阅读理解 As the horizons of science have been expended two main groups of scientists have formed. One is pure scientist; the other is the applied scientist. The pure or theoretical scientist does original research in order to understand the basic laws of nature that govern(支配) our world. The applied scientist adapts(使适应) this knowledge to practical problems. Neither is more important than the other however for the two groups are very much related. Sometimes however the applied scientist finds the “problems” for the theoretical scientist to work on. Let's take a particular problem of the aircraft metals. Many of the metals which work well in a car cannot be used in a jet plane because the jet engine operates at a much higher temperature than an automobile engine so aircraft designers have to turn to the researchers for the development of metals that would do the job in jet planes. Dividing scientists into two group－pure and applied－is only one broad way of classifying them however. When scientific knowledge was very limited there was no need for men to specialize(专门化). Today with the great body of scientific knowledge scientists specialize in many different fields. Within each field there is even further subdivision(再划分). And with finer and finer subdivisions the various sciences have bee more and more related until no one branch is entirely independent of the others. Many new specialists(专业) have resulted from bining the knowledge of two or more sciences. 1．The applied scientist . [ ] A．does original research to understand the basic laws of nature B．applies the results of research to practical problems C．provides the basic knowledge for the pure scientist D．is not interested in practical problems 2．Concerning the relative importance of pure and applied scientists the writer thinks that . [ ] A．applied scientists are more important B．pure scientists are more important C．neither is important D．both are equally important 3．The example given in the third paragraph shows how . [ ] A．pure science operates independently of applied science B．applied scientists discover the basic laws of nature C．applied science defines all the areas where the basic research is done D．applied scientist suggests problems for the pure scientists 4．In the example given the aircraft designer represents the . [ ] A．applied scientist B．pure scientist C．non－scientist D．skilled mechanic(机械工) 5．“The horizons of science have been expended” means that . [ ] A．scientists can see further out into space B．science has developed more research fields C．the horizon changes size from year to year D．scientists have made a machine for expending the horizon
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【答案】 答案：B;D;D;A;B