题目

Professor White has written some short stories, but he is ______known for his plays. A . the best B . more C . better D . the most 答案：C25、如图：在△ABC中，∠C=90° AD是∠BAC的平分线，DE⊥AB于E，F在AC上，BD=DF；说明：（1）CF=EB．（2）AB=AF+2EB．