问题
选择题
小强在北京将一根质量分布均匀的条形磁铁用一条线悬挂起来，使它平衡并呈水平状态，悬线系住磁体的位置应在：（ ）
磁体的重心处
磁体的某一磁极处
磁体重心的北侧
Ｄ. 磁体重心的南侧
答案
答案：C
如图，条形磁体的上端是N极，向下微倾，要使质地均匀的条形磁体水平平衡，悬线系在重心的北侧．故选C．
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小强在北京将一根质量分布均匀的条形磁铁用一条线悬挂起来，使它平衡并呈水平状态，悬线系住磁体的位置应在：（ ）
磁体的重心处
磁体的某一磁极处
磁体重心的北侧
Ｄ. 磁体重心的南侧
答案：C
如图，条形磁体的上端是N极，向下微倾，要使质地均匀的条形磁体水平平衡，悬线系在重心的北侧．故选C．
Although I had left school against the advice of my teachers, I had, without telling anyone, tried to 36 my studies in literature at evening classes. It was a tiresome 37 from one end of the city to another and to 38 among adults was uninteresting. I was the youngest in the 39 , so the friendship I knew at school was 40 . I put up with it for a short period. It was 41 long a walk on cold winter’s nights and it was hard to put my 42 into Shakespeare with wet shoes and trousers. So I continued writing poetry at home. By chance, I 43 some prizes and awards for literature. A young woman from a 44 company came to the college one day. She told me that I won a national poetry award. I 45 at her in astonishment and disbelief. She wanted to make a short 46 about me, to which I said, “ No, I couldn’t do that.” Not that I had any real 47 . I was just frightened. In the end she 48 me that I should do it the following day. So I did. They made a short film of me reading one of my 49 and I became 50 interested in literature than ever. I 51 what I should do after this, and decided some weeks later that I could not 52 myself spending the rest of my days dealing with machines. So one evening, I hesitatingly told my parents that I wanted to _53 to school. They were greatly surprised and a little afraid, but they did not try to persuade me not to. They wanted to know if I was 54 , and if I knew what it meant and 55 I realized that if I gave up my job training, it would be very difficult to get a good job. But nothing could stop me, and they asked about the matter no further. 36．A．stop B．go on C．continue D．walk 37．A．talk B．journey C．job D．walk 38．A．do B．sit C．talk D．work 39．A．family B．class C．city D．country
42．A．mind B．heart C．soul D．thought 43．A．defeated B．beat C．won D．hit 44．A．TV B．radio C．shoe D．food 45．A．looked B．fixed C．shouted D．stared 46．A．talk B．film C．conversation D．speech 47．A．reason B．cause C．excuse D．wish 48．A．advised B．suggested C．agreed D．persuaded 49．A．poems B．stories C．speeches D．plans 50．A．less B．much C．far D．more 51．A．wandered B．considered C．discussed D．wondered 52．A．think B．consider C．spend D．imagine 53．A．drop B．leave C．return D．go to 54．A．sure B．clear C．curious D．true 55．A．whether B．that C．how D．what |