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  3. As the horizons of science have expanded, two main groups of scientists have emerged. One is the pure scientist; the other, the

As the horizons of science have expanded, two main groups of scientists have emerged. One is the pure scientist; the other, the

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问题     As the horizons of science have expanded, two main groups of scientists have emerged. One is the pure scientist; the other, the applied scientist.
    The pure or theoretical scientist does original research in order to understand the basic laws of nature that govern our world. The applied scientist adapts this knowledge to practical problems. Neither is more important than the other, however, for the two groups are very much related. Some times, however, the applied scientist finds the "problem" for the theoretical scientist to work on. Let’ s take a particular problem of the aircraft industry: heat-resistant metals. Many of the metals and alloys which perform satisfactorily in a car cannot be used in a jet-propelled plane. New alloys must be used, because the jet engine operates at a much higher temperature than an automobile engine. The turbine wheel in a turbojet must withstand temperatures as high as 1,600 degrees Fahrenheit, so aircraft designers had to turn to the research metallurgist for the development of metals and alloys that would do the job in jet-propelled planes.
    Dividing scientists into two groups is only one broad way of classifying them, however. When scientific knowledge was very limited, there was no need for men to specialize.  Today, with the great body of scientific knowledge, scientists specialize in many different fields. Within each field, there is even further subdivision. And, with finer and finer subdivisions, the various sciences have become more and more interrelated until no one branch is entirely independent of the others. Many new specialties--geophysics and biochemistry, for example--have resulted from combining the knowledge of two or more sciences.
Finer and finer subdivision in the field of science has resulted in ______.
选项 A、greater independence of each science
B、greater interdependence of all the various sciences
C、the eradication of the need for specialists
D、the need for only on classification of scientists
答案B
解析 第三段第四句讲到with finer and finer subdivisions,.. entirely independent of the others．(随着分科越来越细，不同的学科之间的联系越来越多直到没有任何一个分支是可以完全独立于其他学科)，所以选项B说“不同的学科之间相互依赖越来越强”，与原文意思相符。
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