GWD 10 - 15 KEY is A， but why?

dingrhan

GWD10 -15， 答案是A， 但是为什么呢？D为何不行？ A如何reasoning的呢？

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10 - Q15:

Which of the following most logically completes the argument below?

Although the number of large artificial satellites orbiting the Earth is small compared to the number of small pieces of debris in orbit, the large satellites interfere more seriously with telescope observations because of the strong reflections they produce.  Because many of those large satellites have ceased to function, the proposal has recently been made to eliminate interference from nonfunctioning satellites by exploding them in space.  This proposal, however, is ill conceived, since _______.

many nonfunctioning satellites remain in orbit for years

for satellites that have ceased to function, repairing them while they are in orbit would be prohibitively expensive

there are no known previous instances of satellites’ having been exploded on purpose

the only way to make telescope observations without any interference from debris in orbit is to use telescopes launched into extremely high orbits around the Earth

a greatly increased number of small particles in Earth’s orbit would result in a blanket of reflections that would make certain valuable telescope observations impossible

oookk

what? the answer is A? doubt

i would pick E=====you can refer "exploding them in space" to E's "number of small particles "

D=="the only way to ",this expression should be avoided and cannot be the answer.moreover, there is no relatiosip between the proposal cited in the passage and D''s "to use telescopes launched into extremely high orbits around the Earth"

dingrhan

I also choose E. But don't know why the key is A. who knows why A?

dingrhan

所以，这题目的答案错了？！ 应该是E？！

梦精灵_Fly

E

dingrhan

嘿嘿，那就选E吧 - 考试时。似乎大家没什么异议了

hmm

我这儿的答案是E

dingrhan

好，就E了！