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最新職稱英語理工C類完形填空集訓(xùn)練習(xí)題

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最新職稱英語理工C類完形填空集訓(xùn)練習(xí)題

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最新職稱英語理工C類完形填空集訓(xùn)練習(xí)題

  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 (南極洲 ) in 1983.

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

  Temperatures in Earth orbit (軌道) 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:這里考查的是詞匯。句意:地球上的最低溫度記錄是零下。90度,__________1983年的。南極洲。此處表達的意思是“發(fā)生于”,因此選B。

  52.答案:C

  解析: 這里考查的是詞匯。句意:當我們在討論__________溫度的時候我們遇到了很有趣的現(xiàn)象。此處的答案在文中第三段第一句話有提示,因此我們討論的是大氣溫度,所以答案為C。

  53.答案:A

  解析: 這里考查的是固定搭配。句意:溫度取決于你在陽光直射下還是陰涼處。whether…or,意思為“是……還是……”,因此選擇A。

  54.答案:A

  解析: 這里考查的是詞匯。句意:很明顯,零下120度比我們身體維持的——溫度要低很多。四個選項:safely(安全地),sadly(悲哀地),repeatedly(重復(fù)地),freely(自由地,免費地)分別代入,只有A與原句表示的“身體安全”相符,故A為正確答案。

  55.答案:A

  解析: 這里考查的是詞匯。句意:我們之前討論的大氣溫度只影響我們的太陽__________。四個選項:system(系統(tǒng)),energy(能量),year(年),rays(射線),顯然原句應(yīng)是“太陽系”,因此選A。

  56.答案:B

  解析: 這里考查的是詞匯。句意:顯然,離太陽越近則越熱,離太陽——越冷。此處考查的是與closer意義相反的短語,因此是travel away from(遠離),所以選擇B。

  57.答案:D

  解析: 這里考查的是詞匯。句意:同樣,這取決于你的__________。前一句問的是在宇宙中能預(yù)測到最冷的地方在哪兒,很顯然這與你所在的位置有關(guān),故D為正確答案。

  58.答案:A

  解析: 這里考查的是詞匯。句意:我們從課本中學(xué)到__________有低于絕列零度的溫度。常識問題,沒有絕對零度的.物體,因此A為正確答案。

  59.答案:D

  解析: 這里考查的是詞匯。句意:兩位科學(xué)家Cornell和Wieman成功地將氣體__________接近絕對零度。我們都知道絕對零度是零下273.15度,因此此處應(yīng)為cool down(冷卻),故D為正確答案。

  60.答案:C

  解析: 這里考查的是詞匯。句意:在20世紀20年代,Satyendra Nath Bose就研究關(guān)于光子的有趣的__________。后一句講Bose無法使科學(xué)家們相信他的理論,因此此處應(yīng)選theory。

  61.答案:D

  解析: 這里考查的是詞匯。句意:Bose無法使科學(xué)家們__________他的理論,所以他聯(lián)系了愛因斯坦。四個選項:force(強迫),beg(請求),order(命令),convince(使確信)分別代入,可知D為正確答案。

  62.答案:A

  解析: 這里考查的是時態(tài)。句意:愛因斯坦的計算有助于他將其理論化,那就是原子像Bose所認為的那樣運動,但只有在非常低的溫度之下才行。整個句子為過去時,所以答案為would。

  63.答案:D

  解析: 這里考查的是詞匯。句意:科學(xué)家們發(fā)現(xiàn)超冷的原子可以幫助他們制造世界__________精確的原子時鐘。后一句說這些時鐘如此地精確,因此此處是表達“更精確”,形容詞的比較級用more,故D為正確答案。

  64.答案:D

  解析: 這里考查的是詞匯。句意:這些時鐘如此精確,以至于__________600萬年才會走慢1秒鐘。根據(jù)選項可知這里表達的是“每600萬年”,each后面是跟單數(shù)名詞,every在這里作“每隔”講,因此D為正確答案。

  65.答案:C

  解析: 這里考查的是詞匯。句意:在太空里長距離地__________我們需要時間越精確越好,以便到達正確的目的地。四個選項:station(火車站,站),craft(工藝,手藝),travel(移 動,旅行),age(年齡)分別代入,可知答案選C。

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