题目

方程2x（x﹣3）=5（x﹣3）的根是（ ） A．x=                               B．x=3   C．x1=，x2=3                        D．x1=﹣，x2=﹣3 答案：B解：如图，作点D关于直线AB的对称点H，连接CH与AB的交点为E，此时△CDE的周长最小． ∵D（，0），A（3，0）， ∴H（，0）， ∴直线CH解析式为y=﹣x+4， ∴x=3时，y=， ∴点E坐标（3，） 故选：B．John lived with his mother in a very big house, and when his mother ________, the house became too big ________ him, so he bought a ________ one in the next street. There was a very nice, old clock in his ________ house, and when the men came to take his things to the new house, John thought, “I’m not going to let them ________ my beautiful old clock in their truck. Perhaps they will break it, and then it will be very expensive to repair it.” So he __________and began to carry it down the road in his arms. It was heavy, so he stopped two or three times to have ________. Then suddenly a small boy came along the road. He stopped and looked at John for ________ seconds. Then he said to John, “You’re a ________, aren’t you? ________ don’t you buy a watch like everyone else?”【1】A. worked B. studied C. died D. played【2】A. at B. with C. about D. for【3】A. larger B. bigger C. nicer D. smaller【4】A. second B. third C. first D. new【5】A. to carry B. bring C. to take D. carry【6】A. picked it up B. picks it up C. picks up it D. picked up it【7】A. a look B. a drink C. a walk D. a rest【8】A. a few B. few C. little D. a little【9】A. great B. fool C. clever D. bright【10】A. Where B. Why C. How D. When