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【单选题】
在 电动机 的 继电 接触 器控制线路中, 零压保护 是 ( ) 。A.
防止电源电压降低后电流增大，烧坏电动机
B.
防止电源断电后电动机立即停车而影响正常工作
C.
防止停电后再恢复供电时，电动机自行起动
D.
防止电动机电流过大造成电源短路
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皮皮学刷刷变学霸
举一反三
【简答题】DNA分子整体都具有强的电负性，因此没有极性。3．DNA分子整体都具有强的电负性，因此没有极性。
【简答题】I need a ___________ to sort out my finances.(专业人士)
【单选题】My present finances —— the possibility of buying a car.
A.
inhibit
B.
appoint
C.
preclude
D.
maintain
【单选题】My father can't operate a computer.______.
A.
Nor can't my mother
B.
So can't my mother
C.
Neither can my mother
D.
Nor my mother can either
【单选题】听力原文：M: I'm hoping that I can get my finances in better shape. I can't spend money like this anymore, or I will get bankrupt. W: Well, follow a month-by-month plan and stop buying those unnecessary it...
A.
Try to save money month by month.
B.
Try to exercise each day.
C.
Try to buy some necessary items.
D.
Try to stick to a budget each month.
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