来源:蜘蛛抓取(WebSpider)
时间:2014-11-11 13:18
标签:
分轨是什么意思
汽车应用了许多物理知识,请你解答:
(1)汽油机是汽车的“心脏”,一台四冲程汽油机工作时曲轴转速是1800r/min,此汽油机每秒钟完成个做功冲程,其中冲程将机械能转化为内能;
(2)汽车在爬坡时,驾驶员的操作总是加大油门同时将变速器换为低档.加大油门是使发动机发挥最大的功率,换为低档是为了减慢车速,那么在爬坡时减慢车速的目的是.
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