Anoperationalamplifier,asusedintodaysconsoles,mayhaveacalculatedgainof5√Thismeansthatastheinputchangesby()
A. 1volt,theoutputchanges5volts
B. 5volts,theoutputchanges1volt
C. 5volts,theoutputchanges10volts
D. 10volts,theoutputchanges5volts
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当员工犯错误时,部门经理应避免做的是()。
A. 要及时地纠正员工错误
B. 对较严重的错误应给予适当的惩罚
C. 纠正错误只要告诉他错在哪里就可以了
D. 应私下及时修正
Whenthecurrentinapowertransmissionlineisincreased,thepowerloss()
A. increasesasthesquareofthecurrent
B. decreasesasthesquarerootofthecurrent
C. remainsthesame,asitisindependentofcurrentflow
D. increasesindirectproportionasthecurrent
Whichofthelistedsectionsofanemergencyswitchboardisusedtosupplypowerforalarmsignalsunderemergencyconditions?()
A. Thegeneratorandbustransfersection
B. The450volt,60cycle,3phasebus
C. The120volt,3phase,60cyclebus
D. The24voltDCbus
小车额定运行速度是在规定作业工况下,满载时()运行时的最高线速度.
A. 顺风
B. 无风
C. 逆风