首页
登录
职称英语
The difference between a liquid and a gas is obvious【1】the conditions of tem
The difference between a liquid and a gas is obvious【1】the conditions of tem
游客
2025-04-18
31
管理
问题
The difference between a liquid and a gas is obvious【1】the conditions of temperature and pressure commonly found at the surface of the Earth. A liquid can be kept in an open container and【2】it to the level of a free surface. A gas forms no free surface but【3】to diffuse throughout the space available; it must【4】be kept in a closed container, as【5】a planet’s atmosphere. The distinction was a prominent feature of early theories【6】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【7】different kinds of molecules(分子). The theories now prevailing【8】a quite different approach by emphasizing what liquids and gases have in common. They are both forms of matter that have no permanent structure, and they both flow easily. They are fluids.
The【9】similarity of liquids and gases becomes clearly apparent when the temperature and pressure are raised somewhat.【10】a closed container partially filled with a liquid is heated. The liquid expands, or【11】, becomes less dense; some of it evaporates.【12】, the vapor above the liquid surface becomes denser as the evaporated molecules are added to it. The combination of temperature and pressure【13】the densities become equal is【14】the critical point. Above the critical point the liquid and the gas can no longer be【15】; there is a single, undifferentiated fluid phase of uniform density. [br] 【2】
选项
A、fills
B、be filled
C、filling
D、to fill
答案
A
解析
由空前的连词and可知后半句与前半句存在并列关系,揭示了液体的属性,一般现在时可以表示事物的一般属性。且全文主要用一般现在时态。故答案应选A。
转载请注明原文地址:http://tihaiku.com/zcyy/4043007.html
相关试题推荐
Theconditionscanbewellimaginedwhenonesmallsettlementisexpectedto____
Thebiographerhastodancebetweentwoshakypositionswithrespecttothe
Thebiographerhastodancebetweentwoshakypositionswithrespecttothe
YangtzeRiverflowsatawidthofupto2kmandanaveragedepthofbetween6an
Thecontractbetweenthecompanieswill______attheendoftheyear.A、expireB、e
Obviously,noteacherhas______patience.EvenLarry,whoisalwayskindandtol
Thefundamentaldistinctionbetweenaconstitutionandordinarylawsissimi
Inordertounderstandwhatamythreallyis,mustwechoosebetweenplatitu
Inordertounderstandwhatamythreallyis,mustwechoosebetweenplatitu
Inordertounderstandwhatamythreallyis,mustwechoosebetweenplatitu
随机试题
ThetermBRICwasfirst______byGoldmanSachseconomistJimO’Neillinaresearc
Nobigdevelopedcountryhascomeoutoftheglobalrecessionlookingstrong
[originaltext]Theagriculturalrevolutioninthe19thcenturyinvolvedtwo
A.便血量多而鲜红 B.便血少而疼痛 C.便血污秽而腥臭 D.便血量多而色
Thechangeinthatvillagewasmiraculou
W公司2010年和2011年12月31日资产负债表部分项目余额如下: 假定
市场调查是指运用科学的方法,有目的地、系统地搜集、记录、整理有关市场的信息和资料
脾与胃的关系表现为( )。A.藏泄相济 B.升降相因 C.燥湿相济 D.
法人的分支机构以自己的名义从事民事活动,产生的民事责任由分支机构自行承担。(
( )是项目监理机构对施工现场进行的定期或不定期的检查活动,是项目监理机构对工
最新回复
(
0
)