题目

—Thank you for your help! —_______. A . Good morning B . You are welcome C . Fine. thank you D . Nice to meet you 答案：B如图，?ABCD中，E是CD的延长线上一点，BE与AD交于点F，DE=CD．（1）求证：△ABF∽△CEB；（2）若△DEF的面积为2，求?ABCD的面积．