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
5
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
—Mom,canyouraisemyallowance?—______—Allmyfriendsgetbiggerallowances
那是一个互联网信息泥沙俱下的时代。海量的文献和图文资料从纸张、胶片化身为电子数据
大咯血窒息抢救措施应包括()A.仰卧头低脚高位 B.清除口腔血凝块和血液
施工机械选择的一般原则不包括()。A、适用性、先进性 B、通用性、专用性
督脉的生理作用主要是A.调节阳经经气 B.调节督脉、任脉 C.总调奇经八脉
房地产经纪行业自律组织可以()。(2010年真题)A.履行行政管理的职责
下列哪项不符合慢性缺铁性贫血的实验室检查结果?( )A.血清铁蛋白降低 B.
下列不属于劳动争议处理的基本原则的是( )。A.合法的原则 B.公正的原则
下列关于第三代头孢菌素的特点描述错误的是A、对革兰阴性菌有较强的作用 B、对多
(2019年真题)某金属冶炼厂发生一起火灾事故,当场造成2人死亡、1人重伤、3人
最新回复
(
0
)