233网校- 英语六级英语六级

报考
您现在的位置:233网校 >> 英语六级考试 >> 模拟试题 >> 文章内容

2017年6月大学英语六级阅读单项冲刺练习(9)

2017年5月29日来源:233网校评论
导读:

  以下2017年6月大学英语六级阅读单项冲刺练习汇总由233网校英语六级考试频道为您提供,希望对您有所帮助。>>>快速拿下英语六级阅读方法 手机题库下载

  点击查看:2017年6月大学英语六级阅读单项冲刺练习汇总

  The difference between a liquid and a gas is obvious under the conditions of temperature and pressure commonly found at the surface of the Earth. A liquid can be kept in an open container and fill it to the level of a free surface. A gas forms no free surface but tends to diffuse throughout the 11 available; it must therefore be kept in a closed container or held by a gravitational field, as in the 12 of a planet's atmosphere. The distinction was a 13 feature of early theories describing the phases of matter. In the nineteenth century, for example, one theory maintained that a liquid could be "dissolved" in a vapor without losing its identity, and another theory 14 that the two phases are made up of different kinds of molecules. The theories now prevailing take a quite different approach by emphasizing what liquids and gases have in 15 They are both forms of matter that have 6 structure, and they both flow readily.

  The fundamental similarity of liquids and gases becomes clearly apparent when the temperature and pressure are 17 somewhat. Suppose a closed container 18 filled with a liquid is heated. The liquid expands, or in other words becomes less dense; some of it evaporates. In contrast, the vapor above the liquid surface becomes denser as the evaporated molecules are 19 to it. The combination of temperature and pressure at which the densities become 20 is called the critical point.

  A. added

  B. case

  C. prominent

  D. held

  E. equal

  F. partially

  G. example

  H. previous

  I. space

  J, lifted

  K. permanent

  L. particularly

  M. extended

  N. raised

  0. common

  II. I 12. B 13. C 14. D 15. O 16. K 17. N 18. F 19. A 20. E

  小编推荐:

  英语六级在线题库

  英语六级阅读常考高频词汇

责编:wxx  评论  纠错

课程免费试听
课程专业名称 讲师 原价/优惠价 免费体验 报名
英语六级取证班(听力+写作+阅读+语词翻译) 丁雪明 ¥199 / ¥199 报名