GMAT考试资料：GWD试题合集（四十一）.

　　以下将为正在备战GMAT考试的同学们整理一些经典的GMAT阅读试题，并分多个合集推出，希望能够为正在备考GMAT考试的考生提供或多或少的帮助。

　　23. GWD-17-Q35-Q37 月球表面的洞

　　(This passage was excerpted from material

　　published in 1996.)

　　When a large body strikes a planet

　　or moon, material is ejected, thereby

　　creating a hole in the planet and a local

　　Line dicit of mass. This dicit shows up

　　(5) as a gravity anomaly: the removal of

　　the material that has been ejected to

　　make the hole results in an area of

　　slightly lower gravity than surrounding

　　areas. One would therore expect that

　　(10) all of the large multi-ring impact basins

　　on the surface of Earth’s Moon would

　　show such negative gravity anomalies,

　　since they are, essentially, large holes

　　in the lunar surface. Yet data collected

　　(15) in 1994 by the Clementine spacecraft

　　show that many of these lunar basins

　　have no anomalously low gravity and

　　some even have anomalously high

　　gravity. Scientists speculate that early

　　(20) in lunar history, when large impactors

　　struck the Moon’s surface, causing

　　millions of cubic kilometers of crustal

　　debris to be ejected, denser material

　　from the Moon’s mantle rose up

　　(25) beneath the impactors almost imme-

　　diately, compensating for the ejected

　　material and thus leaving no low gravity

　　anomaly in the resulting basin. Later,

　　however, as the Moon grew cooler

　　(30) and less elastic, rebound from large

　　impactors would have been only partial

　　and incomplete. Thus today such

　　gravitational compensation probably

　　would not occur: the outer layer of

　　the Moon is too cold and stiff.

　　以上就是本期GMAT试题的所有内容，考生可以此为据并进行针对性的练习，逐步掌握GMAT阅读的解题规律及技巧，以达到迅速提高GMAT考试成绩的目的。 相关链接：

1.GMAT考试资料：GWD试题合集（四十）

2.GMAT考试资料：GWD试题合集（三十九）

3.GMAT考试资料：GWD试题合集（三十八）

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