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一道support 题目 想请问下选项D 错在哪里？？ 如果用herl方法来归类，该题目是归类到【方案推理】吗？ 思路应该怎么想呢？ 希望各位G友多多来指导一下，互相交流， 谢谢！
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.
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发表于 2019-3-6 15:41:10
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