题目

已知:如图,Rt△ABC中,∠ACB=90°,CB<CA.求作:线段AB上的一点M,使得∠MCB=∠A. 作法:①以点C为圆心,CB长为半径作弧,交AB于点D; ②分别以点B,D为圆心,大于BD长为半径作弧,两弧在AB的右侧相交于点E; ③作直线CE,交AB于点M.∠MCB即为所求. 根据小伟设计的尺规作图过程, (1) 使用直尺和圆规,补全图形(保留作图痕迹); (2) 完成下面的证明.证明:连接CD,ED,EB.∵CD=CB,ED=EB,∴CE是DB的垂直平分线( )(填推理的依A poster has been put up in our school. All the school things are on sale in a shop. Jim, who is a VIP of the shop, wants to buy 3 books and 2 ball pens on Wednesday. He will pay_______.POSTERKindsPriceOn weekdaysOn weekendsBooks4 yuan3 yuanBall pens2 yuan1.5 yuan※If you are a VIP, you can get 10﹪ off.A.12 yuanB.14.4 yuanC.16 yuan
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