2025上半年英语四级考试阅读练习题（3）

　　英语四级的阅读部分要求考生具备快速理解和分析的能力，强化阅读训练将为考试成功奠定基础。小编整理了2025上半年英语四级考试阅读练习题（3），希望可以为大家带来帮助。

　　2025上半年英语四级考试阅读练习题（3）

　　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

　　以上是新东方在线英语四级频道小编整理的“2025上半年英语四级考试阅读练习题（3）”，希望考生们取得出色的成绩，顺利通过四级考试。