题目

补全对话A: Hi！Mike! Do you like animals?B: A: What animals do you like?B: I like dogs.A: B: Because they are cute and smart.A: I like pandas. They are friendly.B: Let's go to the zoo this Sunday.A:See you at 9 o'clock on Sunday morning.B: A. Why do you like them?B. That sounds good.C. Yes, I do.D. See you.E. What animals do you like? 答案：【1】C【2】A【3】E【4】B【5】D已知f(x)＝(x≠－)且f［f(x)］＝x,则常数c等于 A．－3   B．3  C．3或－3   D．5或－3