题目

如图，△ABC是⊙O的内接三角形，AC是⊙O的直径，∠C=50°，∠ABC的平分线BD交⊙O于点D，则∠BAD的度数是（     ） A．45°       B．85°       C．90°       D．95° 答案：BChoose. 选择正确问句。1. It's windy and cloudy. [     ]A. What can you do?B. How's the weather?C. May I help you?2. To the shop. [     ]A. What are you doing?B. What do you want to do?C. Where are you going?3. He is driving a car. [     ]A. What are they doing?B. What can he do?    C. What is he doing?