补全对话。
A: Excuse me! ____
B: Yes. Please keep your desk clean.
A: ____
C: Wow! Your picture is so beautiful!
B: ____
C: Oh, I'm sorry. ____
B: Sure!
C: ____
B: Yes, work quietly.
A. Can I write my diary here? B. May I use your pencil? C. Anything else? D. OK. I will. E. Be quiet, please! |
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，且
，则
的值是 （ ）
在实数范围内有意义，则 x 的取值范围是（ ）