lsat set5-sec4-11,24 请教

sunder · 发表于 2003-8-10 21:04:00

11.Nature constantly adjusts the atmospheric carbon level. An increase in the level causes the atmosphere to hold more heat, which causes more water to evaporate from the oceans, which causes increased rain. Rain washes some carbon from the air into the oceans, where it eventually becomes part of the seabed. A decrease in atmospheric carbon causes the atmosphere to hold less heat, which causes decreased evaporation from the oceans, which causes less rain, and thus less carbon is washed into the oceans. Yet some environmentalists worry that burning fossil fuels may raise atmospheric carbon to a dangerous level. It is true that a sustained increase would threaten human life. But the environmentalists should relax – nature will continually adjust the carbon level.

Which one of the following, if true, would most weaken the argument in the passage?

(A) Plant life cannot survive without atmospheric carbon.

(B) It is not clear that breathing excess carbon in the atmosphere will have a negative effect on human life.

(C) Carbon is part of the chemical “blanket” that keeps the Earth warm enough to sustain human life.

(D) Breathing by animals releases almost 30 times as much carbon as does the burning of fossil fuels.

(E) The natural adjustment process, which occurs over millions of years, allows wide fluctuations in the carbon level in the short term.

答案E。我看着怎么像support？是理解有误么？

24. It has been claimed that an action is morally good only if it benefits another person and was performed with that intention; whereas an action that harms another person is morally bad either if such harm was intended or if reasonable forethought would have shown that the action was likely to cause harm.

Which one of the following judgments most closely confirms to the principle cited above?

(A) Pamela wrote a letter attempting to cause trouble between Edward and his friends; this action of Pamela’s was morally bad, even though the letter, in fact, had an effect directly opposite from the one intended.

(B) In order to secure a promotion, Jeffery devoted his own time to resolving a backlog of medical benefits claims; Jeffrey’s action was morally good since it alone enabled Sara’s claim to be processed in time for her to receive much-needed treatment.

(C) Intending to help her elderly neighbor by clearing his walkway after a snowstorm, Teresa inadvertently left ice on his steps; because of this exposed ice, her neighbor had a bad fall, thus showing that morally good actions can have bad consequences.

(D) Marilees, asked by a homeless man for food, gave the man her own sandwich; however, because the man tried to talk while he was eating the sandwich, it caused him to choke, and thus Marilees unintentionally performed a morally bad action.

(E) Jonathan agreed to watch his three-year-old niece while she played but, becoming engrossed in conversion, did not see her run into the street where she was hit by a bicycle; even though he intended no harm, Jonathan’s action was morally bad.

这道题，在lsat提问总结中有。但怎么排除A呢？请教高手。

btw,题干中“only if”在gmat在gmat中通常引导必要条件,而充要条件用“if and only if”。那么"only if"可不可以也算是引导充分条件呢？毕竟有"if"在“only if”里嘛。

jubel · 发表于 2003-8-11 21:43:00

11. 短文的argument在于反对Yet some environmentalists worry that burning fossil fuels may raise atmospheric carbon to a dangerous level.这种观点。那么如果能support这种观点就是weaken the argument 了。E选项说短期内会导致大的波动，那就是说短期内会有carbon reaches to a dangerous level的情形，则支持了环保人士的观点，从而weaken了argument.

24题，我怎么看都不明白能选别的什么选项啊。

sunder · 发表于 2003-8-11 22:33:00

11. thanks! jubel. “E选项说短期内会导致大的波动，那就是说短期内会有carbon reaches to a dangerous level的情形”，我没想到这层。误解了E，还以为allow了就没问题了。

24. A不是正确答案，E是。我觉得 A,E都是。

以下是引用jubel在2003-8-11 21:43:00的发言：
11. 短文的argument在于反对Yet some environmentalists worry that burning fossil fuels may raise atmospheric carbon to a dangerous level.这种观点。那么如果能support这种观点就是weaken the argument 了。E选项说短期内会导致大的波动，那就是说短期内会有carbon reaches to a dangerous level的情形，则支持了环保人士的观点，从而weaken了argument.

24题，我怎么看都不明白能选别的什么选项啊。

littlegirl · 发表于 2003-8-12 13:06:00

A不是答案，因为Pamela没有harms another person,虽然她intended to do so.

sunder · 发表于 2003-8-12 14:19:00

whereas an action that harms another person is morally bad either if such harm was intended or if reasonable forethought would have shown that the action was likely to cause harm.

thanks! littlegirl.
又看了一遍题干里的定义, “that harms another person ” 竟然给我忽略了。
sigh,考试的时候怎么办啊？

以下是引用littlegirl在2003-8-12 13:06:00的发言：
A不是答案，因为Pamela没有harms another person,虽然她intended to do so.

jubel · 发表于 2003-8-12 20:47:00

我懂了24。看来细心很重要。

kevintong · 发表于 2004-3-17 14:10:00

24的b呢

windychen0089 · 发表于 2010-11-16 06:15:19

The argument is: scientists don't need to worry that an increasing carbon level will threaten human life because nature will continually adjust the carton level. In answer E, nature process allows a wide fluctuations in the carbon level in the short term, but it needs millions of years, which is certainly dangerous to human life (normally less than 100 years)and thus weaken the argument.

lsat set5-sec4-11,24 请教

lsat set5-sec4-11,24 请教

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