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PREP07 Test 1
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According to scientists at the University of Alaska, while the surface temperature of the globe has risen over the last century by about one degree Fahrenheit, the surface temperature in Alaska, Siberia, and northwestern Canada has increased in the previous thirty years by about five degrees.
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PREP07 Test 1 GWD
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On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.
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PREP07 Test 1
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According to a 1996 study published in the Journal of Human Resources, Americans of Middle Eastern descent were twice as likely as was the national average to be self-employed.
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PREP07 Test 1
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Despite there being no fundamental difference in shipbuilding traditions in Viking-Age Scandinavia from the ones in other parts of Northern Europe, archaeological evidence shows that Viking ships were lighter, slimmer, faster, and thus probably more seaworthy than the heavier vessels used by the English at that time.
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PREP07 Test 1 OG18-语文分册 OG19-语文分册 OG20-语文分册
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The computer company has announced that it will purchase the color-printing division of a rival company for $950 million, which is part of a deal that will make it the largest manufacturer in the office color-printing market.
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PREP07 Test 1
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Like English and Italian, each of which have elaborate rules for forming words and sentences, so sign languages have rules for individual signs and signed sentences.
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PREP07 Test 1
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As the former chair of the planning board for 18 consecutive years and a board member for 28 years, Joan Philkill attended more than 400 meetings and reviewed more than 700 rezoning applications.
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PREP07 Test 1
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She was an educator, a builder of institutions and organizations, and a major figure in the Black church and secular feminist movements as well, so one of the best-known and most well-respected African Americans of the early twentieth century was Nannie Helen Burroughs.
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PREP07 Test 1
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Unlike the other major planets, Pluto has a highly eccentric orbit, which is thus closer to the Sun than Neptune is for 20 years out of every 230-year cycle, even though it is commonly described as the remotest planet in the solar system.
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PREP07 Test 1
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One automobile manufacturer has announced plans to increase the average fuel efficiency of its sport utility vehicles by 25 percent over the next five years, amounting to roughly five miles per gallon, and representing the first significant change in the fuel efficiency of any class of passenger vehicle in almost two decades.
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PREP07 Test 1
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It is possible that, like the Volkswagen, whose unchanging exterior over decades concealed many changes in its internal machinery, the evolution of many prehistoric microbes occurred with no significant modification to their sheaths.
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PREP07 Test 2
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Defying efforts by policymakers on both sides of the Atlantic at restraining it, the United States dollar, continuing its rise, reaching its highest level in six years against the German mark.
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PREP07 Test 2
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From studies of the bony house of the brain, which is the cranium, located in the back of the skull, come what scientists know about dinosaur brains.
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PREP07 Test 2
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The Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk as one in a million chances to cause cancer.
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PREP07 Test 2
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Nine months after the county banned jet skis and other water bikes from the tranquil waters of Puget Sound, a judge overturned the ban on the ground of violating state laws for allowing the use of personal watercraft on common waterways.
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PREP07 Test 2
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The success of the program to eradicate smallpox has stimulated experts to pursue what they had not previously considered possible--better control, if not eradication, of the other infections such as measles and yaws.
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PREP07 Test 2 OG18-语文分册 OG19-语文分册 OG20-语文分册
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Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1967 by graduate student Jocelyn Bell, it had not been announced until February, 1968.
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PREP07 Test 2
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Some anthropologists regard the early hominids' manner of walking as being less efficient than in modern human beings.
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PREP07 Test 2
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Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts from the pituitary glands of human cadavers.
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PREP07 Test 2
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The new image of Stone Age people as systematic hunters of large animals, rather than merely scavenging for meat, have emerged from the examination of tools found in Germany, including three wooden spears that archaeologists believe to be about 400,000 years old.
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