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单选题Questions 19 to 21 are based on the conversation you have just heard.

单选题{{B}}Passage One{{/B}} When risk of death from heart attack is plotted on a graph against alcohol consumption, studies consistently show a U-shaped curve, which suggests that non-drinkers and heavy drinkers have higher rates of heart disease than light to moderate drinkers. The implication is that moderate drinking offers protection from heart disease. For years, doctors believed that the death rate among people who do not drink at all was artificially high because it included a substantial number of reformed drinkers, irreparably damaged by alcohol. However, more recent studies which separate life-long drinkers from abstainers have shown that abstainers are still at high risk. Studies have shown that moderate drinkers have higher levels of high-density lipoproteins (脂蛋白) in their blood. This is the "good" cholesterol that protects against heart disease. Alcohol also appears to reduce the risk of heart diseases. Though drinking alcohol in moderation undoubtedly brings some benefits, it is important not to play down the dangers of heavy drinking. Alcohol is related to a string of health problems including cirrhosis (硬化) of the liver, cancer of the mouth, high blood pressure and hemorrhage stroke. Some people believe that wine, in particular, has additional beneficial properties that set it apart from other alcoholic drinks. The French have significantly less heart disease than does any other industrialized nation except Japan. For example, in Toulouse, France, the annual heart disease death rate per 100,000 men is 78--barely a fifth of the number in Glasgow, Scotland. French doctors believe that the low rate of heart disease is a result of the fact that the French consume large quantities of wine. The relationship between alcohol consumption and the risk of developing cancer has also been studied. Population studies suggest that people who drink moderately are at less risk than those who do not drink at all. Again, wine may be largely responsible for the benefits. Other research suggests that drinking moderate amounts of alcohol also reduces the risk of catching everyday infections like colds. A recent study showed that drinking two units of alcohol dally can halve susceptibility to infections.

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单选题 {{B}}Passage ThreeQuestions 32 to 35 are based on the passage you have just heard.{{/B}}

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单选题 {{B}}Passage OneQuestions 26 to 28 are based on the passage you have just heard.{{/B}}

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单选题A.ThewomanshouldrepairtheTV.B.ThewomanshouldbuyanewTV.C.ItisworthwhiletorepairtheoldTV.D.ThewomanshouldabandontheTV.

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单选题{{B}}Passage One{{/B}} Humans are forever forgetting that they can't control nature. Exactly 20 years ago, a magazine cover story announced that "scientists are on the verge of being able to predict the time, place and even the size of earthquakes". The people of quake-ruined Kobe learned last week how wrong that assertion was. None of the methods praised two decades ago have succeeded. Even now, scientists have yet to discover a uniform warning signal that precedes all quakes, let alone any sign that would tell whether the coming quake is mild or killer. Earthquake formation can be triggered by many factors, says Hiroo Kanamori, a seismologist (地震学家) at the California Institute of Technology. So, finding one all-purpose warning sign is impossible. One reason: Quakes start deep in the earth, so scientist can't study them directly. If a quake precursor (预兆) were found, it would still be impossible to warn humans in advance of all dangerous quakes. Places like Japan and California are filled with hundreds, if not thousands, of minor faults. It is impossible to place monitoring instruments on all of them. And these inconspicuous sites can be just as deadly as their better-known cousins like the San Andreas. Both the Kobe and the 1994 Northridge quakes occurred on small faults. Prediction would be less important if scientists could easily build structures to withstand every new quake reveals unexpected weaknesses in "quake-resistant" structure, says Terry Tullis, a geophysical at Brown University. In Kobe, for example, a highway that opened only last year was damaged. In the Northridge earthquake, on the other hand, well-built structures generally did not collapse. But engineers have since found hidden problems in 120 steel-frame buildings that survived. Such structures are supposed to sway with the earth rather than crumple (崩溃). They may have swayed, but the quake also unexpectedly weakened the joints in their steel skeletons. If the shaking had been longer or stronger, the buildings might have collapsed. A recent report in Science adds yet more anxiety about life on the fault lines. Researchers can computer simulations to see how quake-resistant buildings would fare in a moderate-size tremor, taking into account that much of a quake's energy travels in a large "pulse of focused shaking". The results: Both steel-frame buildings and buildings that sit on insulating rubber pads suffered severe damage. More research will help experts design stronger structures and possibly find quake pressures. But it is still a certainty that the next earthquake will prove once again that every fault cannot be monitored and every highway cannot be completely quake-proofed.

单选题 People all over the world write to Big Ben. They{{U}} {{U}} 1 {{/U}} {{/U}}send birthday presents. Big Ben is not a{{U}} {{U}} 2 {{/U}} {{/U}}. It's a clock! Big Ben is the great clock{{U}} {{U}} 3 {{/U}} {{/U}}up in a tower of the Parliament building. This is the building in London where laws are{{U}} {{U}} 4 {{/U}} {{/U}}. The people of London like to see Big Ben's four friendly faces. They like to hear the chimes{{U}} {{U}} 5 {{/U}} {{/U}}. 15 minutes. They like to hear the bell{{U}} {{U}} 6 {{/U}} {{/U}}on the hour. Bong! Bong! Bong! Big Ben's story started in 1834. In that year the old parliament building burned{{U}} {{U}} 7 {{/U}} {{/U}}. Its clock tower crashed to the ground. There (74) to be a new building—and a new clock. Plans were made. They called{{U}} {{U}} 8 {{/U}} {{/U}}a "King of Clocks, the biggest and best in the world". So the clock had to be big. And it had to{{U}} {{U}} 9 {{/U}} {{/U}}very good time. In two years the big clock was made. Five more years went by{{U}} {{U}} 10 {{/U}} {{/U}}the clock tower was finished. Then the four bells for the chimes were brought into the tower. And at last the giant hour bell was put in{{U}} {{U}} 11 {{/U}} {{/U}}. It rang our for the first time{{U}} {{U}} 12 {{/U}} {{/U}}July 11, 1859. This great bell had to{{U}} {{U}} 13 {{/U}} {{/U}}a name. A meeting of Parliament was called to pick{{U}} {{U}} 14 {{/U}} {{/U}}. "This clock is the King of Clocks," one man said. "Let's call the bell the Queen of Bells." "Then why not Victoria?" said{{U}} {{U}} 15 {{/U}} {{/U}}. (Victoria was the British queen at that time) The talk about names went{{U}} {{U}} 16 {{/U}} {{/U}}. Then Benjamin Hall got up to speak. He was a big man that others liked. By this time they were all{{U}} {{U}} 17 {{/U}} {{/U}}. Some one shouted, "Why not call it Big Ben and be done{{U}} {{U}} 18 {{/U}} {{/U}}it?" Everybody laughed, and the meeting broke up. But Big Ben it was from then on. Not just the bell{{U}} {{U}} 19 {{/U}} {{/U}}the whole clock.