新prep cr 102 快考了求指导！

honoluluhono

102.(GWD 1-Q15)


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.
正确答案是E 我选了D
我选D是因为D的意思跟题干最后“since sweet potato is a staple of the region’s diet and agriculture, and the varieties currently grown contain little beta-carotene.

”逗号后面的内容意思相同，并且如果把D去非的话会weaken题干；另外E说的是其他important nutrients我把它看作是与题目无关的内容了 这样考虑哪里出了问题呢？
恳请各位NN伸出援助的小手啊，以前的帖子都只有一言两语 还是弄不明白啊

since sweet potato is a staple of the region’s diet and agriculture, and the varieties currently grown contain little beta-carotene.

”逗号后面的内容意思相同，并且如果把D去非的话会weaken题干；另外E说的是其他important nutrients我把它看作是与题目无关的内容了 这样考虑哪里出了问题呢？
恳请各位NN伸出援助的小手啊，以前的帖子都只有一言两语 还是弄不明白啊

honoluluhono

谢谢ls！

EVENINE

我也曾经错过，现在是这样理解的： 原文相关逻辑链：SPK004富含b+土豆是主食-->plan成功

D. There are no other varieties of sweet potato that are significantly richer in beta-carotene than SPK004 is.
D说没有其他品种的土豆比SPK004大大地富含b。原文的plan是“种SPK004”解决VA缺乏症，不管是否还有比SPK004更富含b的土豆，和“种SPK004”能否达到预期目的没有关系。所以我认为也是无关。


E. The currently cultivated varieties of sweet potato contain no important nutrients that SPK004 lacks.
E说现在种的土豆品种并不含有SPK004所缺乏的重要营养。如果说现在种的含有SPK004缺乏的重要营养，那如果改种SPK004，这些重要营养就没了，人们无法通过吃SPK004获得了。一种plan是否被采纳，一是能否达到目的，二是是否产生副作用（如果副作用过大，还不如不用）——这是个人总结的，做过一些题问为什么不采纳某某plan，正确答案往往是这个plan产生了不能接受的负面影响。

mandybabay

我也选了D 召唤各位大神解释。