题目

补全对话。A.What's the matter?B.Let's see a doctor.C.What's your name?D.I feel sad.E.My head hurts.Tom: How do you feel?Li Ling: Tom: Li Ling: My head hurts. Tom: Dr. Wang: Li Ling: My name is Li Ling.Dr. Wang: What's the matter?Li Ling: 答案：【1】D【2】A【3】B【4】C【5】E已知在Rt△ABC中，∠C=90°，AC=3，BC=4．⊙O是Rt△ABC的外接圆，现小明同学随机的在⊙O及其内部区域做投针实验，则针投到Rt△ABC区域的概率是：______．