93年2月gre考试阅读真题解析(A)-智课教育旗下智课教育.pdf

智 课 网 G R E 备 考 资 料 93年2月gre考试阅读真题解析(A)-智课教育旗下智课教 育 新gre考试阅读中对于逻辑题的考生是一个重点，但真题也不容错 过。复习gre考试阅读的时候，gre考生应该以往年的真题为复习材料， 从真题中总结阅读规律和特点才是制胜法宝。 新gre考试阅读中对于逻辑题的考生是一个重点，但真题也不容错 过。接下来的几天给大家整理了历届gre考试阅读真题及解析，下面这 篇是1993年2月gre考试阅读真题SECTION A部分。复习gre考试阅读 的时候，gre考生应该以往年的真题为复习材料，从真题中总结阅读规 律和特点才是制胜法宝。 It is now established that the Milky Way is far more extended and of much greater mass than was hitherto thought. However, all that is visible of the constituents of the Milky Way’s corona (outer edge), where much of the galaxy’s mass must be located, is a tiny fraction of the corona’s mass. Thus, most of the Milky Way’s outlying matter must be dark. Why? Three facts are salient. First, dwarf galaxies and globular clusters, into which most of the stars of the Milky Way’s corona are probably bound, consist mainly of old stars. Second, old stars are not highly luminous. Third, no one has detected in the corona the clouds of gaseous matter such as hydrogen and carbon monoxide that are characteristic of the bright parts of a galaxy. At present, therefore, the best explanation—though still quite tentative—for the darkness of the corona is that the corona is composed mainly of old, burned-out stars. 17. The passage as a whole is primarily concerned with (A) analyzing a current debate (B) criticizing a well-established theory (C) showing how new facts support a previously dismissed hypothesis (D) stating a conclusion and adducing evidence that may justify it (E) contrasting two types of phenomena and showing how they are related 18. According to the passage, a bright part of a galaxy typically includes (A) dwarf galaxies and clusters of stars (B) a balanced mixture of old and new stars (C) a large portion of the galaxy’s mass (D) part of the corona of the galaxy (E) gases such as hydrogen and carbon monoxide 19. It can be inferred from the passage that, compared with what they now think, until fairly recently astronomers believed that the Milky Way (A) was much darker (B) was much smaller (