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51.        A new study suggests that the conversational pace of everyday life may be so brisk that it hampers the ability of some children to distinguish discrete sounds and words and, as a result, to make sense of speech.
52.        Long before it was fashionable to be an expatriate, Josephine Baker made Paris her home, and she remained in France during the Second World War as a performer and an intelligence agent for the Resistance.
53.        The nineteenth-century chemist Humphry Davy presented the results of his early experiments in his "Essay on Heat and Light," a critique of all chemistry since Robert Boyle as well as a vision of a new chemistry that Davy hoped to found.
54.        The report recommended that the hospital eliminate unneeded beds, consolidate expensive services, and use space in other hospitals.
55.        Many house builder offer rent-to-buy programs that enable a family with insufficient savings for a conventional down payment to move into new housing and to apply part of the rent to a purchase later.

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56.        Many of the earliest known images of Hindu deities in India date from the time of the Kushan Empire and were fashioned either from the spotted sandstone of Mathura or from Gandharan grey schist
57.        It can hardly be said that educators are at fault for not anticipating the impact of microcomputer technology: Alvin Toffler, one of the most prominent student of the future,did not even mention microcomputers in Future Shock,published in 1970.
58.        A leading figure in the Scottish Enlightenmen, Adam Smith wrote two major books that are to democratic capitalism what Marx's Das Kapital is to socialism.
59.        The Olympic Games helped to keep peace among the pugnacious states of the Greek world，for a sacred truce was proclaimed during the month of festival.  
60.        While all states face similar industrial waste problems,the predominating industries and the regulatory environment of each states obviously determine the types and amounts of waste produced,as well as the cost of disposal.

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61.        Rivaling the pyramids of Egypt or even the ancient cities of the Maya as an achievement, the army of terra-cotta warriors created to protect Qin Shi Huang, China's first emperor,in his afterlife is more than 2,000 years old and took 700,000 artisans more than 36 years to complete.  
62.        When Congress reconvenes,some newly elected members from rural states will try to establish tighter restrictions on the amount of grain farmers will be allowed to grow and to encourage more aggressive sales of United States farm products overseas.

63.        The yield of natural gas from Norway's Troll gas field is expected to increase annually until the year 2005 and then to stabilize at six billion cubic feet a day, an extraction rate that will allow at least 50 years production.
64.        Doctors generally agree that such factors as cigarette smoking, eating rich foods high in fats, and alcohol consumption not only do damage by themselves but also aggravate genetic predispositions toward certain diseases.
65.        In a plan to stop the erosion of East Coast beaches, the Army Crops of Engineers proposed building parallel to shore a breakwater of rocks that would rise six feet above the waterline and act as a buffer, absorbing the energy of crashing waves and pretecting the beaches.

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66.        The 32 species that make up the dolphin family are closely related to whales and in fact include the animal known as the killer whale, which can grow to be 30 feet long and is famous for its aggressive hunting pods.
67.        Affording strategic proximity to the Strait Gibraltar,Morocco was also of interest to the French throughout the first half of the twentieth century because they assumed that without it their trip on Algeria would never be secure.
68.        The first trenches cut into a 500-acre site at Tell Hamoukar,Syria, have yielded strong evidence that centrally administered complex societies in northern regions of the Middle East arose simultaneously with but independently of the more celebrated city-states of southern Mesopotamia,in what is now southern Iraq.
69.        Once they had seen the report from the medical examiner, the investigators had no doubt that the body recovered from the river was that of the man who had attempted to escape from the state prison.
70.        His studies of ice-polished rocks in his Alpine homeland, far outside the range of present-day glaciers, led Louis Agassiz in 1837 to propose the concept of an age in which great ice sheets existed in what are now temperate areas.

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71.        Unlike the original National Museum of Science and Technology in Italy, where the models are encased in glass or operated only by staff members, the Virtual Leonardo Project,an online version of the museum,encourages visitors to "touch" each exhibit and thereby (to) activate the animated functions of the piece
72.        More and more in recent years,cities are stressing the arts as a means to greater economic development and investing millions of dollars in cultural activities, despite strained municipal budgets and fading federal support.
73.        Combining enormous physical strength with higher intelligence, the Neanderthals appear to have been equipped to face any obstacle the environment could put in their path, but their relatively sudden disappearance during the Paleolithic era indicates that an inability to adapt to some environmental change led to their extinction.
74.        A 1972 agreement between Canada and the United States reduced the amount of phosphates that municipalities are allowed to dump into the Great Lakes
75.        A proposal has been made to trim the horns from rhinoceroses to discourage poachers；the question is whether tourists will continue to visit game parks to see rhinoceroses once the animals' horns have been trimmed.

