铝活塞与汽缸配合间隙,一般每100mm缸径为()mm。
A. 0.03~0.05
B. 0.08~0.10
C. 0.10~0.12
D. 0.12~0.20
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风险投资家的主要工作职能不包括()
A. 筹集风险投资资金
B. 发现、评估投资机会
C. 参与风险企业的管理
D. 策划和实施风险投资的退出
Fourstrokesconsistofsuction,compression,()andexhauststroke.
A. combustion
B. condensation
C. charging
D. evaporation
FuelhasbeeninjectedbutignitionfailsThepossiblecausemaybe().
A. leakyexhaustvalve
B. increasedscavengingairtemperature
C. enginecylindersnotscavengedsufficiently
D. waterinthefueloil
Fuelinjectedintoadieselenginescylinderisignitedby().
A. theheatcompressedfuel/airmixtureinthecylinder
B. thefueligniter
C. thefuelinjector
D. thefuelpump