问题
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The tendency of a flammable liquid to vaporize is indicated by its _____.
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Before liquid can flow into a pump, the air in the suction line must be _____ sufficiently
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A liquid indicator sight glass is useful in determining whether or not a refrigeration sys
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Compensated flow control or constant flow valves are used in hydraulic systems to .A.compe
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Liquids are like solids______ they have a definite volume.A.in whichB.thatC.in thatD.which
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According to the second rule, too much liquid in the cooker may result in______ .A.a ruine
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