在面部最以表现人老的感觉是（）。A、皱纹 B、胡须 C、骨骼凹凸 D、肤色 发布时间：2018-02-06 03:58 │ 来源：www.tikuol.com 题型：单项选择题 问题： 在面部最以表现人老的感觉是（）。A、皱纹B、胡须C、骨骼凹凸D、肤色
题型：单项选择题 若奇函数f（x）在定义域（-1，1）上是减函数（1）求满足f（1-a）+f（1-a2）＜0的集合M（2）对（1）中的a，求函数F（x）=loga[1-( 1a)x2-x]的定义域． 查看答案
题型：单项选择题 情景交际。选择句子，补全对话, 其中有两项是多余的。 A: It's very late. Are you still on the computer? B: Well, yes. 1. _____ A: What kind of e-mails? B: Some are messages from my friends and some are from the relatives. A: Do you have to write them back right away? B: 2. ____ Usually people want a quick reply. A: 3. _____ B:I've already had 40 people's addresses in my address book! 4. _____ A: 5. _____ E-mail is really very convenient(方便的). A. And I think e-mail is one of the best ways to communicate with others. B. I've got so many e-mails to go through. C. I agree with you. D. Of course! E. How many e-mail addresses have you had? F. I feel like getting more e-mails. G. I am not sure whether I'm right or wrong. 查看答案