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
2024-08-07
22
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/3709664.html
相关试题推荐
Thereisunfortunatelya______betweenthepettycashslipsandtheactualmone
Itisinterestingtoreflectforamomentuponthedifferencesintheareas
Itisinterestingtoreflectforamomentuponthedifferencesintheareas
Renaissancewasthetransitionalperiodbetweenthe______and______.A、Primitiv
Collisionbetweenanaircraftandoneormorebirdsistermedabird-strike.
Collisionbetweenanaircraftandoneormorebirdsistermedabird-strike.
Effectivereadingrequiresnotonly"readingbetweenthelines,"butalso"w
Effectivereadingrequiresnotonly"readingbetweenthelines,"butalso"w
Effectivereadingrequiresnotonly"readingbetweenthelines,"butalso"w
Effectivereadingrequiresnotonly"readingbetweenthelines,"butalso"w
随机试题
Afterabusydayofworkandplay,thebodyneedstorest.Sleepisnecessary
WherewasthemeetingtoplanHaiti’srecoveryheld?[br][originaltext]The
某市民政局局长在出差前交代办公室职员小王,在国庆节前下发开展安全生产检查的通知,
患者因反复突然意识丧失、全身对称性抽搐被诊断为癫痫,为确诊最重要的检查是(
李某购买了其亲戚家的一处不动产。按照有关规定,李某应到当地房地产管理部门办理(
下列属于消防安全管理的技术方法有()。A.法律方法 B.事件树分析法 C.
对未来现金流量以恰当的折现率进行折现后的价值,考虑货币时间价值因素的一种计量属性
(2020年真题)甲服装厂为增值税一般纳税人,2019年10月将100
某建设项目发生变动。根据《关于印发〈污染影响类建设项目重大变动清单(试行)〉的通
关于招标投标投诉的说法,正确的有( )A.投诉应当有明确的请求和必要的证明材料
最新回复
(
0
)