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
2023-07-23
74
管理
问题
The difference between a liquid and a gas is obvious【C1】______the conditions of temperature and pressure commonly found【C2】______of the Earth. A liquid can be kept in an open container and【C3】______it to the level of a free surface. A gas forms no free surface but【C4】______to diffuse throughout the space available; it must【C5】______be kept in a closed container, as【C6】______a planet’s atmosphere. The distinction was a【C7】______feature of early theories【C8】______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【C9】______different kinds of molecules(分子). The theories now prevailing【C10】______a quite different approach by emphasizing.【C11】______liquids and gases have in common. They are both forms of matter that have no permanent structure, and they both【C12】______easily. They are fluids.
The【C13】______similarity of liquids and gases becomes clearly apparent when the temperature and pressure are raised somewhat.【C14】______a closed container partially filled with a liquid is heated. The liquid expands, or【C15】______, becomes less dense; some of it evaporates.【C16】______, the vapor above the liquid surface becomes denser as the evaporated molecules are【C17】______it. The combination of temperature and pressure【C18】______the densities become equal is【C19】______the critical point. Above the critical point the liquid and the gas can no longer be【C20】______; there is a single, undifferentiated fluid phase of uniform density. [br] 【C2】
选项
A、on the surface
B、at the surface
C、on surface
D、at surface
答案
B
解析
考查介词短语的含义和用法。本题较具迷惑性的是选项A,但它表示的是“表面上”。只有选项B可接介词 of,组成at the surface of…的结构,表示“在……的表面”,为正确答案。
转载请注明原文地址:http://tihaiku.com/zcyy/2863008.html
相关试题推荐
______(钢虽坚硬)is,itwillbendorbreakundercertainconditions.Hardassteel
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
随机试题
[audioFiles]audio_eusm_j28_001(20082)[/audioFiles]A、5.B、3.C、2.D、8.CW:Howd
[originaltext]TheearliestprintedbookweknowtodayappearedinChinaint
[audioFiles]audio_eufm_j48_001(20082)[/audioFiles]A、At9:00.B、At9:15.C、At9:
Text4Whenyougotobed,isitbecause
甲公司和乙公司均为国内的手机生产商。2019年9月,甲公司准备收购乙公司全部股权
下列不是舌咽神经痛特点的是()A.疼痛时伴有唾液分泌增加 B.说话
某中外合资家电生产企业,为增值税一般纳税人,2019年销售产品取得不含税收入25
在我国,遗产范围主要是生活资料,也包括法律允许个人所有的生产资料,这里的生产资料
具有镇静、止痛、缓解肌肉和血管痉挛的波型是A.疏密波 B.断续波 C.密波
《刑法》第13条规定:“……但是情节显著轻微危害不大的,不认为是犯罪。”该“但书
最新回复
(
0
)