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] 【C2】
选项
答案
therefore
解析
这里表因果关系,所以用therefore。句意:气体容易扩散,所以必须保存在密闭的容器里。
转载请注明原文地址:https://tihaiku.com/zcyy/3093514.html
相关试题推荐
Travelbetweentimezonesmay_________evidentdisturbancesinnormalsleeppat
MybestfriendandI________ourdifferencesindifferentways.Iliketotalk
实际上,孩子们与父母之间的分歧并不像我们想象的那样大。(expect)Infact.thegapbetweenchildrenandtheir
Itisinterestingtoreflectforamomentuponthedifferencesintheareas
Itisinterestingtoreflectforamomentuponthedifferencesintheareas
Itisinterestingtoreflectforamomentuponthedifferencesintheareas
Itisinterestingtoreflectforamomentuponthedifferencesintheareas
Collisionbetweenanaircraftandoneormorebirdsistermedabird-strike.
Effectivereadingrequiresnotonly"readingbetweenthelines,"butalso"w
Effectivereadingrequiresnotonly"readingbetweenthelines,"butalso"w
随机试题
Traditionally,thefirstfirmtocommercializeanewtechnologyhasbenefite
[originaltext]Longago,nooneinEuropesmoked.Thetobaccoplantwasunkn
甲企业拟进行股权转让,需对其股东全部权益价值进行评估。采用资产基础法评估时,其长
公司长期投资最适当的融资方式是银行的长期借款。()
在化学课堂上.教师不仅要将化学事实描述清楚。并且要对该事实加以深入的分析和论证,
治疗阴虚肺燥,干咳无痰,口干舌燥者,应首选A.石膏 B.芦根 C.天花粉
下边四个图形中,只有一个是由上边的四个图形拼合(只能通过上、下、左、右平移)而成
棉涤色织机织物制的床单,其中含棉50%,涤纶短纤50%
项目决策的下列相关做法,符合民主决策原则的有()。A.对于企业投资项目,采
某水库枢纽工程有主坝、副坝、溢洪道、电站及灌溉引水隧洞等建筑物组成,水库总库容
最新回复
(
0
)