题目

如图6­1­17，已知四边形ABCD是矩形，把矩形沿直线AC折叠，点B落在点E处，连接DE.若DE∶AC＝3∶5，则的值为( ) A.  B.    C.   D. 答案：A1.Tom wants to ______ to a teacher. (结婚)2.Deng Ziqi has a ______ and she sings very well. (好声音)3.He kept calm ______ great difficulties. (面对)4.______, or you will be late. (赶快)5.How does the ______ make you feel? (流行歌曲)