课程咨询

GRE首页 GRE课程 GRE动态 0元讲座 GRE模考网站

新东方在线 > GRE > GRE阅读 > 正文
扫码关注掌握一手留学资讯

扫码关注掌握一手留学资讯

回复XDF免费领

水平测试和备考资料

扫码关注公众号

GRE阅读题目解析:不规则无球粒陨石

2016-12-22 09:57:00来源：网络

　　【GRE阅读题目解析:不规则无球粒陨石】GRE考试考什么？GRE阅读是重点。新东方在线GRE频道为大家带来GRE阅读题目解析:不规则无球粒陨石，答案见下一页，希望对大家GRE备考有所帮助。更多精彩尽请关注新东方在线GRE频道!

　　查看全部：GRE阅读答案解析(汇总)

　　GRE阅读题目解析:不规则无球粒陨石

　　P2

　　Shergottites, the name given to three anomalous achondrites (igneous meteorites lacking chondrules) so far discovered on Earth, present scientists with a genuine enigma.

　　Shergottites crystallized from molten rock less than 1.1 billion years ago (some 3.5 billion years later than typical achondrites) and were presumably ejected into space when an object impacted on a body similar in chemical composition to Earth.

　　While some scientists speculate that shergottites derive from Io (a volcanically active moon of Jupiter), recent measurements suggest that since Io‘s surface is rich in sulfur and sodium, the chemical composition of its volcanic products would probably be unlike that of the shergottites.

　　Moreover, any fragments dislodged from Io by interbody impact would be unlikely to escape the gravitational pull of Jupiter.

　　The only other logical source of shergottites is Mars.

　　Space-probe photographs indicate the existence of giant volcanoes on the Martian surface.

　　From the small number of impact craters that appear on Martian lava flows, one can estimate that the planet was volcanically active as recently as a half-billion years ago—and may be active today. (178 words)

　　3. The passage provides information to answer which of the following questions?

　　(A) What is the precise age of the solar system?

　　(B) How did shergottites get their name?

　　(C) What are the chemical properties shared by shergottites and Martian soils?

　　(D) How volcanically active is the planet Jupiter?

　　(E) What is a major feature of the Martian surface?

　　For the following question, consider each of the choices separately and select all that apply

　　4. It can be inferred from the passage that each of the following is a consideration in determining whether a particular planet is a possible source of shergottites that have been discovered on Earth

　　A strength of the planet‘s field of gravity

　　B proximity of the planet to its moons

　　C chemical composition of the planet‘s surface

　　点击下一页查看答案：

本文关键字: GRE阅读 GRE阅读真题

上一页 1 2 下一页

添加新东方美研助教回复【GRE】获取

模考真题|写作题库|阅读机经|佛脚词汇

更多资料

添加美研助教号，
回复【GRE】获取备考必看资料包

  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加美研助教号】，回复对应关键字领取学习资料。
更多>>
更多内容

关注新东方美研助教

回复【GRE】获取备考必看资料包

新东方美研备考资料
GRE录播课（全科班/单项班） GMAT6-8人直播VIP小班 托福直播精讲班（30天/60天）
更多>>
更多惊喜>>

添加美研助教号，
回复【GRE】获取备考必看资料包

  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加美研助教号】，回复对应关键字领取学习资料。
更多>>
更多资料
我要
反馈 返回
首页
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10