题目

 A direct order like “ Daisy, pass me the book” sounds rude. We’d better say: “________” A. Daisy, could you please pass me the book?  B. Daisy, I wonder if can you pass me the book. C. Daisy, give me the book! D. Daisy, I wonder you can pass me the book. 答案：A如图，△ABC≌△DEF，点A与D，B与E分别是对应顶点，且测得BC=5cm，BF=7cm，则EC长为（　　）A．1cmB．2cmC．3cmD．4cm