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CR强化(281-294)

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Many malarial symptoms other than the fever, which can be suppressed with antimalarial medication, can reappear within 120 days after the medication i

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In some cases, the parasite that causes malarial fever travels to cells of the spleen, which are less frequently eliminated from a person’s body than

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Participants who were depressed at the start of the study were no more likely to be smokers after one year than those who were not depressed.

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Some participants entered and emerged from a period of depression within the year of the study.

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Less fossil fuel was used to manufacture the machinery employed in the new technologies than was originally used to manufacture the machinery employed

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The amount of fossil fuel used to generate the electricity needed to power the new technologies is less than the amount that would have been used to p

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Not all the bats that use the mechanism described in the passage for dispersing heat in flight live in climates similar to the climate in which Sandac

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Other winged dinosaurs that flew only by gliding had networks of blood vessels in the skin of their wings similar to those that Sandactylus had.

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The first was used to support the conclusion drawn by hospital critics; the second states the position that the city official's argument opposes.

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The first states the position that the city official's argument opposes; the second states the conclusion of the city official's argument.

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The largest source of atmospheric pollutants in Torinia is not automobile emissions, but emissions from power plants.

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The manufacture and the scrapping of cars each generate significant amounts of air pollutants.

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Patrons who are under fi nancial pressure from their credit-card obligations tend to tip less when presented with a restaurant bill on a tray with a c

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The percentage of restaurant bills paid with a given brand of credit card increases when that credit card’s logo is displayed on the tray with which t

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Do a large percentage of the residents of Morganville currently do almost all of their shopping at stores in Morganville?

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In towns with healthy central shopping districts, what proportion of the stores in those districts suffer bankruptcy during a typical fi ve-year perio

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Nobody can gain access to a computer equipped with the software solely by virtue of skill at forging signatures.

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In many cases even authorized users are denied legitimate access to computers equipped with the software.

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At the end of its useful life, the film can be removed much more quickly than paint can.

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Even at speeds considerably higher than the normal speed of a passenger jet, the film remains securely attached.

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Test evacuations showed that putting on the smoke hoods added considerably to the overall time it took passengers to leave the cabin.

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Although the smoke hoods protect passengers from the toxic gases, they can do nothing to prevent the gases from igniting.

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A sample of the antibiotic was capable of killing bacteria in an environment with an unusually low concentration of salt.

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When lung tissue from people with cystic fibrosis is maintained in a solution with a normal salt concentration, the tissue can resist bacteria.

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The major causes of delays at the nation's busiest airports are bad weather and overtaxed air traffic control equipment.

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Over 60 percent of the takeoff and landing slots at the nation's busiest airports are reserved for commercial airlines.

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Many dental diseases produce symptoms that cannot be detected in a weekly self-examination.

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People who rarely brush their teeth are unlikely to perform a weekly examination of their mouth.

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