题目

第二节 信息匹配（共5小题；每小题2分，满分10分） 请阅读下列应用文和相关信息，并按照要求匹配信息。请在答题卷上将对应题号的相应选项字母涂黑。 某网站推出“Who is my angel ?”栏目，以下是有关该栏目中奖者的来信： A. From Morgan Dunnivan Hi, I’m 7 years old and my special angel is my mommy. She takes care of me and our house, works with troublesome teens as a volunteer, takes me to gymnastics every week, and works two jobs. My mommy is my best friend and we are angels for each other. She always thinks of othe在△ABC中，AB=AC，过点A的直线与其外接圆交于点P，交BC延长线于点D．（1）求证：；（2）若AC=3，求AP•AD的值．