题目内容
发动机在怠速或低速运转时，在气缸的伤部发出清晰而明显的“嗒嗒嗒”的金属敲击声，而中速以上运转时响声减弱或消失是活塞销响的现象之一。
查看答案
搜索结果不匹配？点我反馈
更多问题
造成点火敲击响的主要原因是发动机爆燃，其次也可能是早燃。
[音频]M: Excuse me. Have they started boarding for the 1.____to London?W: Flight BA 2.____ to London, sir?M: Yes, ma’ am. When can passengers begin to board? I have been waiting here for quite a while.W: I’m sorry. But this flight is 3.____.M: What? It is delayed? How come we got no 4.____?W: I’m very sorry for the inconvenience. 5.____ ago there was announcement. The flight is delayed 6.____ a sudden ____.M: How 8.____ will we have to wait?W: I’m terribly sorry, but I really don’t know for 9.____ now. I’ll keep you 10. ____ as soon as possible.
发达市场经济国家不同的市场经济模式，主要取决于与市场关系的不同组合
水利水电工程按其规模、效益和在国民经济中的重要性划分为（ ），工程中的水工建筑物根据所属工程等别及其在工程中的作用和重要性划分为（ ）。
微信支付 
支付宝支付