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單項(xiàng)選擇題

After fitting back in place the gear wheels, don’t forget to （） them.

A.fulfill
B.eliminate
C.grease
D.bend

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單項(xiàng)選擇題

What separate the high pressure side from the low pressure side in a refrigeration system?（）

A.Condenser and thermal expansion valve
B.King and solenoid valves
C.Compressor and thermal expansion valve
D.Condenser and solenoid valve

單項(xiàng)選擇題

Which of the following best describes “overcharge of refrigerant”?（）

A.Too much refrigerant
B.Too little refrigerant
C.Refrigerant is ran out
D.Running is over