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In extreme weather conditions, either hot or cold, control of the air conditioning plant presents () difficulties.
A.few
B.little
C.a little
D.less
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Because of the reduced ()in the distillation system, some of the sea water boils as it flows through the tubes of the evaporator.
A.pressure
B.temperature
C.density
D.volume
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單項(xiàng)選擇題
Because of the reduced () in the distillation system, some of the sea water boils as it flows through the tubes of the evaporator.
A.pressure
B.temperature
C.density
D.volume
點(diǎn)擊查看答案&解析
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