皮皮学，免费搜题
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【判断题】
ZPW-2000A型无绝缘移频自动闭塞发送器频偏为±11Hz。A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】A pressure drop through the refrigerant liquid line may cause _____.
A.
solenoid valve to seize
B.
compressor to hunt
C.
formation of flash gas in the liquid line
D.
expansion valve to freeze open
【简答题】Two heads are better than one. ______
【单选题】What does the man's company mainly produce?
A.
Medical equipment.
B.
Special machine.
C.
Medicine for hospitals.
【单选题】The solenoid valve can be typed as a .
A.
thermal valve
B.
magnetic stop valve
C.
bellows valve
D.
bimetallic valve
【单选题】A special research team from the local medical center【C1】______experiments on completely blind babies. The babies to be tested on lived at home with their mothers of families. The research workers wou...
A.
carried
B.
did
C.
finished
D.
took
【判断题】Special meals are offered for customers with specific dietary, religious or medical needs.
A.
正确
B.
错误
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