| 四六级考试六级每日一练（2019/6/12） |
| 第1、2、3、4、5题：Icebergs are among nature's most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being-somewhere-in faraway, line frigid waters, amid thunderous noise and splashing turbulence, which in most cases no one hears or sees. They exist only a short time and then slowly away just as unnoticed. Objects of sheerest beauty, they have been called. Appearing in an endless variety of shapes, they may be dazzlingly white, or they may be glassy blue, green, or purple, tinted faintly or in darker hues. They are graceful, stately, inspiring-in calm, sunlit seas. But they are also called frightening and dangerous, and that they are in the night, in the fog, and in storms. Even in clear weather one is wise to stay at a safe distance away from them. Most of their bilk is hidden below the visible top. Also, they may roll over unexpectedly, churning the waters around them. Icebergs are parts of glaciers that break off, drift into the water, float about a while, and finally melt. Iceberg afloat today are made of anowflakes that have fallen over long ages of time. They embody snows that drifted down hundreds, or many thousands, or in some cases maybe a million year ago. The snows fell in polar regions and on cold mountains, where they melted only a little or not at all, and so collected to great depths over the years and centuries. As each year's snow accumulation lay on the surface, evaporation and melting caused the snowflakes slowly fell on the top of the old, it too turned to icy grains. So blankets of snow and ice grains mounted layer upon layer and were of such great thickness that the weight of the upper layers compressed the lower ones. With time and pressure from above, the many small ice grains joined and changed to larger crystals, and eventually the deeper crystals merged into a solid mass of ice. 46. Which of the following is the best title for the passage? A. The Name and Origin of Icebergs B. The Size and Shape of Icebergs C. The Dangers of icebergs D. The melting of Icebergs 47. The author states that iceberg are rarely seen because they are _____. A. broken by waves soon after they are found B. hidden beneath the mountains C. located in remote regions of the work D. surrounded by fog 48. In Para 5, line 6 the expression "from above" refer to _______. A. sunlit seas B. polar regions C. weight of mountains D. layers of ice and snow 49. According to the passage, icebergs are dangerous because they _____. A. usually melt quickly B. can turn over suddenly C. may create immense snowdrifts D. can cause unexpected avalanches 50. "Dazzlingly" in Para 2 line 2 probably means _____. A. brilliant B. faint C. beautify D. sick |
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| 第6题： He____his feet on the ground to shake off the snow from his boots before he entered the house. A.kicked B.stamped C.swayed D.stretched |
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| 第7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8题：Mr. Green has recently been（）of the company. A.appointed to president. B.appointed president C.appointed a president D.appointed the president |
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| 第9、10、11、12、13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14、15、16、17、18题：Heroin addictions today is found chiefly among young men of minority groups in ghetto(犹太人区)areas.Of the more than 60,000 known addicts,more than half live in New York State.Most of them live in New York City.Recent figures show that more than half of the addicts are under 30 years of age. Narcotic addiction in the United States is not limted to heroin users.Some middle-aged and older people who take narcotic drugs regularly to relieve pain can also become addicted.So do some people who can get drugs easily,such as doctors,nurses,and pharmacists.Studies show that this type of addict has personality and emotional problems very similar to those of other regular narcotic users. Many addicts admit that getting a continued supply is the main object of their lives.An addict's concentration on getting drugs often prevents continuing an education or working at a job.His health is often poor.He may be sick one day from the effects of withdrawal and sick the next day from an overdose.Statistics show that an addict's life span may be shortened by 15 to 20 years.The addict is usually in trouble with the family and almost always in trouble with the law. Some studies suggest that many of the known narcotic addicts had some trouble with the law before they became addicted.Once addicted,they may become even more involved with crime because it costs so much to support the heroin habit. Most authorities agree that the addict's involvement with crime is not a direct effect of the drug itself.Turning to crime is usually the only way to get that much money.The addicts' crimes are nearly always thefts or other crimes againstproperty. Federal penalties for illegal narcotics usage were established under the Harris on Act of 1914.The Act provides that illegal possession of narcotics is punishable by fines and/or imprisonment.Sentences can range from 2 to 10 years for the first offense,5 to 20 years for the second,and 10 to 20 years for further offenses. Illegal sale of narcotics can mean a fine of $20,000 and a sentence from 20 to 40 years for later offenses.A person who sells narcotics to someone under 18 is refused parole and probation,even for the first offense.If the drug is heroin,he can be sentenced to life imprisonment or to death. 21. What is the topic of this passage? • How to cure a drug addict. B.Heroin and narcotic. C. The harm of the drugs and the antidrug measures taken by the government. D.The American laws. 22. An addict cannot continue his eduction or work at a job,because of____ A.his concentration on getting drugs B.his personality C.his emotional problems D.his stortage of money 23. According to the author,how can the addicts get the money for drugs? A.Borrow from their families. B.By hard working. C.In an illegal way. D.The author doesn't mention it. 24. According to the author,who can get narcotic easily? A.Government men. B.Medical workers. C.The minorities. D.The Jews. 25. A person who sell heroin to a kid can be • fined $20,000. B. sentenced to 5 to 20 years in prison. C. sentenced to 20 to 40 years in prison. D. sentenced to death. |
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| 第19题：Theclimberwas（）fromthetopofthecliffonaropeheldbythisfriends. A.exhausted B.suspended C.relieved D.isolated |
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| 第20题： Can you （） how much it coats to feed the average family? A. work out B. work off C. work at D. work on |
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| 第21题：Everyone knows that the earth is spherical,（）? A.doesn't he B.doesn't she C.doesn't it D.don't they |
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| 第22题：（）theirhelp,wewouldn'thavesucceeded. A.Hadn'tbeenfor B.Haditnotbeenfor C.Ithadn'tbeenfor D.Hadn'titbeenfor |
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