题目

______ I accept that he is not perfect, I do actually like the person. A. While   B. Since   C. Before   D. Unless 答案：A3．如图，△ABC中，∠C=90°，∠A=30°，AB中垂线交AC于D，交AB于E，则AC和CD关系是（　　）A．AC=3DCB．AC=2DCC．AC=$\frac{3}{2}$DCD．无法确定