※ 引述《tremendous (keepgoing)》之銘言： : In parts of South America, vitamin-A deficiency is a serious health problem, : especially among children. In one region, agriculturists hope to improve : nutrition by encouraging farmers to plant a new variety of sweet potato : called SPK004 that is rich in betacarotene, which the body converts into : vitamin A. The plan has good chances of success, since sweet potato is a : staple of the region's diet and agriculture, and the varieties currently : grown contain little beta-carotene. : Which of the following, if true, most strongly supports the prediction that : the plan will succeed? : A. There are other vegetables currently grown in the region that contain more : beta-carotene than the currently cultivated varieties of sweet potato do. : B. The flesh of SPK004 differs from that of the currently cultivated sweet : potatoes in color and texture, so traditional foods would look somewhat : different when prepared from SPK004. : C. For successful cultivation of SPK004, a soil significantly richer in : nitrogen is needed than is needed for the varieties of sweet potato currently : cultivated in the region. : D. There are no other varieties of sweet potato that are significantly richer : in beta-carotene than SPK004 is. : E. The currently cultivated varieties of sweet potato contain no important : nutrients that SPK004 lacks. : 答案E : 大意是為改善南美某地區的維生素a不足，所以要種植可以轉換成維生素a的甜芋 spk004 : 提供給當地民眾，而剛好民眾的主食及農作物是甜芋，因此這個計劃可以成功 : 這題是GWD1-Q15的變形題 : 我選D，認為沒有其他品種的甜芋有更高的beta-carotene 因此種植SPK004當然會成功會 : 達成轉換維生素a給民眾的任務，是個很好support啊 : 而答案E我以為是無關選項，想不通現在種植的甜芋品種和種植SPK004的連結點，這選項為什 : 麼可以支持呢？ 答案E，現在的作物沒有含有任何SPK004缺少的營養。 光看字面實在很難發現什麼， 但取非， 現在的作物含有重要的營養是SPK004缺少的， 這樣一來改種SPK004變成顧此失彼，可以weaken。 所以E是assumption的題型概念。 答案D我也覺得可以support，可是要選most的話，E是比較適合。 有請其他強者指導一下D選項應該怎麼排除呢? 重述前提?? --

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