单选题
发布日期:2021-03-22
prevent any lubricant from reaching
prevent excessive lubrication from reaching the combustion space
Provide metal-to-metal contact to seal the cylinder against blow-by
assure a positive means of scraping carbon accumulation from the cylinder
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格林-巴利综合征的典型临床表现之一为四肢远端()
下面属于罗马法中的物权的包括()。
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由一条多肽链组成而具有多种不同催化功能的酶为( )。
Hg中毒会引起失眠、多梦、抑郁、胸闷、心悸、多汗、恶心、牙龈出血。
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《上海铁路局劳动安全管理办法》(上铁安[2015]301号)规定,路局以责任事故年重伤率控制在()‰以下为劳动安全目标。
整体资产鉴证的对象为( )。
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