GWD-10-15

wwwhahchn

PDF的，只好手打了

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 seriouly 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 nonfuctioning satellites by exploding them in space. This proposal, however, is ill conceived, since        .

A. many nonfunctioning satellites remain in orbit for years

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

C. there are no known previous instances of satellites' having been exploded on purpose

D. 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

E. 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

请问这句话：

the proposal has recently been made to eliminate interference from nonfuctioning satellites by exploding them in space

highlight的地方可以看作是这个proposal的目的吗？？

如果是，E就显得与这个目的无关

如果不是，那这个proposal的目的是什么？？

nickt

是小目的,大目的是--改变"the large satellites interfere more seriouly with telescope observations "

wwwhahchn

谢谢nickt！！

不过我觉得文章暗含的意思是这个proposal的“大目的”是“消除对telescope observation的坏影响的大部分”，因为大部分的影响来自于the large satellites

但是这个目的文章中并没有明确地写出来，能看清楚的只有你说的“小目的”——to eliminate interference from nonfuctioning satellites。根据这个目的来看，我觉得E是无关选项

E只和“大目的”有关，但是“大目的”是自己推出来的，可以这样解题吗？？

盼NN回复

lismiles

虽然人造卫星的数量比在同一轨道的碎片少，但人造卫星严重干扰太空望远镜的观测，因为它产生大量的反射。由于很多这种卫星已经停止工作了，一项提议指出应通过在太空引爆的方式消除不工作卫星的干扰，但这种提议欠考虑，因为

E. 很多在轨道中增加的小颗粒也导致一层反射，使有价值的观测变得不可能。

说明这种引爆不工作卫星的方式不能达到预期较少反射的效果。

wwwhahchn

以下是引用lismiles在2005-9-1 11:36:00的发言：

虽然人造卫星的数量比在同一轨道的碎片少，但人造卫星严重干扰太空望远镜的观测，因为它产生大量的反射。由于很多这种卫星已经停止工作了，一项提议指出应通过在太空引爆的方式消除不工作卫星的干扰，但这种提议欠考虑，因为

E. 很多在轨道中增加的小颗粒也导致一层反射，使有价值的观测变得不可能。

说明这种引爆不工作卫星的方式不能达到预期较少反射的效果。

Got it!!Thank you!!