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仪器中有两个水准仪,如何将仪器调水平?
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举一反三
【简答题】跨装车组应使用车钩缓冲停止器，安装应在车钩（）下进行。
【简答题】读一读，选一选。 What, How, an, by bike 1. ____________ does he go to work? 2. ____________ does your father do? 3. She's ____________ actress. 4. She goes home ____________.
【简答题】完形填空。 Do you often think of your parents? You may say, 'Of course, I 1 .I buy a present for my mother on Mother’s Day and on Fath er’s Day I give my father 2 , too.” But what about the other days of t...
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