一定压力下,向液态完全互溶的 A 、 B 二组分气 - 液平衡系统中加入组分 B 后,系统沸点下降,则该组分在平衡气相中的组成 y B ( ) 其液相组成 x B 。
A. 大于 B. 等于 C. 小于
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An enterprise can get long-term profit only if it does not break the law.
A．一家企业能够获得长期利润，只有在它遵纪守法的时候。
B．企业只有不违法才能获得长期利润。
C．这家企业真不该违法，它本可以获得长期利润的。
D．企业只要不违法，就能获得长期利润。
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请阅读 Passage 2,完成第 26~30小题。Passage 2It's no surprise that Jennifer Senior's insightful, provocative magazine cover story, I love My Children, I Hate My Life, is arousing much chatter-nothing gets people talking like the suggestion that child rearing is anything less than a completely fulfilling, life-enriching experience. Rather than concluding that children make parents either happy or miserable, Senior suggests we need to redefine happiness: instead of thinking of it as something that can be measured by moment-to-moment joy, we should consider being happy as a past-tense condition. Even though the day-to-day experience of raising kids can be soul-crushingly hard, Senior writes thatthe very things that in the moment dampen our moods can later be sources of intense gratification and delight.The magazine cover showing an attractive mother holding a cute baby is hardly the only Madonna-and-child image on newsstands this week. There are also stories about newly adoptive-and newly single-mom Sandra Bullock, as well as the usualJennifer Aniston is pregnant news. Practically every week features at least one celebrity mom, or mom-to-be, smiling on the newsstands.In a society that so persistently celebrates procreation, is it any wonder that admitting you regret having children is equivalent to admitting you support kitten-killing? It doesn't seem quite fair, then, to compare the regrets of parents to the regrets of the childless. Unhappy parents rarely are provoked to wonder if they shouldn't have had kids, but unhappy childless folks are bothered with the message that children are the single most important thing in the world: obviously their misery must be a direct result of the gaping baby-size holes in their lives.Of course, the image of parenthood that celebrity magazines like Us Weekly and People present is hugely unrealistic, especially when the parents are single mothers like Bullock. According to several studies concluding that parents are less happy than childless couples, single parents are the least happy of all. No shock there, considering how much work it is to raise a kid without a partner to lean on; yet to hear Sandra and Britney tell it, raising a kid on their own (read: with round-the-clock help) is a piece of cake.It's hard to imagine that many people are dumb enough to want children just because Reese and Angelina make it look so glamorous: most adults understand that a baby is not a haircut. But it's interesting to wonder if the images we see every week of stress-free, happiness-enhancing parenthood aren't in some small, subconscious way contributing to our own dissatisfactions with the actual experience, in the same way that a small part of us hoped gettingthe Rachel might make us look just a little bit like Jennifer Aniston.It is suggested in Paragraph 3 that childless folks ____.
A.are constantly exposed to criticism B.are largely ignored by the media C.fail to fulfill their social responsibilities D.are less likely to be satisfied with their life
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