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80        METHOD OF REASONING        special quality advantages are very hard to obtain these days and even harder to maintain        brand-name products generally neither offer higher quality nor sell at higher prices        排除出现原文没说过的东西的选项，包括新元素，极端化或夸张的元素，相反的元素，颠倒的元素(A) Brand names are taken by consumers as a guaratee of getting a product as good as the best rival products

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78        ASSUMPTION        3 percent of drivers on Maryland highways equippped their vehicles with radar detectors, 33 perent of all vehichles ticketed for exceeding the spend limit were equipped with them         drivers who equip their vehicles with radar detectors are more likely to eceed the speed limit regularly than are drivers who do not        SUPPORT（填补推理上的概念GAP)排除它因(B) Drivers who are ticketed for exceeding the speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed

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76        ASSUMPTION        No employee wants to be associated with bad news in the dyds of a superior, information about serious problems at lower levels is progressively softened and distorted as it goes up each step in the mamagement hierarchy        The chief executive is less well informed about prolems at lower levels than are his of her subordinates at fhose levels        SUPPORT（填补推理上的概念GAP)(D) chidf executives obtain information about problems at lower levels from no source other than their subordinates

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75        WEAKEN        Neighboring Country Y has experienced the same climatic conditions,but agricultural production has been falling in Country X, it has been rising in Country Y        An overly centralized economy is responsible for the poor agricultural production in Country X        是其他原因或可能导致该结果(D) The crops that have always been grown in Country X are different from those that have always been grown in Country Y

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74        EVALUATION THE ARGUMENT        convert heating systtems from oil to matural gas        reliace on foreign sources for fuel is likely to decline soon        对答案的相反的回答能对原文结论起WEAKEN和SUPPORT作用(D) Is the amount of oil used each year in Malvernia for generating electricity and fuel for transportation increasing ?

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73        WEAKEN        In compariosn the standard typewriter keyboard,which places the most-used kes nearest the typist's strongest finger allows faster typing and results in less fatigue.        replacement of standard keyboards with the EFCO keyboard will result in an immediate reduction of typing costs        割断因果：或有因无果或有果无因(D)The more training  and experience an employee has had with the standard keyboard, the more costly it is to train that emplyee to use the EFCO keyboard

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71        ASSUMPTION        moderate level of unemplyment is 5 percent,with one out of 20 workers unemployed.        at any given time if a person knows approximately 50workers, one or more will very likely be unemplyed        排除推理中的WEAKNESS (B)unemplyment is not normally concentrated in geographically isolated segments of the population

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70        JUSTIFY THE CONCLUSION        A moderate fever stimulates the activity of the body's disease-frighting white blood cells and also inhibis the growth of many strains of disease-causing bacteria        many doctors no longer routinely recommend its use for eliminate moderate feverassiciated with some illnesses        画出推理链或找出结论的新元素,(B)Aspirin can prolong a patient's illness by eliminating moderatefever helpful in fighting some diseases

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69        EVALUATION THE ARGUMENT        ordinary corn seed costs less and what theses farmers saved on insecticide rarelyexceeded their extra costs for seed.        for most feed-corn famers, switching to genetically modified seed would be unlikely to increase profits        用结论的具体性去区分有关无关,对答案的相反的回答能对原文结论起WEAKEN和SUPPORT作用

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68        SUPPORT        The local board of education found that, because the current physics curriculum has little direct relevance to today's world,physics classes attracted few high school students.        the board proposed a curriculum that emphasizes principles of physics invoved in producing and analyzing visual images        SUPPORT方式为两者本质相同.从一个侧面反映出可视化效果吸引人。(E)in today;s world the production and analysis of visual images is of major importance in communications,business, and recreation.