Heatdamagetofuelinjectionnozzlescanbepreventedbyavoiding()
A. excessivefueloiltemperature
B. longperiodsofengineoverload
C. metalliccontactbetweennozzlesandcylinderheads
D. hardcarbondepositandvarnishonthenozzles
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对以下两花图式判断正确的是()
A. 图Ⅰ所示花花冠的排列方式是镊合式
B. 图Ⅱ所示花雌蕊由三心皮构成,侧膜胎座
C. 图Ⅰ所示花雄蕊为二体雄蕊
D. 图Ⅱ所示花花程式为:*KCAG
分级定价策略的目的是()
A. 将消费需求引向企业真正意欲销售的产品
B. 以低价销售主件产品,配以高价销售购买频次高的次件产品,从而实现总体利润最大化
C. 便于客户选择比较,满足不同类型消费者的需求,从而促进销售
D. 避免以次充好
Theknockoccurringwhenacolddieselengineisstartedandcontinueswhilerunningatlowspeed,butstopswhentheenginereachesnormaloperatingspeedandtemperature,is().
A. causedbyretardedinjectiontiming
B. causedbyamechanicaldefectinonecylinder
C. causedbyhighfuelinjectionpressures
D. normalfortheseconditions
Thebrokenmagentalines(longandshortdashes)inandaroundMobjackBayindicate().
Amphibioustrainingareas
B. Groundsfordredgespoil
C. Fishtrapareas
D. Gunneryexerciseareas