57. Once positioned in space, the Hubble Space Telescope will capture light from sources twenty times fainter compared to those that can be detected by ground-based instruments.问
(A) compared to those that can b detected
(B) compared to those they can detect
(C) than that can be detected
(D) than those that can be detected（D）D is best. those 指代sources
(E) than those detecting
怎么than后面不能指代light呢？感觉说faint的应该是light而不是resources啊，因为光可以说暗淡啊，怎么resources呢？
所以C不可以？
1) sources can be refer to an astro-body which can be modified by bright or faint
2) than should followed by a plural noun or pronoun in order to fit save level comparision, I don't think that can be used as plural noun
hope that helps
| 欢迎光临 ChaseDream (https://forum.chasedream.com/) | Powered by Discuz! X3.3 |