题目

阅读下列短文, 从每小题所给的A、B、C、D四个选项中选出一个最佳选项。MrsSmith is doing some shopping in a new shopping mall. Shewants to buy a 1. Sheis 2 around. Nowshe is in a big 3 shop. She is 4 one of the sweaters in the shop. Andthere is a young man 5 near her. MrsSmith wants to try 6 the sweater. Soshe asks the young man, Excuseme, can you serve(招待) 7?I want a sweater. Theyoung man is 8 and says, I'msorry. Ican'tserve you. MrsSmith says, Ofcourse you can. That'syour 9. Theyoung man says, Itis not my job. Iwant a sweater too. MrsSmith feels very 10. （1如图，抛物线y=x2+bx-c经过直线y=x-3与坐标轴的两个交点A，B，此抛物线与x轴的另一个交点为C，抛物线的顶点为D．（1）求此抛物线的解析式；（2）点P为抛物线上的一个动点，求使S△APC：S△ACD=5：4的点P的坐标．