．After having the request signed by the doctor. B．After meeting Prof. Brown. C．After talking with the Dean. D．After meeting Mr. Cheng.
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