题目

在中，，是边上一点，以为直径的与边相切于点，连结并延长与的延长线交于点1.求证：2.若，求的面积．  答案： 1.证明：连结．切于，，又即，，．又，， 2.设半径为，由得．，即，，解之得（舍）． 解析:略 Brown said he was by no means annoyed；________he was glad to be able to make himself clearly understood.                                                (2012·浙江，14)A．all in allB．for one thingC．on the contraryD．by the way