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單項(xiàng)選擇題

The solid waste was charged into the incinerator through （）.

A.the solid waste dump chute
B.an access door
C.the same way for waste oil burners
D.a changing opening

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單項(xiàng)選擇題

If plastic film insulation becomes damaged in air conditioning system, （） may form within the film.

A.evaporation
B.condensation
C.liquefies
D.vaporization

單項(xiàng)選擇題

Under tropical conditions, control valves have fully opened, but the room still hot.What measures can be taken in such a case?（）

A.Keep the plant running all time
B.Start another blower
C.Increase the ratio of circulated to fresh air
D.Reduce the seawater flow to the condenser

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