单项选择题
The type of gauge most commonly used to measure pressure is the _____.
A.bimetallic type
B.diaphragm type
C.bourdon tube type
D.resistance-temperature type
A.
A.bimetallic
B.diaphragm
C.bourdon
D.resistance-temperature
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单项选择题
Small crack in the crankshaft bearing surface of a diesel engine are an indication of____.A.corrosion frettingB.insufficient lubricationC.abnormal wearD.fatigue failure
A.
A.corrosion
B.insufficient
C.abnormal
D.fatigue
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单项选择题
The alternating current generator supplying a load has a voltage drop resulted from the loadWhen the load has a lagging power factor this voltage drop _____.A.is smallB.may be neglectedC.is usefulD.is considerable
A.
A.is
B.may
C.is
D.is
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