2015年职称英语考试理工类试题练习及答案2
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医学全在线www.lindalemus.com.
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.
6.A. by B. along C. away D. With
7.A. location B education C status D knowledge
8.A. interesting B. impossible C. reasonable D. necessary
9.A. burnt B. cooled C. blown D. cut
10.A. invention B. experiment C. paper D. theory
答案：
6 C 本句要表达的是两个对立的意思：离太阳越近，我们感到越热;离太阳越远，我们 感到越寒冷。从所给介词的含义来看，只有 away有"开"的意思。答案为C。
7 A 本段要表达的意思是 "温度取决于与太阳的距离"，所以本句的空格应填写 location，表达"位置"这个概念。选项 B 是"教育";C 是"地位";D 是"知识"。答案只能为A 。
8 B 从意思上来考虑，选项 A 为"有趣的";选项 B 是"不可能的";选项 C 是 "合理的";D是"必要的"。文章要表达"我们被告知绝对零度之下原子是无法运动的，所以不可能存在比绝对零度更低的温度"。从意思上考虑应为"不可能的"，答案为B。
9 B 从词意来考虑，选项 A为"燃烧";B为"冷却";C为"吹";D为"切、割"。本句的意思是"两位科学家将气体冷却到接近绝对零度"。答案为 B。
10 D 下文有提示，科学家 Satyendra Nath Bose 做了有关光子的理论研究。A 为"发明";B 为"实验";C 为"纸张、论文";D 为"理论"。答案为 D。
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