题目

小亮家到少年宫距离是4144米，他骑一辆车轮直径大约66厘米的自行车去少年宫，按车轮每分转100圈计算，他骑这辆车去少年宫大约需要多少分？（得数保留整数） 答案：【答案】解：3.14×66×100，＝207.24×100，＝20724（厘米）；20724厘米＝207.24米；4144÷207.24≈20（分钟）；答：他骑这辆车去少年宫大约需要20分。【解析】车轮转一圈走的路程就是车轮的周长，根据圆的周长公式求出走一圈的路程，进而求出一分钟走的路程，然后用总路程除以一分钟走的路程即可．Mr. Black was over fifty years old. He sometimes made some mistakes in his work, and he lost his work. So he had_____ time every day to do something. Then he often met his old friends under a big tree. They had drinks there and____ anything they liked.One day, some old men were sitting together again and talking about young people in the world. They all agreed that old people were____ than young people. Then one of the old ____said that young men were stronger than old men.____ of them agreed that this was true, _____ Mr. Black didn’t. He said, “No, I am as strong now as when I was a young man.” His friends were surprised ____ what he said.“Well,” said Mr. Black, “near my house there is a big stone. When I was a young man, I used_____ to move it, but I couldn’t because I was not _____. I am an old man now, and when I try to move it, I still ____. So, I am as strong as when I was young.”1.A. many B. a lot C. lots of D. lot2.A. talked for B. talked to C. talked with D. talked about.3.A. clever B. cleverer C. cleverest D. a clever4.A. man B. woman C. men D. women5.A. All B. None C. Both D. Neither6.A. so B. or C. and D. but7.A. at B. to C. of D. on8.A. trying B. try C. to try D. to trying9.A. strong enough B. enough strong C. weak enough D. enough weak10.A. can B. can’t C. could D. couldn’t