In partsof South America, vitamin-A deficiency is a serious health problem, especiallyamong children. In one region,agriculturists hope to improve nutrition by encouraging farmers to plant a newvariety of sweet potato called SPK004 that is rich in betacarotene, which thebody converts into vitamin A. The planhas good chances of success, since sweet potato is a staple of the region’sdiet and agriculture, and the varieties currently grown contain littlebeta-carotene.Which ofthe following, if true, most strongly supports the prediction that the planwill succeed? A. Thereare other vegetables currently grown in the region that contain morebeta-carotene than the currently cultivated varieties of sweet potato do. B. Theflesh of SPK004 differs from that of the currently cultivated sweet potatoes incolor and texture, so traditional foods would look somewhat different whenprepared from SPK004. C. Forsuccessful cultivation of SPK004, a soil significantly richer in nitrogen isneeded than is needed for the varieties of sweet potato currently cultivated inthe region. D. Thereare no other varieties of sweet potato that are significantly richer inbeta-carotene than SPK004 is. E. Thecurrently cultivated varieties of sweet potato contain no important nutrientsthat SPK004 lacks.
然后在GWD-1-Q15中，题目是一摸一样的，但是选项不一样：A.The growing conditions required by the varieties of sweet potato currently cultivated in the region are conditions in which SPK004 can flourish. 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.There are no other varieties of sweet potato that are significantly richer in beta-carotene than SPK004 is. D.The varieties of sweet potato currently cultivated in the region contain some important nutrients that are lacking in SPK004. E. There are other vegetables currently grown in the region that contain more beta-carotene than the currently cultivated varieties of sweet potato do.
在GWD的订正里面，有这样的解答： 以下是引用mko在2006-1-273:43:00的发言：
题问的是:支持SPK004在那片土地上种植成功 A, SPK004在那片土地上的种植条件都符合了 C, SPK004有最多的BC. C是无关选项,因为只要种植成功就达到目的,是否含有最多的BC并不是成功的关键.反过来说,即使BC含量最多,SPK004也有可能无法在那片土地种植成功. (not以后也不weaken) skyinseas按照lawyer大牛的理论：这道题的结论的特殊性和具体性在：某种物质的营养成分和计划成功，c只是比较营养成分，没有影响到计划的成功与否。 http://forum.chasedream.com/dispbbs.asp?boardid=24&replyid=591543&id=63733&page=1&skin=0&Star=3 先做了GWD的我，记得这个解释之后，在Prep1中偶遇这道题，但是发现好像没有跟GWD里面很一样的，就选了个意思差不多的C. 但Prep很明确地告诉我，答案是E。The currently cultivated varieties of sweet potato contain no important nutrients that SPK004 lacks.。 那我就纠结了，因为我个人还是挺赞同GWD订正里面的人的解释~ 然后再看了很多关于这个题目的帖子，发现有的人又说正确答案是Prep中的D。There are no other varieties of sweet potato that are significantly richer in beta-carotene than SPK004 is.
经过一翻挣扎之后，我就纠结了，究竟哪个解释才比较合理？？？跪请各位XDJM们解答解答~谢谢！！！作者: 冰城恋 时间: 2011-5-8 09:40
顶起。我也刚做到。。纠结中啊作者: kikisunflower 时间: 2011-5-8 10:27
觉得选E：The currently cultivated varieties of sweet potato contain no important nutrients that SPK004 lacks
A. 现有的其他蔬菜也含b（题目里说了，sweet potato is a staple of the region’s diet and agriculture，但是A选项却没说其他含b的蔬菜是不是也能被人们接受；如果这种蔬菜并不是人们餐桌上常见的菜品，那它不管含什么不得了的营养元素，也达不到普遍提高人们营养水平的目的。所以A错）
B. 说新番茄和以前的番茄长得不一样（我猜这是不是想暗示，因为长得不一样，所以不太容易被人接受？或者人们会因为新鲜感去买？不知道，反正没说清楚，判为无关选项）
C. 又是种植条件的问题（先放一放，如果后面都没有什么更重要的support了，就选这个了）
D. 说现有的番茄含b量都没有新番茄多（觉得这是句废话，按常理的话，就是因为现有的番茄含b量低，才出现了这个旨在提高b含量的plan；不过即使现有的番茄里面就有含b量很高的，也没关系，就当农业学家们做了一番无用功，本来可以用普通番茄解决的营养问题，还非要培育新品种来解决。但是他们的计划依然可以说是成功的，经历一番周折，也还是可以提高人们的营养水平）
E. 暗示新番茄没有什么营养缺陷（含丰富的b，可以解决VA缺乏的问题，又不缺其他重要的营养元素，新番茄很给力，support了；回过头去对比下C，肯定是E更重要一些，因为有了E，才有考虑C的价值）作者: kathyyoung 时间: 2011-5-8 10:53
有道理~~~我当初做GWD的时候，也是按照这种想法，所以做GWD的时候，我就选了C.There are no other varieties of sweet potato that are significantly richer in beta-carotene than SPK004 is. 但后来看了分析之后，觉得种植条件许可才保证了成功，好像也有道理。 但是在真正遇到这样的题目，好像有两个选项都能够说得过去的时候，我就不知道要用什么样的标准去衡量一个更加正确的选项了。像这道题一样，有的人说成功关键，在于能不能种植成功，连种都种不成，什么营养都是扯谈。但另外又有人说，因为政府的原意是要提高营养水平，所以新品种是营养很高，其他任何品种都不会比它更好，所以选赞新品种的，就是support了。 作者: kathyyoung 时间: 2011-5-8 10:55
但是既然，prep告诉我们，GMAC的正确思路是，说新品种营养高，旧的没有比它更好的，所以，这道题，就暂时按照它的思路…………但实战中，还是会纠结………………作者: kikisunflower 时间: 2011-5-8 11:09
不要纠结，我觉得这道题非常清楚。