2015年度职称英语考试理工类试题练习及答案3
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)医学.全在线www.med126.com.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.
11.A. will B. would C. must D. need
12.A. that B. such C. more D. much
13.A. every B. any C. each D. some
14.A. station B. craft C. age D. travel
答案：
11 B 根据上下文判断可以排除选项 C 和D。will 可用来表示"在一定的情况下通常会……'，又因为本句主句的时态为一般过去式，所以从句中的助动词使用过去式 would。 本题答案为B
12 C 句中的 even 是对比较级的修饰，所以本题答案为 C，表达的意思是"甚至更准确"。
13 A 本句要表达的意思是"这些钟准确到每 6 百万年才差一秒钟"，所以应该选择every，表达"每一"，其与 each 的区别是 every带有频率的含义，而 each 没有这种意思。
14 D 本句要表达的意思是"在长距离的太空旅行时，我们更需要准确的时间以判断准确的距离"。只有选项 D"旅行"最合适。选项 A 为"站";B 为"工艺";选项 C 为"年龄、时代"。
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