列车运行基本方程式的物理意义是什么？_煤矿机电基本知识_全学科试题题库

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列车运行基本方程式的物理意义是什么？
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One of the most enjoyable jobs I've ever done was when I was a student. When you () what it was you may be a bit shocked, but () I know it sounds () I can assure you that it was in fact delightful. () it or not, I was grave-digger for a () summer. It was one of those hot, dry () which made the () as hard as rock and () needed a great deal of effort to dig the graves. Now, a grave-digger doesn't have anything to () with dead bodies. () he has to do is dig two-meter deep () and fill them in again when the coffin has been put (). As I said, it was a marvelous summer and I'm glad to say that I didn't have to work on my (). I had a workmate who had been digging graves since 1930. In spite of his depressing trade he was a () character, always laughing and () jokes. He () to tell me all about his experiences and I listened to him for hours () end. Mind you, () had to work quite hard and usually there were two or three graves to dig every day. () the time I had to go back to () I was fitter, browner and in some ways a wiser person.1、A) hear B) know C) tell D) say2、A) what B) because C) although D) however3、A) strange B) good C) pleasant D) unpleasant4、A) Take B) Hear C) Believe D) Like5、A) long B) short C) pleasant D) whole6、A) season B) summers C) days D) holidays7、A) ground B) field C) grave D) work8、A) which B) what C) it D) that9、A) do B) deal C) fear D) carry10、A) That B) All C) which D) where11、A) graves B) holes C) caves D) places12、A) down B) away C) on D) in13、A) hand B) energy C) own D) problem14、A) kind B) helpful C) bad D) cheerful15、A) telling B) speaking C) hearing D) doing16、A) was B) used C) wanted D) went17、A) to B) with C) without D) on18、A) he B) I C) we D) they19、A) By B) To C) At D) From20、A) dig B) work C) college D) employment

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