动脉粥样硬化患者应（）。 A.维生素B有促进能量利用的功能，所以应该限制 B.控制胆

某校参加数学竞赛的选手平均分数是75分，其中参赛男选手比女选手人数多80%，而女选手比男选手的平均分数高20%，则女选手的平均分是多少( )

A．75

B．90

C．70

D．84

爸爸把两瓶同样的饮料分别倒进了一个大玻璃杯和两个小玻璃杯，问正在读小学二年级的女儿是要一大杯饮料，还是要两小杯饮料。女儿小红告诉爸爸两种一样多，哪一种都可以。这表明小红的认知发展处于（）。

A.感知运动期

B.具体运算期

C.前运算期

D.形式运算期

Alcohol has a peculiar relationship to happiness. We drink to celebrate, but because alcohol works as a depressant, it ends up deadening feelings. Not surprisingly, there’s an observable connection between alcoholism and depression, and even though it’s not always clear which leads to which, everyone knows you can’t drink like a Sterling Cooper employee for too long before becoming a perpetual sad sack.
But if alcohol can lead to depression, does that mean abstaining (戒除) from alcohol will make you happier A new study suggests that the opposite actually tends to be true. In fact, those who never drink are at significantly higher risk for not only depression but also anxiety disorders, compared with those who consume alcohol regularly.
The study, which was published recently in the journal Addiction, looked at more than 38,000 people in Norway. Researchers, led by Jens Christoffer Skogen of the University of Bergen in Norway, asked the participants how much they had drunk in the previous two weeks; the research team also asked them various questions to measure their levels of anxiety and depression.
People in the top fifth percentile (百分点) of drinkers had the highest odds for ’anxiety. But it was abstainers who were at the highest risk for depression--higher even than the heaviest of drinkers. Why
One reason is that the abstainers in the study sample were more likely to have chronic illnesses, and people with chronic illnesses are more prone to melancholy. Also, "some people assume it’s healthier not to drink," says Skogen--which may be particularly true of those who have chronic illnesses. Finally, some abstainers were formerly heavy drinkers--alcoholics who had to give up the bottle. It makes sense that they would have more psychological distress than others, but only 14% of the abstainers in the Norway study fit this category.
The most powerful explanation seems to be that abstainers have fewer close friends than drinkers, even though they tend to participate more often in organized social activities. Abstainers seem to have a harder time making p friendship bonds, perhaps because they don’t have alcohol to lubricate their social interactions. After all, it’s easier to reveal your worst fears and greatest hopes to a potential friend after a Negroni or two.
So does this mean we should all have a cocktail Maybe, but Skogen says he doesn’t believe his study should encourage abstainers to become drinkers. Rather, "he says doctors might want to investigate why abstaining patients don’t drink and explain that in societies where alcohol use is common, not drinking may lead them to feel left out. Sometimes, you should just say yes.

According to Jens Christoffer Skogen’s study, ______ are at the least risk for depression.

A. those who quit alcohol after some time
B. those who have never drunk alcohol
C. those who drink alcohol heavily

D. those who drink alcohol regularly

神舟5号发射时从起飞到最后一级关机，运载火箭一共工作了多少时间（）

A.57秒

B.90秒

C.585秒

何年何月何日，国务院印发了《关于促进红十字事业发展的意见》：（）。

A、2012年7月11日

B、2012年8月3日

C、2013年1月1日