18.   Radio interferometry is a technique for studying details of celestial objects that combines signals intercepted by widely spaced radio telescopes. This technique requires ultraprecise timing, exact knowledge of the locations of the telescopes, and sophisticated computer programs. The successful interferometric linking of an Earth-based radio telescope with a radio telescope on an orbiting satellite was therefore a significant technological accomplishment.

Which of the following can be correctly inferred from the statements above?

(A) Special care was taken in the launching of the satellite so that the calculations of its orbit would be facilitated.

(B) The signals received on the satellite are stronger than those received by a terrestrial telescope.

(C) The resolution of detail achieved by the satellite-Earth interferometer system is inferior to that achieved by exclusively terrestrial systems.

(D) The computer programs required for making use of the signals received by the satellite required a long time for development.（E）

(E) The location of an orbiting satellite relative to locations on Earth can be well enough known for interferometric purposes.

题目没怎么看懂，正确选项E也看不出逻辑关系。

请指教，谢谢

This technique requires........ exact knowledge of the locations of the

telescopes

18.   Radio interferometry is a technique for studying details of celestial objects that combines signals intercepted by widely spaced radio telescopes. －－这句话就是说，RI是个什么东西。

This technique requires ultraprecise timing, exact knowledge of the locations of the telescopes, and sophisticated computer programs. －－这句话说，这个技术需要什么

The successful interferometric linking of an Earth-based radio telescope with a radio telescope on an orbiting satellite was therefore a significant technological accomplishment.－－－这句重点，说一个linking是significant technological accomplishment。一看是an Earth-based radio telescope with a radio telescope on an orbiting satellite 。即地球上的望远镜和轨道上的望远镜是有联系的。而且这样的联系是重要的科技成就。

问infer

一定是关于RI的。只有E了

A说care，B说信号，C说哪个比哪个差一点，D电脑程序需要长时间的研发。都是莫名奇妙的啊。只有E提到了interferometry。大家想啊，这RI都是一个科技成就了，而这成就就是地球上望远镜的位置和天上望远镜之间的联系达到的，那么E也就自然而然啦，地上的相对于天上的位置就可以很容易且充分的得知啦