题目

What is the probable relationship between the speakers?A.Strangers. B.A couple. C.Friends. 答案：【答案】C【解析】【原文】M: Hi, Mary. Very glad to see you here.W: Hi, Robert, I'm glad to see you here, too.M: Your bike is so beautiful. Where was it made?W: In China.两个圆的直径分别是4分米和8分米，求阴影部分的面积．