首页
登录
职称英语
The difference between a liquid and a gas is obvious【C1】______the conditions
The difference between a liquid and a gas is obvious【C1】______the conditions
游客
2023-10-13
12
管理
问题
The difference between a liquid and a gas is obvious【C1】______the conditions of temperature and pressure commonly found at the surface of the Earth. A liquid can be kept in an open container and fills it to the level of a free surface. A gas forms no free surface but tends to diffuse throughout the space available: it must【C2】______be kept in a closed container, as in the 【C3】______of a planet’s atmosphere. The distinction was a prominent feature of early theories 【C4】______(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【C5】t______a quite different approach by emphasizing what liquids and gases have in common. They are both forms of matter【C6】______have no permanent structure, and they both flow easily. They are fluids.
The【C7】______(fundament)similarity of liquids and gases becomes clearly apparent when the temperature and pressure are raised somewhat. Suppose a closed container partially filled with a liquid is heated. The liquid expands, or in other【C8】______, becomes less dense: some of it evaporates. In contrast, the vapor above the liquid surface becomes dense as the evaporated molecules are added to it. The combination of temperature and pressure【C9】______ which the densities become equal is called the critical point. Above the critical point the liquid and the gas can no longer be【C10】______(distinguish): there is a single, undifferentiated fluid phase of uniform density. [br] 【C4】
选项
答案
describing
解析
本句中的describe的逻辑主语为theories,故应用现在分词。同时,describe这一动作只说明一种事实,并不与其他动词作时间上的先后比较,不必用完成时。
转载请注明原文地址:https://tihaiku.com/zcyy/3094432.html
相关试题推荐
Itisconvenienttodistinguish(区分)betweennonverbalandverbalcommunication,j
Inaddition,therearetoomuchregionaldifferencesinvocabularyforthelangu
Pronunciationisoneofthemostobviousareas.Forexample,inOldEnglish,pe
Thereisabigdifferencebetweentownlifeand【D1】__________inEngland.
Thereisabigdifferencebetweentownlifeand【D1】__________inEngland.
Whichisthemainpurposeoftheinterview?A、Toanalyzethecurrentconditionso
Thereisunfortunatelya______betweenthepettycashslipsandtheactualmone
Itisinterestingtoreflectforamomentuponthedifferencesintheareas
Itisinterestingtoreflectforamomentuponthedifferencesintheareas
Itisinterestingtoreflectforamomentuponthedifferencesintheareas
随机试题
Anewpartnerpushesouttwoclosefriendsonaverage,leavingloverswitha
Thehumangrowthhormone,madebythepituitarygland,issecretedduringsleep
Huntingforajobcanbestressful,butthere’snoreasontohurtyourchanc
在对手动火灾报警按钮功能测试时,按下手动火灾报警按钮的启动零件,()报警确认灯
与完全竞争市场和完全垄断市场不同,垄断竞争市场( )。A、基于理论假设 B、现
A.25℃有动力,37℃无动力B.菌体一端或两端膨大,有异染颗粒C.革兰染色阴性
原发性肾病综合征的主要病因是A.遗传因素 B.过敏因素 C.免疫因素 D.
刘某因脑出血行急诊手术,在抢救过程中,执行口头医嘱应A:立即执行 B:护士复述
当采用匀速进展横道图比较法比较工作实际进度与计划进度时,如果表示工作实际进度的横
工程项目施工风险管理过程中,风险识别工作包括()。A.收集与施工风险有关的信息
最新回复
(
0
)