题目

完形填空Hi!I'm Paul. I am a 1.I come from the UK. But now I live in China. This is my 2. 45small desks, 45 chairs and one table 3 in the classroom. The desks and chairs are 4. And the table is green, too. 5 is on the table? It's a computer. It's notmine. It's Mr. Jiang's. Mr. Jiang is our math teacher. He always uses (用) the 6 in class. Is that your dictionary 7 the desk Mr. Jiang's? No, it isn't. 8 Helen's. And the English book under it on thedesk is hers, too. Helen is our monitor (班长). She is a 9girl. She 10helps us with our English. Welike her very much. （1） A . tea5．如图，四边形ABCD中，∠ABC=∠ADC=90°，∠C＜90°．点E、F分别是BC、CD上的动点，满足：△AEF的周长最小．（1）请在图中作出E、F（要求保留痕迹，不写作法）；（2）在（1）的条件下，若∠C=45°，且∠AEB=60°，请求$\frac{AF}{AE}$的值．