| 四六级考试六级每日一练（2019/8/12） |
| 第1、2、3、4、5题：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 |
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| 第6题：Two（）sixistwelve. A.and B.substracts C.times D.besides |
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| 第7、8、9、10、11题：Because Ireland is an island geographically near the mainland of the United Kingdom, English rulers have fought since the Middle-English Ages to retain political control over it. Attracted by the lush farmland, English and Scottish landowners settled there, and in time of famine or political unrest, the local workers suffered, while their landlords were cushioned by their wealth. The history of modern Ireland is, in fact, largely a story of antagonism and resentment between the Irish and their English and Scottish rulers. Since the 1920's, Ireland has been divided into two parts: Northern Ireland (Ulster) and the Republic of Ireland (Eire). The north is still part of the United Kingdom and is predominantly Protestant; the south is an independent republic and is mainly Catholic. The majority in Ulster accept this political compromise, but the active and mainly Catholic minority are fighting for union with the independent republic of Southern Ireland. The IRA, the Irish Republican Army, have mounted bombing campaigns in military and civil targets in Ulster and England. They have sent letter-bombs to public figures, they have slot fellow Irishmen who support the British or belong to opposing, and now equally militant Protestant groups. As a result of this, the British have stationed an army in Belfast, the IRA have been outlawed, and several of them have spent many years in prison or have died in support of their cause. Whether this level of violence and repression is justifiable, and whether the violence that could result from political change would be worthwhile are the controversial issues that divide everybody involved. 36. It suggested that the central problem is relationship between _______. A. Britain and Ireland B. Ulster and Eire C. Catholics and Protestants D. the Irish Republican Army and Ulster. 37. This outline suggests that the central problem is ________. A. many centuries old B. about three centuries old C. about 80 years old D. a few years old 38. The IRA is ________. A. part of the Ulster police force B. part of American army C. a group of militant priests D. a terrorist organization 39. Bomb attacks occur _______. A. only in England B. when public figures talk about Ireland C. only in Northern Ireland D. in England and Northern Ireland 40. The writer feels that the controversy is about ________. A. freedom B. political change C. the use of violence D. injustice |
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| 第12题：You can borrow my book provided that you（）it to me tomorrow. A.return B.returned C.will return D.would retum |
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| 第13、14、15、16、17题：Disagreements among economists are legendary, but not on the issue of free trade. A recent survey of prominent economists-both conservative and liberal-concluded that "an economist who argues for restricting international trade is almost as common today as a physician who favors leeching." Why the consensus? International free trade, economists agree, makes possible higher standards of living all over the globe. The case for free trade rests largely on this principle: as long as trade is voluntary, both partners benefit; otherwise they wouldn't trade. The buyer of a shirt, for example, values the shirt more than the money spent, while the seller values the money more. Both are better off because of the sale. Moreover, it doesn't matter whether the shirt salesman is from the United States or Hong Kong or anywhere else). The vast majority of American manufactures face international competition. This competition forces companies to improve quality and cut costs. By contrast, protectionism encourages monopoly, lower quality and higher prices. Americans pay an enormous price for protectionism -- over '60 billion a year, or ' 1000 for a family of four. Thanks to protectionism, for example, American consumers pay twice the world price for sugar. Free trade also makes the world economy more efficient, by allowing nations to capitalize on their strengths. The United States has an advantage in food production, for instance, while Saudi Arabia has an advantage in oil. The Saudis could undertake massive irrigation to become self-sufficient in food, but it is more economical for them to sell oil and purchase food from us. Similarly, we could become self-sufficient in petroleum by squeezing more out of oil sale. But it is much less costly to buy some of our oil from Saudi Arabia. Trade between our two countries improves the standard of living in both. Protectionism is both wasteful and unjust. It taxes most heavily on the people who can least afford it. Thus, tariffs that raise the price of shoes burden the poor more than the rich. Despite the powerful case for free trade, the United States and the rest of the world have always been protectionist to some degree. This is because free trade benefits the general public, while protectionism benefits special-interest groups, which are better organized, better financed and more informed. To make matters worse, much of what we hear on this issue is misinformation spread by the special interests themselves. 31. The economists _______. A. disagree whether to restrict free trade or not B. agree on free trade C. agree on the restriction if internal trade D. hold different arguments because to their different interests 32. The two parties in a free trade ________. A. do not care at all B. care for different things C. care for the things being traded D. care for the same things 33. What is the author's attitude toward protectionism denoted from the 5th paragraph? A. Sincere B. Appreciative C. Grateful D. Ironic 34. Why has protectionism always been exercised if it is wasteful and unjust? Because ________. A. it helps to establish national industry of one's own B. it can achieve an independent economy C. it is favored by general public D. it benefits some privileged few 35. According to the free trade principle, the author suggests that ______. A. U.S. explore its oil shale B. Saudi Arabia build its own industry C. Saudi Arabia import food from U.S. D. U.S. becomes more self-sufficient in food |
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| 第18题：Unlike science,progress in technology must be measured in terms of the human factor.Technology must be our slave and（）. A.not the reverse B.not the version C.not the same D.not the prejudice |
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| 第19题：The security of the passengers is supposed to（） by the captain. A.see to B.seeing to C.be seen to D.seen to |
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| 第20题：Some of the most, important problems in physics （） their success to these mathematics systems. A. oblige B. devote C. contribute D. attribute |
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| 第21题： He told me that the number of students attending the meeting ____over 100. A.are B.were C.is D.was |
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| 第22、23、24、25、26题：The modern sailing ship was developed by a man who never went to sea. He was Prince Henry of Portugal,the younger son of the Partuguese king and an English princess. Prince Henry lived in the fifteenth century.As a boy he became devoted to the sea,and he dedicated himself to improving the design of ships and the methods of sailing them.In 1416,when he was twentytwo,Henry founded a school for mariners, to which he invited everyone who could help him—Jewish astronomers,Italian and Spanish sailors,and Arab mathematicians and map makers who knew to use the crude compass of the day and could improve it. Henry's goal was to design and equip vessels that would be capable of making long ocean voyages without having to hug the shore.The caravel carried more sail and was longer and slimmer than any ship then made,yet was tough enough to withstand gales at sea.He also developed the carrack,which was a slower ship,but one that was capable of carrying more cargo. To Prince Henry the world owes credit for development of craft that made oceanic exploration possible.He lives in history as Henry the Navigator. 36. Henry the Navigator was a member of the royal family of____. A.England B.Spain C.Italy D.Portugal 37. Prince Henry started his school for the purpose of____. A.helping mariners B.improving ship design and sailing methods C.studying astronomy and mathematics D.improving his own skill as a sailor 38. The teachers in Prince Henry's school seem to have been____. A.members of the royal family B.astronomers,sailors and map makers C.shipbuilders D.All of the above 39. Prince Henry's goal was to design vessels that could____. A.make long deepsea voyages B.travel faster than those in use at that time C.explore the coastline of Portugal D.carry larger crews and more cargo than existing one 40. The best title for this passage is A.The First Modern Sailing Vessels B.The Mariner Prince C.Prince Henry's Role in History D.The First School for Sailors |
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