题目

There are two rooms on the first floor, ____ used as a guest room. A．the smaller of them                                 B．the smallest of them C．the smaller of which                                D．a smaller of which 答案：A（2007•滨州）第三象限内的点P（x，y），满足|x|=5，y2=9，则点P的坐标是    ．