问题
问答题 简答题
与机身一起反映在个别气缸上的敲击声是何原因？怎样排除？
答案
参考答案：
与机身部分一起反映在个别汽缸上的敲击声可能是：
1、活塞环突出于气缸滑动面外锥体面而刮缸；
2、活塞余隙容积过小，产生轻度冲击；
3、活塞螺母松动与外套轻度冲击；
4、杂夹物落于气缸内；
5、冷凝水排除不好，产生水击现象；
6、将气缸套装好；
7、更换金属填料。
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与机身一起反映在个别气缸上的敲击声是何原因？怎样排除？
参考答案：
与机身部分一起反映在个别汽缸上的敲击声可能是：
1、活塞环突出于气缸滑动面外锥体面而刮缸；
2、活塞余隙容积过小，产生轻度冲击；
3、活塞螺母松动与外套轻度冲击；
4、杂夹物落于气缸内；
5、冷凝水排除不好，产生水击现象；
6、将气缸套装好；
7、更换金属填料。
I can’t remember when I started collecting litter. But it was when I got tired of seeing litter nearby and ___1___ that no one else was going to pick it up. I live near a forest in Ohio, America. I can walk there ___2___ three minutes. I used to love going there to play with my dog. But one day there was ___3___ much litter there that I became very unhappy. I decided I had to clean up the forest. I wanted to feel happy ___4___ there again. I __5___ my first trip to clean the forest that afternoon. I took a big black rubbish bag with me. Ten minutes after starting to pick up litter, my bag was ___6__! It had cans, bottles, broken glasses and newspapers in it. From then on, I went to the forest four times a year to pick up litter. I’m often there for three hours. It makes me feel ___7___ to do something for the environment. After each trip, I look at all the litter that I’ve found. If ___8___ of it is recyclable(可回收的) , I keep it. I can’t understand ___9___ people drop litter. But I will keep picking it up until they stop dropping it. I know I am only doing a small bit to ___10___ the earth, but I still think it is important.
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