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题库 / OG2017V-CR-116
In parts of South America, vitamin-A deficiency is a serious health problem, especially among children. In one region, agriculturists are attempting to improve nutrition by encouraging farmers to plant a new variety of sweet potato called SPK004 that is rich in beta-carotene, 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?
The growing conditions required by the varieties of sweet potato currently cultivated in the region are conditions in which SPK004 can flourish.
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.
There are no other varieties of sweet potato that are significantly richer in beta-carotene than SPK004 is.
The varieties of sweet potato currently cultivated in the region contain some important nutrients that are lacking in SPK004.
There are other vegetables currently grown in the region that contain more beta-carotene than the currently cultivated varieties of sweet potato do.
方案题：计划：引进名为SPK004的土豆；目标：解决VA缺乏症（B产物可以转化成VA）
CQ：计划的可行性，可实施性，副作用，目标的不合理性 答案大概率需要对方案进行examine
• AThe growing conditions required by the varieties of sweet potato currently cultivated in the region are conditions in which SPK004 can flourish. 现有的种植土豆的地，SPK004也可以种（取非削弱，种不了的话就是可实施性不行），加强选项
• BThe 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. 跟外表无关
• CThere are no other varieties of sweet potato that are significantly richer in beta-carotene than SPK004 is. 取非，there are others better, 其实是个无关选项，我们现在在聊SPK004土豆能不能达到效果，不管他是不是最有营养的土豆，只要评估方案是不是有效，是不是可实施，有没有副作用
• DThe varieties of sweet potato currently cultivated in the region contain some important nutrients that are lacking in SPK004. 我只管你能不能治好我的VA缺乏症
• EThere are other vegetables currently grown in the region that contain more beta-carotene than the currently cultivated varieties of sweet potato do. 提出新方案，无关
D是一个削弱，方案推理，选择A
A 方案可行性
C 没有其他品种的土豆比SPK004的那个营养更丰富。文段讨论SPK004能否达到目标，就算不是营养最丰富的，还是可以再一定程度上达到目标。
方案推理，A：CQ2方案可接受性
最后一句 and the varieties currently grown contain little beta-carotene中的“the” 指代的是其他品种的sweet potato还是所有其他种类的食物？这个地区的人缺乏维他命A，所以应该原有的所有食物中beta-carotene含量都很低吧？所以CE是不支持计划的
C 其他品种好不好和种SPK004能不能达成目标无关