学位英语

第5部分：补全短文(第46～50题，每题2分，共10分)

下面的短文有5处空白，短文后有6个句子，其中5个取自短文，请根据短文内容将 其分别放回原有位置，以恢复文章原貌。

Reinventing the Table

An earth scientist has rejiggedthe periodic table to make chemistry simpler to teach to students. 46ButBruce Railsback from the University of Georgia says he is the first to create atable that breaks with tradition and shows the ions of each element rather thanjust the elements themselves.

"I got tired of breaking myarms trying to explain the periodic table to earth students," he says,criss-crossing his hands in the air and pointing to different bits of atraditional table.47But he has added contour lines to chargedensity, helping to explain which ions react with which.

"Geochemists just want anintuitive sense of what's going on with the elements," says Albert Galyfrom the University of Cambridge.48

49He explains that sulphur, for example,shows up in three different spots one -- for sulphide, which is found inminerals, one for sulphite, and one for sulphate, which is found in sea slat,for instance.

He has also included symbols toshow which ions are nutrients, and which are common in soil or water.50

A. There have been many attemptsto redesign the periodic table since Dmitri Mendeleev drew it up in 1871.

B.Railsback has still ordered the elements according to the number of protonsthey have.

C."1 imagine this would be good for undergraduates. "

D. Railsbackhas listed some elements more than once.

E. Andthe size of element's symbol reflects how much of it is found in the Earth'scrust.

F. Thetraditional periodic table was well drawn.

参考答案：

46.【答案】A

【解析】空格前讲到一个科学家重新设置了元素周期表，以便于教学。空格处就

应该顺承上一句的语意：有很多次重新设置元素周期表的努力。因此A选项是正确答案。

47.【答案】B

【解析】空格前讲到BruceRailsback一直宣称他是第一个与传统有所不同的人.空格就应开始讲他是如何进行改变的。空格后but表示转折，表示他对传统周期表突破之处，因此空格处用B选项(他仍然用元素含有的质子数量来给元素排序)，与后面的语意才一致。

48.【答案】C

【解析】空格前描述的是来自剑桥大学的教授对这一革新的评论，第一段中讲到如此革新是为了便于教学，因此该处的空格填入与教学相关的内容才能更好地呼应。故本题填入C选项(这对本科生是有好处的)是正确答案。

49.【答案】D

【解析】空格后的例子是为了证明Railsback对同一元素的不同状态的不同命名，因此D选项(Railsback不止一次地列举了某些元素)是正确答案。

50.【答案】E

【解析】空格前讲到Railsback还包含了一些symbol(符号)，空格处(本文的最后一句话)必须与前一句有所呼应，因为此处已经没有下文了，故E选项(元素符号的大小也说明了在地壳中找到的数量大小)是正确答案。

编辑推荐：

2015年职称英语考试合格证书领取时间汇总

2016年职称英语考试网络辅导

（责任编辑：vstara）

共2页,当前第1页  第一页  前一页  下一页