题目

 函数  的定义域是           ． 答案：（-8，8）． 【解析】∵ 64 - x2＞0  ∴ x2＜64，-8＜x＜8，即(-8，8)．补全对话，从方框中选择适当的句子完成下列对话。每个选项只能用一次。 A: Have you ever read the novel Jane Eyre? B: ____1___ A: What a pity! It's a wonderful book,you know. B: Well, I've been wanting to read it for a long time, but I can't get a copy. Thy library has only three copies. ____2___ A: ____3___If you like,I'll lend it to you. B:Thank you. ____4___ By the way,when can I get it? A: ____5___ Will you please come to my house after school? B:Ok. I'll go as soon as school is over.