求nn相助~

Chrislvzh · 发表于 2011-4-7 21:35:40

Birds need so much food energy to maintain their body temperatures that some of them spend most of their time eating. But a comparison of a bird of a seed-eating species to a bird of a nectar-eating species that has the same overall energy requirement would surely show that the seed-eating bird spends more time eating than does the nectar-eating bird, since a given amount of nectar provides more energy than does the same amount of seeds
The argument relies on which one of the following questionable assumptions
(A) Birds of different species do not generally have the same overall energy requirements as each other
(B) The nectar-eating bird does not sometimes also eat seeds
(C) The time it takes for the nectar-eating bird to eat a given amount of nectar is not longer than the time it takes the seed-eating bird to eat the same amount of seeds
(D) The seed-eating bird does not have a lower body temperature than that of the nectar-eating bird
(E) The overall energy requirements of a given bird do not depend on factors such as the size of the bird, its nest-building habits; and the climate of the region in which it lives

选c....求解~~~谢谢!

shaonianhe · 发表于 2011-4-7 22:09:34

需要相同的能量 S鸟比N鸟吃东西的时间要长推出N比S中的能量要多总量=吃的时间X吃的速度X单位S/N中蕴含的能量其中S鸟比N鸟吃的时间要多已经确定如果能知道速度差不多或者至少N不多于S 不就能推出 S单位蕴含的能量要少于N么不就能推出since a given amount of nectar provides more energy than does the same amount of seeds

shaonianhe · 发表于 2011-4-7 22:10:01

饿···我觉得可能会给你越讲越糊涂··

shaonianhe · 发表于 2011-4-7 22:10:44

所以C选项我觉得最合适··

dengts · 发表于 2011-4-7 22:37:48

S-bird and N-bird have the same energy requirement.Besides,a given amount of n provides more energy than does the same amount of seeds.
As a result,S-bird eats More amount of food than N-bird does.
Consequently,S-bird spends more time eating than N-bird only if the former eats a given amount of food at least as fast as the latter.
So C is a questionable assumption.

红红的云 · 发表于 2011-4-8 02:33:58

1.小鸟因为保持体温需要很多能量，所以他们不断的吃。

but 比较吃种子和吃花蜜的两种需要同样能量的小鸟，单位花蜜的能量比单位种子的能量要高，所以吃花蜜的小鸟应该花费更少的时间在吃的上面。结果却是相反，花蜜的小鸟花跟多的时间。
But a comparison of a bird of a seed-eating species to a bird of a nectar-eating species that has the same overall energy requirement would surely show that the seed-eating bird spends more time eating than does the nectar-eating bird, since a given amount of nectar provides more energy than does the same amount of seeds 。

此文是阅读问题。but，，，，， would surely show that。。。。。。意思是比较结果没有show that。。。。。

sdcar2010 · 发表于 2011-4-8 07:13:35

LSAT again.

ruirui_hsu · 发表于 2011-7-13 23:24:15

1.小鸟因为保持体温需要很多能量，所以他们不断的吃。

but 比较吃种子和吃花蜜的两种需要同样能量的小鸟，单位花蜜的能量比单位种子的能量要高，所以吃花蜜的小鸟应该花费更少的时间在吃的上面。结果却是相反，花蜜的小鸟花跟多的时间。
But a comparison of a bird of a seed-eating species to a bird of a nectar-eating species that has the same overall energy requirement would surely show that the seed-eating bird spends more time eating than does the nectar-eating bird, since a given amount of nectar provides more energy than does the same amount of seeds 。

此文是阅读问题。but，，，，， would surely show that。。。。。。意思是比较结果没有show that。。。。。

-- by 会员红红的云 (2011/4/8 2:33:58)

问题应该就是出在这里了。但是还是不知道为什么会这样理解。。。。

but，，，，， would surely show that。。。。。。意思是比较结果没有show that。。。。。求进一步解释..

lafuria · 发表于 2011-7-14 00:21:39

考场上没有时间，应该直接找相关性

有了结论求前提，如果要是正确选项，则肯定得和这两种鸟的比较沾边。

A. different species，不关其他鸟的事，杀
B. 只说了一种鸟，杀
C. 两种鸟说到了，eat也说到了，留着
D. 说两种鸟的温度不一样，说了比较，但是主题是体温，还是无关，杀（D是迷惑选项，就希望你推理从体温-能量-吃）
E. 说能量的需求和后面这么多事无关，显然和主题无关，杀

最后剩下C

如果硬要说C怎么对：两种鸟需要的能量相同，但nectar比seed提供的单位能量高，所以吃n的鸟花在吃的时间比吃seed的鸟多。这个逻辑链条要成立，必须隐含条件“两种鸟吃东西一样快”，就是C。因为“花在吃的时间”和“能获取的能量”之间是有一个logical gap的

求nn相助~

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