A centrifugal compressor’s purge recovery unit（）
A. reclaims water
B. purges air without losing refrigerant
C. purges air with some loss of refrigerant
D. purges lube oil from the refrigerant
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施工、监理单位应当在工程（），将各自形成的有关工程档案向建设单位归档。
A. 工程初验前
B. 工程初验后
C. 工程终验前
D. 工程终验后
ABC分类管理方法是一种现代化的库存管理方法。
A. 正确
B. 错误
在停车需要撒砂时，能在车轮空转和滑行时撒砂。
A. 正确
B. 错误
The amount of expansion space to be left in a fuel tank when fuel oil is being received, is determined by the （）.
A. quantity of fuel to be received
B. flash point of the fuel as it is received
C. fuel temperature as it is received
D. viscosity of the fuel being received
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