首页
登录
职称英语
The difference between a liquid and a gas is obvious【66】the conditions of te
The difference between a liquid and a gas is obvious【66】the conditions of te
游客
2024-08-07
22
管理
问题
The difference between a liquid and a gas is obvious【66】the conditions of temperature and pressure commonly found at the surface of the Earth. A liquid can be kept in an open container and f【67】it to the level of a free surface. A gas forms no free surface but tends to diffuse throughout the space available ; it must【68】be kept in a closed container, as in the【69】of a planet’s atmosphere. The distinction was a prominent feature of early theories【70】(describe) 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 held that the two phases are made up of different kinds of molecules (分子). The theories now prevailing t【71】a quite different approach by emphasizing【72】liquids and gases have in common. They are both forms of matter【73】have no permanent structure, and they both flow easily. They are fluids.
The f【74】similarity of liquids and gases becomes clearly apparent when the temperature and pressure are raised somewhat. S【75】a closed container partially filled with a liquid is heated. The liquid expands, or in other【76】, becomes less dense; some of it evaporates. In contrast, the vapor above the liquid surface becomes dense as the evaporated molecules are added【77】it. The combination of temperature and pressure【78】which the densities become equal is c【79】the critical point. Above the critical point the liquid and the gas can no longer be dis【80】; there is a single, undifferentiated fluid phase of uniform density. [br]
选项
答案
at
解析
句意:使液体和气体密度相同的那个状态下的温度和压力被称作临界点。句中的temperature and pressure是先行词,需要一个关系词引导一个定语从句修饰先行词。特定数值的temperature和pressure与at搭配,意为“在某个温度和压力下”。
转载请注明原文地址:https://tihaiku.com/zcyy/3710081.html
相关试题推荐
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicand
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicand
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicand
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicand
Collisionbetweenanaircraftandoneormorebirdsistermedabird-strike.
Collisionbetweenanaircraftandoneormorebirdsistermedabird-strike.
Collisionbetweenanaircraftandoneormorebirdsistermedabird-strike.
The______talksbetweenChinaandtheUnitedStateswerethebaseofthelaterag
Collisionbetweenanaircraftandoneormorebirdsistermedabird-strike.
Collisionbetweenanaircraftandoneormorebirdsistermedabird-strike.
随机试题
[originaltext]W:MymothertoldmetokeepawayfromtheswimmingpoolM:Dids
[originaltext]W:David,there’snotmuchleftintherefrigerator.Imightbea
Forthispart,youareallowed30minutestowriteanessaybasedonthepict
二月革命后,为俄国无产阶级革命奠定思想理论基础的文献是()。A.《四月提纲》和
A.寒湿 B.痢疾 C.黄疸 D.霍乱 E.湿热大便黄褐如糜而臭多属
直接显微镜观察衣原体上皮细胞包涵体的首选染色方法A.Giemsa染色B.革兰染色
左图为两个圆锥的组合体,从任意面剖开,右边哪一项可能是它的截面图? A.如上图
本人或监护人提出申请城乡特殊困难未成年人教育救助后,由()调查核实。A.乡
一般资料:求助者,男性,19岁,大学一年级学生。 求助者自述:近两个月来,严重
根据《中华人民共和国消费者权益保护法》,提供商品和服务的经营者应当承当的义务包括
最新回复
(
0
)