2017年6月英语六级阅读冲刺提分训练(八十)
时间:2017-05-27 来源:文都网校 浏览:2017年6月英语六级冲刺备考阶段来啦!在2017年上半年英语六级备考中,英语六级阅读很重要,需要各位考生花更多的时间去练习,下面是小编给大家提供的英语六级考试阅读冲刺练习,希望能够帮到大家!
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 no 16 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
11. I 12. B 13. C 14. D 15. O 16. K 17. N 18. F 19. A 20. E
英语六级冲刺阶段,各位朋友一定要加油哦!文都小编提醒各位考生能在考前抓住有效时间进行复习,最后,文都网校四六级频道祝各位六级复习顺利!
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