2道逻辑真题请教，support类型

albert

以下是引用thinkpad在2003-7-17 14:42:00的发言：
1. Despite the approach of winter, oil price to industrial cutomers are exceptionally low this year and likely to remain so. Therefore, unless the winter is especialy severe, the price of natural gas to industrial customers is also likely to remain low.

Which of the following, if true, provides the most support for the conclusion above?

a) Long-term weather forecasts predict a mild winter.
b) The industrial users who consume most natural gas can quickly and cheaply switch to using oil instead.
c) The largest sources of supply for both oil and natural gas are in subtropical regions unlikely to be affected by winter weather.
d) The fuel requirements of industrial users of natural gas are not seriously affected by the weather.
e) Oil distribution is more likely to be affected by severe winter weather than is the distribution of natural gas.

问题：这道题我选了e, 和新东方给的答案不同。请大家指正我的错误。为了不干扰大家的思路，我先不说新东方的答案。


2. Caterpillars of all species produce an identical hormone called 'juvenile hormone' that maintains feeding behavior. Only when a caterpillar has grown to the right size for pupation to take place does a special enzyme halt the production of juvenile hormone. This enzyme can be synthesized and will on being ingested by immatune caterpillars, kill them by stopping them from feeding.

Which of the following, if true, most strongly supports the view that it would not be advisable to try to eradicate agricultral pests that go through a caterpillar state by spraying croplands with the enzyme mentioned above?

a) Most species of caterpillar are subject to some natural predation.
b) Many agricultural pests do not go through a caterpillar state.
c) Many agriculturally beneficial insects go through a caterpillar state.
d) Since caterpillars of different species emerge at different times, several sprayings would be necessary.
e) Although the enzyme has been synthesized in the laboratory, no large-scale production facilites exist as yet.

我想选e，同样和新东方答案不同，请大家说说我这道题又是哪里想的不对？

[此贴子已经被作者于2003-7-17 14:45:23编辑过]

question 1,
choice E is out of scope, because in the conclusion, the arguer has narrowed the scope to a " not especialy severe cold winter"...

blueeyes

我认为逻辑解题的关键是在读出原题的含义，要不然就会自己联想很多，比如第一题原文强调的是价格低，那么就丛选项中找出强调价格低的，所以是B，原题没说的就不要多想

含草舵手

B simply says that the course of action may not be enough, as it won't kill other pests. But it still does not say why it would be wrong to use the enzyme t kill those pests that do go through caterpillar stage - for these pests, the enzyme will get the job done.
B是不正确的，因为问题问的是用喷射酶来消灭经历毛虫阶段的害虫为何不可取，而B说很多害虫不经历毛虫阶段，那对那些经历毛虫阶段的害虫究竟如何仍然只字未提。

C gives you the "don't do it" reason: you're also killing off the good insects as well."don't do it" 的方向就是如果这么干会带来什么不利。

D说得进行若干次喷射，但也没说为何不能喷射

E说实验室生产出来但未大规模生产，同样没说为何不能喷射

一定要抓住问题的关键——用喷射酶来消灭经历毛虫阶段的害虫为何不可取？