题目

A.He did his homework. B.He watered flowers.C.He helped his father clean the car. D.He did some housework. 答案：【答案】C【解析】【原文】W: You look tired. What did you do last weekend?M: On Saturday, I didn't finish my homework until 11:00. Then I watered flowers.W: And what did you do on Sunday?M: I helped my father clean the car.Q: What did the boy do on Sunday? (C)下列运算中，计算结果正确的是（　　）A．x?x3=2x3B．x3÷x=x2C．（x3）2=x5D．x3+x3=2x6