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最新职称英语理工C类完形填空集训练习题

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最新职称英语理工C类完形填空集训练习题

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最新职称英语理工C类完形填空集训练习题

  What Is the Coolest Gas in the Universe

  What is the coldest air temperature ever recorded on Earth? Where was this low temperature recorded? The coldest recorded temperature on Earth was -90℃, which __________ (51) in Antarctica (南极洲 ) in 1983.

  We encounter an interesting situation when we discuss temperatures in __________ (52).

  Temperatures in Earth orbit (轨道) actually range from about + 120℃ to -120℃. The temperature depends upon __________ (53) you are in direct sunlight or in shade. Obviously, -120℃ is colder than our body can __________ (54) endure.

  The space temperatures just discussed affect only our area of the solar __________ (55).Obviously, it is hotter closer to the Sun and colder as we travel __________ (56) from the Sun.

  Scientists estimate temperatures at Pluto are about -210℃. 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℃, at which atoms do not move. Two scientists, 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 (微粒) 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 (速度) times time (d=υt). With the long distances involved in space__________ (65), we need to know time as accurately as possible to get accurate distance.

  51._________

  A.operated

  B.occurred

  C.opened

  D.offered

  52.___________

  A.star

  B.Earth

  C.space

  D.planet

  53.___________

  A.whether

  B.where

  C.what

  D.when

  54.___________

  A.safely

  B.sadly

  C.repeatedly

  D.freely

  55.___________

  A.system

  B.energy

  C.year

  D.rays

  56.___________

  A.by

  B.away

  C.along

  D.with

  57.___________

  A.education

  B.status

  C.knowledge

  D.location

  58.___________

  A.impossible

  B.interesting

  C.reasonable

  D.necessary

  59.___________

  A.burnt

  B.blown

  C.cut

  D.cooled

  60.___________

  A.invention

  B.experiment

  C.theory

  D.paper

  61.___________

  A.forcing

  B.begging

  C.ordering

  D.convincing

  62.___________

  A.would

  B.will

  C.must

  D.need

  63.___________

  A.that

  B.such

  C.much

  D.more

  64.___________

  A.any

  B.each

  C.some

  D.every

  65.___________

  A.station

  B.craft

  C.travel

  D.age

  答案解析

  51.答案:B

  解析:这里考查的是词汇。句意:地球上的最低温度记录是零下。90度,__________1983年的。南极洲。此处表达的意思是“发生于”,因此选B。

  52.答案:C

  解析: 这里考查的是词汇。句意:当我们在讨论__________温度的时候我们遇到了很有趣的现象。此处的答案在文中第三段第一句话有提示,因此我们讨论的是大气温度,所以答案为C。

  53.答案:A

  解析: 这里考查的是固定搭配。句意:温度取决于你在阳光直射下还是阴凉处。whether…or,意思为“是……还是……”,因此选择A。

  54.答案:A

  解析: 这里考查的是词汇。句意:很明显,零下120度比我们身体维持的——温度要低很多。四个选项:safely(安全地),sadly(悲哀地),repeatedly(重复地),freely(自由地,免费地)分别代入,只有A与原句表示的“身体安全”相符,故A为正确答案。

  55.答案:A

  解析: 这里考查的是词汇。句意:我们之前讨论的大气温度只影响我们的太阳__________。四个选项:system(系统),energy(能量),year(年),rays(射线),显然原句应是“太阳系”,因此选A。

  56.答案:B

  解析: 这里考查的是词汇。句意:显然,离太阳越近则越热,离太阳——越冷。此处考查的是与closer意义相反的短语,因此是travel away from(远离),所以选择B。

  57.答案:D

  解析: 这里考查的是词汇。句意:同样,这取决于你的__________。前一句问的是在宇宙中能预测到最冷的地方在哪儿,很显然这与你所在的位置有关,故D为正确答案。

  58.答案:A

  解析: 这里考查的是词汇。句意:我们从课本中学到__________有低于绝列零度的温度。常识问题,没有绝对零度的.物体,因此A为正确答案。

  59.答案:D

  解析: 这里考查的是词汇。句意:两位科学家Cornell和Wieman成功地将气体__________接近绝对零度。我们都知道绝对零度是零下273.15度,因此此处应为cool down(冷却),故D为正确答案。

  60.答案:C

  解析: 这里考查的是词汇。句意:在20世纪20年代,Satyendra Nath Bose就研究关于光子的有趣的__________。后一句讲Bose无法使科学家们相信他的理论,因此此处应选theory。

  61.答案:D

  解析: 这里考查的是词汇。句意:Bose无法使科学家们__________他的理论,所以他联系了爱因斯坦。四个选项:force(强迫),beg(请求),order(命令),convince(使确信)分别代入,可知D为正确答案。

  62.答案:A

  解析: 这里考查的是时态。句意:爱因斯坦的计算有助于他将其理论化,那就是原子像Bose所认为的那样运动,但只有在非常低的温度之下才行。整个句子为过去时,所以答案为would。

  63.答案:D

  解析: 这里考查的是词汇。句意:科学家们发现超冷的原子可以帮助他们制造世界__________精确的原子时钟。后一句说这些时钟如此地精确,因此此处是表达“更精确”,形容词的比较级用more,故D为正确答案。

  64.答案:D

  解析: 这里考查的是词汇。句意:这些时钟如此精确,以至于__________600万年才会走慢1秒钟。根据选项可知这里表达的是“每600万年”,each后面是跟单数名词,every在这里作“每隔”讲,因此D为正确答案。

  65.答案:C

  解析: 这里考查的是词汇。句意:在太空里长距离地__________我们需要时间越精确越好,以便到达正确的目的地。四个选项:station(火车站,站),craft(工艺,手艺),travel(移 动,旅行),age(年龄)分别代入,可知答案选C。

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