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PREP07 Test 2
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Like the great navigators who first sailed around the Earth, to gather information about its size and curvature of its surface, new observations have been made by astronomers that show with startling directness the large-scale geometry of the universe.
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PREP07 Test 2
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According to one expert, the cause of genetic irregularities in many breeds of dog is not so much that dogs are being bred for looks or to meet other narrow criteria as that the breeds have relatively few founding members.
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PREP07 Test 2
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Once made exclusively from the wool of sheep that roam the Isle of Lewis and Harris off the coast of Scotland, Harris tweed is now made only with wools that are imported, sometimes from the mainland and sometimes they come--as a result of a 1996 amendment to the Harris Tweed Act--from outside Scotland.
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PREP07 Test 2 OG18-语文分册 OG19-语文分册
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The gyrfalcon, an Arctic bird of prey, has survived a close brush with extinction; its numbers are now five times greater than when the use of DDT was sharply restricted in the early 1970's.
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PREP07 Test 2
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Hydrocarbons, with which fruit flies perfume themselves in species-specific blends, are known to be important in courtship, and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of others.
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PREP08 Test 1
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Experts estimate that ten times as much petroleum exists in sources like tar sands, heavy oil, and perhaps even in shale than in conventional reservoirs.
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PREP08 Test 1
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For at least two decades or more previous to when the Venetian artist Giovanni Battista Tiepolo died in 1770, he was the most admired painter in Italy.
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PREP08 Test 1
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Unlike George Wallace in 1968 and John Anderson in 1980, both of whom running as independent candidates, H. Ross Perot's independent run for the presidency in 1992 arose not from an unsuccessful effort to gain a major party nomination but from a desire to establish a viable third party in American politics.
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PREP08 Test 1
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The organic food industry has organized a successful grassroots campaign-using Web sites, public meetings, and also mass mailings-that have convinced the Department of Agriculture to change the proposed federal regulations for organically grown food.
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PREP08 Test 1
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Whereas the honeybee's stinger is heavily barbed and cannot be retracted from the skin, because the yellow jacket has a comparatively smooth stinger, it is therefore able to be pulled out and used again.
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PREP08 Test 2
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With surface temperatures estimated at minus 230 degrees Fahrenheit, Jupiter's moon Europa has long been considered far too cold to support life, and with 60 square miles of water thought to be frozen from top to bottom.
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PREP08 Test 2
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The striking differences between the semantic organization of Native American languages and that of European languages, in both grammar and vocabulary, have led scholars to think about the degree to which differences in language may be correlated with nonlinguistic differences.
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PREP08 Test 2
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Mixed with an equal part of water, ethylene glycol, a compound commonly used as an automotive antifreeze, is effective at temperatures as low as –30 degrees Fahrenheit.
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While Jackie Robinson was a Brooklyn Dodger, his courage in the face of physical threats and verbal attacks was not unlike that of Rosa Parks, who refused to move to the back of a bus in Montgomery, Alabama.
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There is no consensus on what role. if any, is played by acid rain in slowing the growth or damaging forests in the eastern United States.
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Critics of the trend toward privately operated prisons consider corrections facilities to be an integral part of the criminal justice system and question if profits should be made from incarceration.
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Congress is debating a bill requiring certain employers provide workers with unpaid leave so as to care for sick or newbom children.
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OG18-语文分册
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Growing competitive pressures may be encouraging auditors to bend the rules in favor of clients; auditors may, for instance, allow a questionable loan to remain on the books in order to maintain a bank's profits on paper.
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The National Transportation Safety Board has recommended the use of fail-safe mechanisms on airliner cargo door latches assuring the doors are properly closed before takeoff and to prevent them from popping open in flight.
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From the bark of the paper birch tree the Menomini crafted a canoe about twenty feet long and two feet wide, with small ribs and rails of cedar, which could carry four persons or eight hundred pounds of baggage so light that a person could easily portage it around impeding rapids.
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