对于函数，若存在区间则称区间M为函数的一个“稳定区间”现有四个函数： ①②③④，其中存在“稳定区间”的函数有（）

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对于函数

，若存在区间

则称区间M为函数

的一个“稳定区间”现有四个函数：
①

②

③

④

，

其中存在“稳定区间”的函数有（）

A：①②

B：②③

C：③④

D：②④

上一题下一题 0.0难度选择题更新时间:2012-10-26 10:36:34

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B

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从对话后的方框中选择适当的选项补全对话
Ted: What's the best restaurant in town?
Kay: What kind of food do you like?
Ted: ____
Kay: Well, the French Deli is really good.
Ted: ____
Kay_: Yes, it's the most expensive restaurant in town. But it has the best service, too.
Ted:____
Kay: It's cheaper than the French Deli, but the food is kind of boring.
Ted: ____
Kay: Oh, that's a new place. It's the most popular restaurant in town.
Ted: Is the food good?
Kay: Yeah, if you like hot curry.
Ted:Yeah. I love it! Let' s go there.

A. How about the Curry House?
B. Hmn…And what is Nick's Diner like?
C. Oh, any kind of food is okay.
D. Is it expensive?

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