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76.        Retailers reported moderate gains in their November sales, as much because their sales a year earlier had been so bad as because shoppers were getting a head start on buying their holiday gifts.
77.        The only way for growers to salvage frozen citrus is to have it quickly processed into juice concentrate before warmer weather returns and rot the fruit.
78.        Fossils of the arm of a sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on the Greater Antilles Islands.
79.        Defense attorneys have occasionally argued that their client's misconduct stemmed from a reaction to something ingested, but if criminal or delinquent behavior is attributed to an allergy to some food, the perpetrators are in effect told that they are not responsible for their action.
80.        A report by the American Academy for the Advancement of Science has concluded that many of the currently uncontrolled dioxins to which North Americans are exposed come from the incineration of wastes.

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81.        Recently physicians have determined that stomach ulcers are caused not by stress, alcohol, or rich foods, but by a bacterium that dwells in the mucous lining of the stomach.
82.        According to a recent poll, owning and living in a freestanding house on its own land is still a goal of a majority of young adults, as it was of earlier generations.
83.        In 2000, a mere two dozen products accounted for half the increase in spending on prescription drugs, a phenomenon that is explained not just by the fact that drugs are becoming more expensive but also by the fact that doctors are writing many more prescriptions for higher-cost drugs.              
84.        Often visible as smog, ozone is formed in the atmosphere when hydrocarbons and nitrogen oxides, two major pollutants emitted by automobiles, react with sunlight.
85.        Salt deposits and moisture threaten to destory the Mohenjo-Daro excavation in Pakistan, the site of an ancient civilization that flourished at the same time as the civilizations in the Nile Delta and the river valleys of the Tigris and Euphrates.

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86.        The results of the company's cost-cutting measures are evident in its profits, which have increased 5 percent during the first 3 months of this year after falling over the last two years.
87.        In an effort to reduce their inventories, Italian vintners have cut prices; their wines are priced to sell, and they do.
88.        Jazz pianist and composer Thelonious Monk produced a body of work that was rooted in the stride-piano tradition of Willie(The Lion) Smith and Duke Elligton,yet in many ways he stood apart from the mainstream jazz repertory.
89.        Dirt roads may evoke the bucolic simplicith of another century, but financially strained townships point out that dirt roads cost twice as much to maintain as paved roads do.
90.        Although early soap operas were first aired on evening radio in the 1920s, they were moved to the daytime hours in the 1930s when the evening schedule became crowded with comedians and variety shows.

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91.        Nobody knows exactly how many languages there are in the world, partly because of the difficult of distinguishing between a language and the sublanguages or dialects within it, but those who have tried to count typically have found about five thousand.
92.        The energy source on Voyager 2 is not a unclear reactor, in which atoms are activity broken apart, but rather a kind of unclear battery that uses natural radioactive decay to produce power.
93.        Heating-oil prices are expected to be higher this year than last because refiners are paying about $5 a barrel more for crude oil than they were last year.

94.        The recent surge in the number of airplane flights has clogged the nation's air-traffic control system, leading to a 55 percent increase in delays at airports and prompting fear among some officials that safety is being compromised.
95.        The peaks of a mountain range,acting like rocks in a streambed, produce ripples in the air flowing over them；the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, is known as "standing waves".

胡子长了

96.        Nobody knows exactly how many languages there are in the world, partly because of the difficult of distinguishing between a language and the sublanguages or dialects within it, but those who have tried to count typically have found about five thousand.
97.        The energy source on Voyager 2 is not a unclear reactor, in which atoms are activity broken apart, but rather a kind of unclear battery that uses natural radioactive decay to produce power.
98.        Heating-oil prices are expected to be higher this year than last because refiners are paying about $5 a barrel more for crude oil than they were last year.

99.        The recent surge in the number of airplane flights has clogged the nation's air-traffic control system, leading to a 55 percent increase in delays at airports and prompting fear among some officials that safety is being compromised.
100.        The peaks of a mountain range,acting like rocks in a streambed, produce ripples in the air flowing over them；the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, is known as "standing waves".