题干
Peter和May正在谈论节日，请补全他们的对话。
A. Yes, we do. B. What do you do on Chinese New Year's Day? C. My favourite holiday is Chinese New Year's Day. |
⒈____ ⒉____ ⒊____
答案(点此获取答案解析）
C,B,A
径为3的⊙O内，OA=，P为⊙O上一点，当∠OPA取最大值时，PA的长等于（ ）.