题目

听下面一段独白，回答以下小题。【1】How many beaches are in the San Diego area?A. Seven. B. Fifteen. C. More than one hundred.【2】What can you find at Scripps Pier?A. Many surfers. B. A statue of dolphin. C. A marine science university.【3】Where are the rides?A. At Mission Beach. B. At Coronado Beach. C. At Black’s Beach.【4】What is true about Imperial Beach?A. It’s next to Mexico.B. It’s the best beach for diving.C. It’s one of the top ten beaches in San Diego.已知⊙O1与⊙O2的半径分别为2和3，若两圆相交，则两圆的圆心距m满足（ ）A．m=5B．m=1C．m＞5D．1＜m＜5