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
10
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
distinguished
解析
句意:在临界点之上时,气体和液体就很难再区分开来。
转载请注明原文地址:https://tihaiku.com/zcyy/3710083.html
相关试题推荐
______referstosomecontrastordiscrepancybetweenappearanceandreality.A、Al
Parentsoftenfacedthe______betweendoingwhattheyfeltwasgoodforthedeve
Inahot,sunnyclimate,manacclimatizesbyeatingless,drinkingmoreliquids,
[img]2018m1x/ct_eyyjsbz2016j_eyyjsbreadd_0150_201712[/img]Itisobvioustha
The______talksbetweenChinaandtheUnitedStateswerethebaseofthelaterag
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicand
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicand
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicand
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicand
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicand
随机试题
Oneofthegoodthingsformeninwomen’sliberationisthatmennolongerh
HowcanthetouristsrelaxinSanya?Theycansitbybeachand______.[br][ori
IBMresearchersareattemptingtowarmuphuman-computerrelationships.For
不利的物质条件通常是指()。A:非自然的物质障碍和污染物 B:国家政策、法律
税收法律是指由全国人大及其常委会制定的有关税收分配活动的法律制度。有关税收法律创
人在每一瞬间,将心理活动选择了某些对象而忽略了另一些对象。这一特点指的是注意的(
中药蟾酥强心作用的有效成分是()A.吲哚碱类 B.肾上腺素 C.有机酸
在责任成本管理体制下,下列关于成本中心的说法错误的有( )。A.成本中心对责任
检测回路模拟试验的计量单位是()。A.台 B.个 C.套 D.
制订劳动卫生标准的基本原则是( )。A.保证所有劳动者的身体健康 B.保证敏
最新回复
(
0
)