2015年職稱英語考試?yán)砉ゎ愒囶}練習(xí)及答案1
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℃，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 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(顆粒)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 times time(d=vt).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. opened C. offered D. occurred
52.A. space B. star C. Earth D. planet醫(yī)學(xué)全在線m.zxtf.net.cn
53.A. where B. what C. when D. whether
54.A. sadly B. repeatedly C. Freely D. safely
55.A. energy B. year C. system D. rays
答案：
51 D 本題考查四個(gè)動(dòng)詞的意思。A 為"操作，運(yùn)行";B 為"打開，開張";C為 "提供， 提出";D為"發(fā)生，出現(xiàn)"本句要表達(dá)"1983 年南極洲出現(xiàn)了地球上記錄到的最低溫度"。答案為 D。
52 A 本題是對(duì)名詞意思的考查。A為"太空";B為"星星";C為"地球";D為"行星"。從文章的第三段第一句話可以看出，本段討論太空的溫度。答案為 A。
53 D 本題是對(duì)連接詞意思和用法的考查。A為"何地"; B為"什么";C為"何時(shí)";D為"是否"。本句從句中不缺少任何成分，只是想表達(dá)"溫度取決于你是否向陽，或是向陰"。答案為D。
54 D 本題是對(duì)副詞意思的考查。A為"難過地";B 為"重復(fù)地"; C為"自由地";D 為"安全地"。本句的意思是"我們的身體無法安全耐受零下 120 度的溫度"。答案為 D。
55 C 本題要表達(dá)的意思是"太陽系"。 A是"能量";B是"年9";C是"系統(tǒng)";D 是 "射線"。只有 C符合題意。
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