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【单选题】
双向晶闸管的额定通态电流是用电流的( )来表示的。A.
有效值
B.
平均值
C.
最大值
D.
瞬时值
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【单选题】听力原文：W: Elizabeth Martin speaking. M: Dr. Martin, my name is Mark Johnson. My roommate Benjamin John is in your art history class, Art History 502. W: Yes. M: Well, he's sick and won't be in your clas...
A.
Find out about a course.
B.
See an adviser.
C.
Drop off a paper.
D.
Go to a meeting.
【简答题】选用适当的句子完成对话。 ( 答案请用大写的 A-E) A. Yes,I suppose I should have done so. B. OK.Take care and don’t eat any more fish. C. Why weren’t you here at the meeting? D . That’s all right. E. We thought you might h...
【简答题】At 10 years old, Flynn Mc Garry became sick of the meals his mother cooked for him. So the Los Angeles native took matters into his own hands and started his own dinners. One of his specialties...
【单选题】John is sick, so _________________.
A.
he will be able to come tonight
B.
he won’t be able to come tonight
【简答题】A. Why didn’t you phone ? B. OK. Take care and don’teat any more fish C. Why weren’t you here atthe meeting ? D. That’s all right E. We thought you might havehad an accident or forgotten the day or s...
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