标题: 2017OG CR 疑问 [打印本页] 作者: Sunsunshine 时间: 2016-10-27 21:11 标题: 2017OG CR 疑问 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 reflection 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 telescope launched into extremely high orbits around the Earth
(E) a great increased number of small particles in Earth’s orbit would result in a blanket of reflections that would make certain valuable telescope observations impossible
这道题在2016OG里也有啦~
重新看OG的时候 对于D选项突然产生了疑问
原文的方案目的是：eliminate interference（也就是根除！消灭！）
D选项说了 你唯一想达到这个目的的方法是使用“发射很远的telescope” 所以我把它理解为了：你怎么explode都没用，即使你都explode的了，你用的不是发射很远的telescope也白搭（相当于人家要的白菜，你非要给萝卜），所以方案是ill conceived的
这样的理解哪里错了呢？
楼主跑去看OG解释，结果OG对于D选项的解释：This is not a cogent reason for thinking the proposal to be ill-conceived. Even if the proposal will not eliminate all interference with ground based telescopes, it might still greatly reduce interference.
？？？大幅减少了interference，没有eliminate，那这个proposal不就是ill-conceived的吗(因为没有达到目的--- eliminate)？OG为什么会这么解释啊？D选项到底出错在哪里呢？
