请教OG-32，OG-48

boxxzzy

32. A recent spate of launching and operating mishaps with television satellites led to a
corresponding surge in claims against companies underwriting satellite insurance. As a result,
insurance premiums shot up, making satellites more expensive to launch and operate. This, in
turn, has added to the pressure to squeeze more performance out of currently operating
satellites.
Which of the following, if true, taken together with the information above, best supports the
conclusion that the cost of television satellites will continue to increase?
A. Since the risk to insurers of satellites is spread over relatively few units, insurance
premiums are necessarily very high.
B. When satellites reach orbit and then fail, the causes of failure are generally impossible to
pinpoint with confidence.
C. The greater the performance demands placed on satellites, the more frequently those
satellites break down.
D. Most satellites are produced in such small numbers that no economies of scale can be
realized.
E. Since many satellites are built by unwieldy international consortia, inefficiencies are
inevitable.

C项到底在说一个什么意思？？是对satellites要求有更好的表现，satellites会更多的break down？？什么逻辑？？



48. A researcher discovered that people who have low levels of immune-system activity tend
to score much lower on tests of mental health than do people with normal or high
immune-system activity. The researcher concluded from this experiment that the immune
system protects against mental illness as well as against physical disease.
The researcher’s conclusion depends on which of the following assumptions?
A. High immune-system activity protects against mental illness better than normal
immune-system activity does.
B. Mental illness is similar to physical disease in its effects on body systems.
C. People with high immune-system activity cannot develop mental illness.
D. Mental illness does not cause people’s immune-system activity to decrease.
E. Psychological treatment of mental illness is not as effective as is medical treatment.

题目只说从低的免疫系统程度会有低的mantal healthy，得出免疫系统能免疫mantal illness，但为什么depand on D呢？？看了OG的解释依然不懂？？

snow_mountain

32. 你没完全看懂题目吧。 文中. 说This, in turn, has added to the pressure to squeeze more performance out of currently operating satellites.  所以D就是对的。 就好像本来10个人干的活，现在叫5个人干，那5个人当然容易吃不消了。

48。 这是典型的 A causes B.    assumption： 不是B causes A 的题型。做多了就明白了。

boxxzzy

谢谢NN啦！！！！～～～～～～～～～～～～～～～～～～～

snow_mountain

以下是引用boxxzzy在2004-2-2 10:22:00的发言：
谢谢NN啦！！！！～～～～～～～～～～～～～～～～～～～

小飞这样叫压力太大了。

liu_9000

我不知道我的这个问题有没人愿意回答

32.题

答案C导致要发射更多的satellites, 但发射satellites多,mishap绝对数当然会增加,但失败比例应该不变吧? 保险公司是根据失败次数还是失败率来增加premiums?

选项B, "the causes of failure are generally impossible to pinpoint"暗示不能通过改进技术来减少mishap吗?

谢谢

leeon

B中应该是说导致卫星故障的原因通常是不可能查明确定的，和题干要支持的结论电视卫星的费用持续增加没有关系。c中说更多的性能要求放置到卫星上，就会导致更多的事故。事故多的话应该是保险费上升，cost就增加了。

liu_9000

谢谢leeon, 我题干看差了, insurers underwrite launching and operating of satellites; 所以C项的satellites break down frequently (operating)直接就导致premium high, 不需要等到launching失败才导致premium high.

但: OG解释说B项支持费用不变: the impossibility of pinpointing the causes of failure, metioned in B, is consistent with the cost of satellites remaining stable. 我想问的是B项如何与费用稳定一致?   

[此贴子已经被作者于2004-5-30 13:54:46编辑过]

scots

BTW，跟48题类似的还有OG的137题，体会一下，就明白了！

按我自己给这种题按了一个大白话的解释——原题意是要在低免疫系统和低精神健康两个相联系的指标中，建立因果推导关系。所以假设其中一个推导方向不能成立是建立另一个方向的推导成立的前提（好象这话说得太绕了，将就着看吧……希望对你有帮助哦！）

liu_9000

热心的scots MM, 这是个2月份的旧帖, 被我翻出来问32题的B选项.

楼主说不定早功成身退了. 我替他谢谢你了.

hanson_luo

OG32我也有点想不通，我觉得A和D都有道理：

如D：不能大批量生产从而没有规模效益难道不是卫星成本高的一个前提吗？对D取非，如果可以实现规模效益，那卫星的成本不就不会上升了吗？

如A：由于保费很高，占卫星成本比重大，这样保费的增加（由于事故增加）才会导致卫星整个成本上升。否则如果保费占卫星成本很小的话，那保费的增加应该不会导致卫星成本的相应增加了。