题目内容

Thehydraulic()isusedtocontrolenginespeed.

A. motor
B. pump
C. governor
D. capstan

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Theignitionofthefuelindieselengineiscausedbythe()ofcompressionoftheairpreviouslyadmittedintothecylinders.

A. vacuumpressure
B. specificgravity
C. heat
D. viscosity

下面有关我国风险投资业现状及特点正确的是()

A. 政府资金仍占很大比重
B. 缺乏经验丰富的风险投资家
C. 有限合伙制是主要的形式
D. 投资集中于种子期和起步期的企业

装煤车蓄能器充氮压力和动作压力分别是()

A. 54kg/cm和54kg/cm
B. 54kg/cm和100kg/cm
C. 100kg/cm和54kg/cm
D. 100kg/cm和100kg/cm

Temperatureandmoisturecharacteristicsaremodifiedinawarmorcoldairmassdueto().

A. pressurechangesintheairmass
B. movementoftheairmass
C. theheterogeneousnatureoftheairmass
D. upperlevelatmosphericchanges

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