2015年职称英语考试理工类试题练习及答案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 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(颗粒)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医学全在线www.lindalemus.com
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 本题考查四个动词的意思。A 为"操作，运行";B 为"打开，开张";C为 "提供， 提出";D为"发生，出现"本句要表达"1983 年南极洲出现了地球上记录到的最低温度"。答案为 D。
52 A 本题是对名词意思的考查。A为"太空";B为"星星";C为"地球";D为"行星"。从文章的第三段第一句话可以看出，本段讨论太空的温度。答案为 A。
53 D 本题是对连接词意思和用法的考查。A为"何地"; B为"什么";C为"何时";D为"是否"。本句从句中不缺少任何成分，只是想表达"温度取决于你是否向阳，或是向阴"。答案为D。
54 D 本题是对副词意思的考查。A为"难过地";B 为"重复地"; C为"自由地";D 为"安全地"。本句的意思是"我们的身体无法安全耐受零下 120 度的温度"。答案为 D。
55 C 本题要表达的意思是"太阳系"。 A是"能量";B是"年9";C是"系统";D 是 "射线"。只有 C符合题意。
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