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[GRE阅读] GRE阅读原题300篇,有答案哦!!!

 
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发表于 2017-12-28 16:16:22 | 显示全部楼层
PRIORITY 1
LEVEL 2
1.  Scientists previously believed that the
Scientists previously believed that the rocky planets—Earth, Mercury, Venus, and Mars—were generated by the
quick gravitational collapse of a dust cloud, a deflation giving rise to a dense orb. That point was challenged in the
1960s, when studies of Moon craters suggested that these craters were caused by the impact of objects that were in
great abundance about 4.5 billion years ago but whose number seemed to have rapidly reduced shortly thereafter.
This observation revitalized Otto Schmidt’s 1944 theory of accretion. According to this theory, cosmic dust steadily
lumped into ever-larger conglomerates: particulates, gravel, small and then larger balls, planetesimals (tiny planets),
and, ultimately, planets. As the planetesimals turned larger, their numbers reduced. Consequently, the number of
collisions between planetesimals decreased.   
1.  The passage provides evidence that Schmidt would be likely to disagree with the theory presented in the first
sentence over
A.  the length of time it took for the rocky planets to form.
B.  the most likely causes of the Moon’s impact craters.
C.  the importance of cosmic dust as a seminal material in planetary formation.
2.  Which of the following best describes the “observation” (line 6) referred to in the passage?  
A.  The rocky planets were created by the rapid gravitational collapse of a dust cloud.
B.  Certain features on the Moon’s surface are impact craters caused by collisions with objects such as
planetesimals.
C.  The rocky planets were formed by a slow accretion of cosmic dust into increasingly larger bodies.
D.  The number of objects colliding with the Moon appears to have been high for a while and then rapidly
diminished.
E.  There are far fewer planetesimals in existence today than there were about 4.5 billion years ago.
【10201】

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发表于 2018-1-7 19:42:35 | 显示全部楼层
hahahahahhaahha
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发表于 2018-2-8 22:24:40 | 显示全部楼层
Thank you~
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发表于 2018-5-22 19:03:53 | 显示全部楼层
哈哈哈哈哈哈哈哈或或或或或不不
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发表于 2018-6-28 21:46:03 | 显示全部楼层
There are far fewer planetesimals in existence today than there
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发表于 2018-6-30 21:19:00 | 显示全部楼层
谢谢楼主
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发表于 2018-7-13 17:02:03 | 显示全部楼层
没有见过这么整齐的十五字啊,下载资料是王道
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发表于 2018-7-13 17:48:32 | 显示全部楼层
66666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666
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发表于 2018-9-9 09:36:00 来自手机 | 显示全部楼层
谢谢!!!!!
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发表于 2018-10-5 13:54:06 | 显示全部楼层
thank you, hahahahaha
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