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40        WEAKEN        there has been increasing publicity about the adverse long term effects on health of the caffeine in coffee        the decrease in coffee consumption must have been caused by consumers'awareness of the harmful dffects of caffeine        是其他原因或可能导致该结果(E)Coffee prices increased steadily in the past decade beause of unusually severe frosts in coffee-growing nations        call into:

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42        SUPPORT        Subway ridership is projected to increase by 20 percent over the next 10 years, The Mooreville Transit Authority plans to increase the number of daily train trps by only 5 percent over the same period.        Officials predict that this increase is sufficient to ensure that the incidence of delays due to crowding does not increase        是其他原因或可能导致该结果(D)Most of the projected increase in ridership is expected to occur in off-peak hours when trains are now sparesely used        ground:理论依据

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43        ASSUMPTION        Scrubbers will reduce harmful emissions more than cleaner-burning fuels will        northern power will be doing the most that can be done to reduce harmful emissions from its plants        找他因，排除推理中的WEAKNESS,将选项取非，原文结论不成立，则为正确选项(E) Aside from harmful emissions from the smokestacks of its plants, the activities of Nortern Power do not cause significant air pollution.        scrubber:a brush or other object used to clean something  smokestack:a chimney or funnel for discharging smoke from a locomotive, ship, factory, etc

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44        EVALUATION THE ARGUMENT        Trains can reach the channel more quickly than trucks, and freight cars can be transported to burland by barges that typically cross the channel in an hour.        To reduce shipping time, Trancorp plans to swich to trains and barges to transport goods to Burland        对答案的相反的回答能对原文结论起WEAKEN和SUPPORT作用©Whether loading the freight cars onto barges is very time cousuming

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45        WEAKEN        Some anthropologists study modern-day societies of foragers in an dffort to learn about out ancient ancestors who were also foragers. A flaw in this strategy is that forager societies are extremely varied.        any foragersociety with which anthropologists are familiar has had considerable contact with modern,non-forager societies.        割断因果：或有因无果或有果无因(A) All forager societies throughout history have had a number of important features in common that are absent from other types of societies

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46        METHOD OF REASONING                Even though prices and production amounts have also been stable during the last three years,sugarcane growers last year in creased thheir profits by more than 10 percent over the previous year's level        选项逻辑错误，直接排除。（A)many countries that are large consumers of sugarcane increased their production of sugarcane-based ethanol, yet their overall consumption of sugarcane decreased

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48        ASSUMPTION        If the county continues to collect residential trash at current levels, landfills will soon be overflowing and arklnad will need to be used in order to create more space.        cahrging each household will rotect the remaining county parkland        找他因，排除推理中的WEAKNESS©The collection fee will not induce residents to dump their trash in the parklands illegally        residential：designed for people to live in  induce:succeed in persuading or influencing (someone) to do something

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49        EVALUATION THE ARGUMENT        Wnen thesescaterpillars are fed mildweed leaves dusted with pollenfrom modified maize plants,they die.        by using genetically modified maize, farmers put monarch butterflies at risk.        对答案的相反的回答能对原文结论起WEAKEN和SUPPORT作用©Wheterh monarch butterfly caterpillars are actively feeding during the part of the growing season when maize is releasing pollen        modified:改良的, 改进的, 修正的 strain:竭尽全力，使（身体部位）充分发挥功能 maize：玉米

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50        ASSUMPTION        After-school hours spent playing computer games are hours not spent balking with people.        children who spend all their spare time playing these games have less experience in interpersonal communication than other children have.        SUPPORT（填补推理上的概念GAP），DEFENDER（排除WEAKEN结论的可能性，即排除他因）© Children who do not spend all of their after-school hours playing computer games spend at least some of that time talking with oter people

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51        SUPPORT        only the bonding agent degrades, leaving the small bits of plastic        no less plastic refuse per container is produced when such container are discarded than when comparable nonbiodegradable containers are discarde        没有其他原因或可能导致该结果(B)The partially biodegradable plastic beverage containers are made with more plastic than comparable nonbiodegradable ones in order to compensate for the weakening dffect of the bonding agents.        biodegradable:可生物降解的 beverage:（主要作商业用语）饮料  degrade:侮辱；轻视 cornstarch:玉米