2015年職稱英語考試理工類試題練習(xí)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醫(yī)學(xué)全在線m.zxtf.net.cn.
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 本句要表達的是兩個對立的意思：離太陽越近，我們感到越熱;離太陽越遠，我們 感到越寒冷。從所給介詞的含義來看，只有 away有"開"的意思。答案為C。
7 A 本段要表達的意思是 "溫度取決于與太陽的距離"，所以本句的空格應(yīng)填寫 location，表達"位置"這個概念。選項 B 是"教育";C 是"地位";D 是"知識"。答案只能為A 。
8 B 從意思上來考慮，選項 A 為"有趣的";選項 B 是"不可能的";選項 C 是 "合理的";D是"必要的"。文章要表達"我們被告知絕對零度之下原子是無法運動的，所以不可能存在比絕對零度更低的溫度"。從意思上考慮應(yīng)為"不可能的"，答案為B。
9 B 從詞意來考慮，選項 A為"燃燒";B為"冷卻";C為"吹";D為"切、割"。本句的意思是"兩位科學(xué)家將氣體冷卻到接近絕對零度"。答案為 B。
10 D 下文有提示，科學(xué)家 Satyendra Nath Bose 做了有關(guān)光子的理論研究。A 為"發(fā)明";B 為"實驗";C 為"紙張、論文";D 為"理論"。答案為 D。
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