方程2x2-5x+2=0的两个根可分别作为( ) A.一椭圆和一双曲线的离心率

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问题:

方程2x2-5x+2=0的两个根可分别作为(  )

A.一椭圆和一双曲线的离心率

B.两抛物线的离心率

C.一椭圆和一抛物线的离心率

D.两椭圆的离心率

考点:椭圆的定义双曲线的定义
题型:选择题

Modern life is a lot les s to the advantage of friendships and neighborliness than it used to be. The average American moves every five years. People drive straight into their garages, hire lawn services, hang out in their backyards instead of their front porches (前走廊). These days, neighbors don't even know each other's names. 

Good neighbors and good friends are a lot like electricity or running water: We don't know how much we depend on them until we don't have them. In fact, the authors of a recent book, Refrigerator Rights, claim that refrigerators are signs of close relationships--after all, you wouldn't snatch a drumstick(鸡腿) from the refrigerator of a stranger.

The surprising thing is that all it takes to strengthen your relationship with friends and neighbors is respect for their feelings, concern for their property, and a helping hand when it's needed. Here's how to develop your relationships with two types of vitally important people in your life. 

_________________. A true friend doesn't flee when changes occur. The sign of a good friend is one who stays true through it all--marriage, parenthood, new jobs, new homes, the losses. Just because situations change doesn't mean the person has to.

Friendships fade away if there isn't an balance between the give and the take. So make sure you aren't being a burden to your friends. Be sensitive to how much your friend can and can't offer you--be it time, energy, or help -- and don't step over the line. Meanwhile, friendships that drain(耗尽) you will not last. If a friendship is out of balance in this way, you'll need to talk the situation through.

1. Which sentence in the passage is the closest in meaning to the following one?

A true friend will stay the same even when the situations change. 

2. Fill in the blank in Paragraph 4 with a proper sentence. (Within 10 words)

3. What advice is given in the last paragraph? (Within 10 words)

4. What do you think the author will go on talking about if the passage continues?(Within 10 words)

5. Translate the underlined sentence in the last paragraph into Chinese.

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对于该患者首选的治疗方案是

A.立即手术治疗切除阑尾,术后抗炎、保胎治疗,尽可能延长孕周

B.大量抗菌药保守治疗,可同时予甲硝唑

C.立即行剖宫产术,然后切除阑尾

D.立即行阑尾切除术,然后行剖宫产

E.大量抗菌药保守治疗同时可予抑制宫缩药,防止早产,尽可能不行手术

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农业技术市场的决定因素是()

A、农业技术商品的买方

B、农业技术商品的卖方

C、农业技术商品的中介者

D、农业技术交易的手段和条件

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关于杭州菜的表述正确的有()。

A.是浙菜的代表和主流

B.口味浓淡适中

C.喜欢以风景名胜命名菜肴

D.叫化童鸡是其菜品之一

题型:选择题

龙胆泻肝汤中清利湿热的药物是()

A.泽泻、木通、车前子

B.泽泻、车前子、茯苓

C.茯苓、车前子、木通

D.木通、泽泻、茯苓

E.猪苓、泽泻、木通

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