2014職稱英語考試(理工類)完形填空專練1
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
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
56.A. by B. along C. away D. With
57.A. location B education C status D knowledge
58.A. interesting B. impossible C. reasonable D. necessary
59.A. burnt B. cooled C. blown D. cut
60.A. invention B. experiment C. paper D. theory
61.A. forcing B. begging C. convincing D. ordering
62.A. will B. would C. must D. need
63.A. that B. such C. more D. much
64.A. every B. any C. each D. some
65.A. station B. craft C. age D. travel
答案:DADDC CABBD CBCAD
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