首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
What Is the Coolest Gas in the Universe? What is the coldest air temperature ever recorded on the Earth? Where was this low
What Is the Coolest Gas in the Universe? What is the coldest air temperature ever recorded on the Earth? Where was this low
admin
2011-04-14
39
问题
What Is the Coolest Gas in the Universe?
What is the coldest air temperature ever recorded on the Earth? Where was this low temperature recorded? The coldest recorded temperature on Earth was - 91 °C, which ______【51】in Antarctica(MWM) in 1983.
We encounter an interesting situation when we discuss temperatures in______【52】.
Temperatures in Earth orbit actually range from about + 120°Cto - 120°C. The temperature depends upon______ 【53】you are in direct sunlight or shade. Obviously, - 120°C is colder than our body can______【54】 endure. Thank NASA science for well, de-signed space suits that protect astronauts from these temperature extremes.
The space temperatures just discussed affect only our areal of the solar______【55】. Obviously, it is hotter closer to the Sun and colder as we travel______【56】from the Sun. Astronomers estimate temperatures at Pluto are about -210°C. How cold is the lowest estimated temperature in the entire universe? Again, it depends upon your ______【57】 . We are taught it is supposedly______【58】to have a temperature below absolute zero, which is -273°C,at which atoms do not move. Two scientists, whose names are Cornell and Wieman, have successfully______【59】 down a gas to a temperature barely above absolute zero. They won a Nobel Prize in Physics in 2001 for their work, not a discovery, in this case.
Why is the two scientists’ work so important to science?
In the 1920s,Satyendra Nath Bose was studying an interesting______【60】 about special light particles we now call photons(光子) . Bose had trouble______【61】 other scientists to believe his theory, so he contacted Albert Einstein. Einstein’s calculations helped him theorize that atoms______【62】 behave as Bose thought—but only at very cold temperatures.
Scientists have also discovered that ultra -cold(超冷) atoms can help them make the world’s atomic clocks even______【63】 accurate. These clocks are so accurate today they would only lose one second______【64】 six million years! Such accuracy will help us travel in space because distance is velocity times time4(d =v xt). With the long distances involved in space______【65】, we need to know time as accurately as possible to get accurate distance.
选项
A、would
B、will
C、must
D、need
答案
A
解析
本题有一定难度,考查虚拟语气和时态一致的用法,干扰项有一定的干扰。根据上下文逻辑,文章此处是说“爱因斯坦的计算帮助Bose理论成立,即原子会象原来他设想的那样运行”,此处只是表示理论成立,而不等于是经过验证的科学事实,所以要用假设的语气,此外整个句子都是用的过去时态,因此答案是A。
转载请注明原文地址:https://kaotiyun.com/show/D1Qd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
ProlongingHumanLifeProlonginghumanlifehasincreasedthesizeofthehumanpopulation.Manypeoplealivetodaywouldha
Malnutrition"Muchofthesicknessanddeathattributedtothemajorcommunicablediseasesisinfactcausedbymalnutritio
TryingtoFindaPartnerOneofthemoststrikingfindingsofarecentpollintheUKisthatofthepeopleinterviewed,one
AcandidatesforclinicaltrialsBduringthetrialCmedicalknowledgeDinhumansEbeforeparticipationFforsomepatients
FriendlyRelationswiththePeopleAround1Youdependonallthepeoplecloselyaroundtogiveyouthewarmfeelingofbelongin
Peoplearoundtheglobehittheheightoftheirmiseryanddepressionin(51)age,anewinternationalstudysuggests.The
FlyingintoHistoryWhenyouturnonthetelevisionorreadamagazine,celebrities(名人)areeverywhere.Althoughfameandt
Timeisveryimportantinourlives.Itorganizesoureverydaymoments.However,timeneverhadanyimportanceinmylifeuntil
TheSpanishFluEpidemicIfyou’reworriedaboutthepossibilityofacomingbirdfluepidemic,youcantakecomfortinthef
A.suitdifferentpeopleB.befurtherexploredC.helpthedisabledD.beusedexternallyE.havehealingeffectsF.bepromote
随机试题
治疗气厥实证的首选方剂是
毛果芸香碱(匹鲁卡品)对眼的作用表现为
人参配莱菔子,莱菔子能削弱人参的补气作用,这种配伍关系属于()。
A施工单位承包了某建设单位扩建工程的一个新建轻烃储存罐区,罐区主体工程为4台2000m3球形储罐,球形罐结构形式为5带桔瓣式,依次为:赤道带,上、下温带,上、下极。建设单位将球罐区及其附近一块区域划给A施工单位作为施工和办公用地,A施工单位进行了施工总平面
红光印染厂被宣告破产,需要清偿如下费用及债务:(1)管理、变价和分配企业财产的费用(2)企业作为保证人对被保证人负担的保证债务(3)企业欠缴的社会保险费用(4)企业财产受无因管理所产生的债务以上费用及债务的
关于人员招聘与选拔,表述正确的是()。
已知f(x)=求f′(x),并求f(x)的极值.
某企业有生产部和销售部,生产部负责生产产品并送入仓库,销售部从仓库取产品销售。假设仓库可存放n件产品。用PV操作实现它们之间的同步过程如下图所示。其中,信号量S是一个互斥信号量,初值为(1);S1是一个(2);S2是一个
在Windows 98操作系统启动时,引导的过程按顺序排列应该是( )。 ① 装入实模式的设备驱动程序 ② 装入操作系统 ③ 装入并初始化静态vxd ④ 执行BIOS程序
窗体设计时可以设置窗体、主体、标签或文本框等内容的属性。下列属性中,属于窗体的属性是
最新回复
(
0
)