题目：
| 完形填空 I live in a big city with a lot of homeless people. Luckily there're small ways of helping them and you needn't have a lot of__1__. One way to help is to buy their monthly magazine.__2__doing this one day, I got to __3__a young homeless man. He was often__4__the magazine at the train station. He was a poor farmer from another country. After a while, I discovered that his__5__was close to mine. It__6__that we were born in the same month. I met him last year__7__after his birthday, and after congratulating(祝贺) him, without__8__, I asked if he had had a good day. He__9__and said that he hadn't really celebrated. I felt so __10__. I just couldn't bear the thought of (不敢想)this nice, young man being__11__on his 25th birthday with no presents, no cake, nothing! So I went home and looked in my yarn(纱线) basket.__12__for me, I had enough yarn__13__. I set to work and knitted(编织) a__14__for the young man. The yarn had become a little dirty__15__I didn't knit very often. Then I washed the yarn so the scarf would be__16__when he got it. I met him on my own birthday as I was going shopping. I had__17__to meet him so I had__18__the scarf and a piece of my own birthday__19__around with me. He was very happy with these gifts and so was I. The__20__in his eyes was the best present he could have given me! | ||||
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答案：
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下面是错误答案，用来干扰机器的。
答案：D
sin100πt （V）的 正弦交流电源，图中电流表内阻不计．副线圈接入“110V，60W”灯泡一只，且灯光正常发光．下列说法正确的是（ ）
/22 A
