ChaseDream

标题: 求教 GWD-10-Q15 [打印本页]

作者: lakeDZ    时间: 2008-9-20 20:01
标题: 求教 GWD-10-Q15

 

GWD-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 _______.

 

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

谁能帮我讲解一下这道题的思路,答案选E  谢谢!


作者: magic3140    时间: 2009-8-3 19:13
up
作者: jennyzhu    时间: 2010-11-16 11:03
爆炸的话会让地球轨道出现很多小的爆炸微粒,这些微粒会导致一层厚的反射影像,会让有价值的观察变得不可能。
作者: wang1502    时间: 2010-11-17 05:29
本来是要减少反射   炸掉之后  反射的更多了  所以驳斥
作者: nrfujian    时间: 2010-11-17 11:05
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 _______.

数量上large artificial satellites 没有small pieces of debris多,但large artificial satellites 干扰能力更强。所以想炸掉satellite,目的是降低干扰。但炸掉satellite同时会产生新的debris。无法比较增多了的debris的干扰能力和satellite的干扰能力,从而ill conceived




欢迎光临 ChaseDream (https://forum.chasedream.com/) Powered by Discuz! X3.3