题目

—Is Jim visiting his friend?—__________. A . Yes, he is B . No, he is C . Yes, he isn't D . No, he doesn't 答案：A如图所示，D，E是△ABC的边AB，AC上的点，∠A=35°，∠C=85°，∠AED=60°．试说明：（1）△ADE∽△ACB；（2）AD•AB=AE•AC．