课程咨询
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:合金组成

2017-04-10 09:18:00来源:新东方在线整理

  GRE阅读题目解析:合金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:合金答案见下一页,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:合金

  P2

  Calculations of the density of alloys based on Bernal-type models of the alloy‘s metal component agreed fairly well with the experimentally determined values from measurements on alloys consisting of a noble metal together with a metalloid, such as alloys of palladium and silicon, or alloys consisting of iron, phosphorus, and carbon, although small discrepancies remained. One difference between real alloys and the hard spheres used in Bernal models is that the components of an alloy have different sizes, so that models based on two sizes of spheres are more appropriate for a binary alloy, for example. The smaller metalloid atoms of the alloy might fit into holes in the dense, random-packed structure of the larger metal atoms.

  4. The author's speculation about the appropriateness of models using spheres of two sizes for binary alloys would be strongly supported if models using spheres of two sizes yielded

  ○A values for density identical to values yielded by one-sphere models using the smaller spheres only

  ○B values for density agreeing nearly perfectly with experimentally determined values

  ○C values for density agreeing nearly perfectly with values yielded by models using spheres of three sizes

  ○D significantly different values for density depending on the size ratio between the two kinds of spheres used

  ○E the same values for density as the values for appropriately chosen models that use only medium-sized spheres

  点击下一页查看答案:

本文关键字: GRE阅读 GRE阅读真题

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
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>>
更多>>
更多资料