问题
问答题 简答题
何为活塞环开口间隙并有什么要求？
答案
参考答案：自由状态下活塞环切口尺寸，自由状态下活塞环切口具有较大的开口尺寸，装入气缸后，切口处仍要求具有一定间隙。称为开口间隙。该间隙值有一定规定要求。间隙值有一定规定要求。间隙过大造成漏气严重，间隙过小活塞环受热膨胀时，又会造成卡弄死或折断事故。
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何为活塞环开口间隙并有什么要求？
参考答案：自由状态下活塞环切口尺寸，自由状态下活塞环切口具有较大的开口尺寸，装入气缸后，切口处仍要求具有一定间隙。称为开口间隙。该间隙值有一定规定要求。间隙值有一定规定要求。间隙过大造成漏气严重，间隙过小活塞环受热膨胀时，又会造成卡弄死或折断事故。
| 任务阅读。 |
| I think the most terrible thing in life for my little brother is getting up in the morning. He is almost sick when my mother calls, "Herbert! It's seven o'clock! Get up!" Herbert answers, "I'm coming!" and goes right back to sleep. I'm not at all like my brother. I don't like to go to bed at night but I don't mind getting up in the morning. I usually wake up before my mother calls me. I jump out of bed and go into the bathroom to take a shower. I get dressed, brush my teeth, comb my hair, and get ready to go downstairs for breakfast as soon as my mother calls. But not Herbert. He just sleeps. A military band (军乐队) in our bedroom could not wake him up. I call him and say, "Get up! Mum will be up here to pull you out of bed if you don't get up immediately!" But he just sleeps. After calling a few more times my mother has to come upstairs and pull Herbert out of bed. It's that way every day with my little brother. Perhaps some day he'll learn to get up on time, but I really don't think so. |
| 1. What is the most terrible thing in life for my little brother? _________________________________________________________ 2.将画线句子翻译成中文。 _________________________________________________________ 3. I jump out of bed and go into the bathroom to take a shower. 中的go into可以用单词 _______ 替换而意思不变。 4. 将I usually wake up before my mother calls me.中的before my mother calls me 改成被动语态。 __________________________________________________________ 5. 将After calling a few more times my mother has to come upstairs. 改成否定句。 __________________________________________________________ |