2019年12月英语四级考试阅读练习题3

坦途网英语四级考试频道提示下半年英语四级考试时间距离现在还有5个月，不论学习哪一门学科，我们都需要给自己制定学习计划以及每个阶段要达到的目标。目标是我们的动力，也是前进的方向。只有朝着目标不断努力，才能顺利通过考试。

Television was not invented by any one person. Nor did it spring into being overnight. It evolved gradually, over a long period, from the ideas of many people -- each one building on the work of their predecessors. The process began in 1873, when it was accidentally discovered that the electrical resistance of the element selenium varied in proportion to the intensity of the light shining on it. Scientists quickly recognized that this provided a way of transforming light variations into electrical signals. Almost immediately a number of schemes were proposed for sending pictures by wire(it was, of course, before radio).

One of the earliest of these schemes was patterned on the human eye. Suggested by G. R. Carey in 1875, it envisioned a mosaic of selenium calls on which the picture to be transmitted would be focused by a lens system. At the receiving end there would be a similarly arranged mosaic made up of electric lights. Each selenium cell would be connected by an individual wire to the similarly placed light in the receiving mosaic. Light falling on the selenium cell would reproduce the original picture, had the necessary amplifiers and the right kind of lights been availablr, this system would have workrd. But it also would have required an imoractical number of connecting wires. Carey recognized this and in a second proposed to “scan” the cells-transmitting the signal from each cell to its associated light, in turn, over a single wire. If this were done fast enough, the retentive power of the eye would cause the resultant image to be seen as a complete picture.

41. Which of the following is the best title for the passage?

A. Television in the Electronic Era

B. First Steps in the Invention of Television

C. The Art of Television

D. Harmful Effects of Television Viewing

42. In line 1, the word “being” could best be replaced by _____.

A. place

B. creature

C. subsistence

D. existence

43. An important discovery in earlyteleviosion was the electrical resistance of _____.

A. mosaics

B. the human eye

C. lenses

D. the element selenium

44. In 1875, Carey suggested that the human eye envisioned a mosaic of selenium cells on which the picture to be transmitted would be focused by ______.

A. wire

B. electric lights

C. a lens system

D. amplifiers

45. Following are the reasons why the first scheme for television was abandoned except _____.

A. he lacks an effective assistant

B. the necessary amplifers were unavailable

C. the proper lights were unavailable

D. the number of connecting wires is impractical

答案：B D D C A

以上分享的内容为英语四级考试中阅读部分习题，在平时勤加练习，才能在考试中提高阅读效率。大家在做阅读题的时候需要掌握一些阅读技巧，很多题篇幅都比较长，如果整篇看完以后再作答是很难将文中每个关键点记住的。因此我们可以先看问题，带着疑问去阅读，这样阅读效率会有明显提高。