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【判断题】
三相笼型异步电动机的电气控制线路，如果使用热继电器作过载保护，就不必再设熔断器作短路保护。A.
正确
B.
错误
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【简答题】(1) If your ager is talking about taking a year away from the classroom between high school and college, you may have Malia Obama to thank for that. But if they ́re not yet talking about whether t...
【单选题】—Thank you for reminding me of the time, or I ____ late yesterday． —Don’t mention it．
A.
should be
B.
would be
C.
will have been
D.
would have been
【单选题】Thank you for your timely help; otherwise we _______ in great trouble now.
A.
are
B.
would have been
C.
would be
D.
were
【简答题】以下属于对概念限制错误的是（ ）
【简答题】产品在规定条件下,在规定时间内丧失规定功能的概率称为____。
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