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【单选题】
电路如图1所示,开关闭合后,电感电压u 的时间常数 为( )。 图1A.
4s
B.
8s
C.
2s
D.
1s
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反馈参考答案：
举一反三
【简答题】永磁同步电动机的转子主要由 、转子铁芯和转轴构成。
【简答题】Canyou ___________ yourthoughtsbeforeyoutalk tome?(crystal)
【单选题】Though he was unhappy yesterday, he still did all the housework _____. [ ]
A.
by the way
B.
as usual
C.
as well
D.
as a result
【单选题】--- Doctor, canyou give me _____? --- Yes.
A.
some advices
B.
any advices
C.
an advice
D.
some advice
【简答题】补全下面对话。 A: Can you __________? B: No, but I want to __________. Can you __________ me? A: Sure. B: Great! When? A: I __________ I can __________ you in winter. B: Why? A: __________ there is _________...
【单选题】— You don't come from America, do you? — ______. I come from England. [ ]
A.
No, I do
B.
Yes, I do
C.
Yes, I don't
D.
No, I don't
【单选题】Everyone _____ I come from Sichuan. Actually, I come from Shandong. [ ]
A.
find
B.
think
C.
finds
D.
thinks
【单选题】早产是指
A.
指妊娠满20周至不足37周
B.
指妊娠满20周至不足36周
C.
指妊娠满28周至不足37周
D.
指妊娠满28周至不足36周
E.
指妊娠满27周至不足36周
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