GWD1-Q15

nysen

GWD1-Q15
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?

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.

答案为A 错选C  
C的错误原因是什么啊？

sdcar2010

Too strict. There might be one that is better than SPK004, but it might require stringent condition to grow, for example.

princesue

取非测试
C是干扰选项，假设有其他的种类，可以种比SPK004更rich的种类，但并不是说不可以种SPK004（比如其他品种可能水土不服，尽管实验室里种出来比SPK004更nutrient）
A选项，假设SPK004不能在这里flourish，那就不要搞了，题干结论直接不成立，因此是必要选项。

nysen

Too strict. There might be one that is better than SPK004, but it might require stringent condition to grow, for example.

-- by 会员 sdcar2010 (2011/5/28 19:46:04)

thx！

nysen

取非测试
C是干扰选项，假设有其他的种类，可以种比SPK004更rich的种类，但并不是说不可以种SPK004（比如其他品种可能水土不服，尽管实验室里种出来比SPK004更nutrient）
A选项，假设SPK004不能在这里flourish，那就不要搞了，题干结论直接不成立，因此是必要选项。

-- by 会员 princesue (2011/5/28 19:50:29)

thx！

潘giana

我做prep时遇到这道题，答案是D,怎么回事？

阿ceng

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.
【
思考过程
CQ=CRITICAL QUESTION
方案推理模式：
方案： encourage  farmers to plant a new variety of sweet potato called SPK004 (rich in beta-caroteneconvert into Vitamin A)
目的：improve nutrition
CQ1: 方案的可接受度=真的能plant 这些sweet potato吗
CQ2：方案的可行性=plant sweet potato真的能improve nutrition吗
CQ3：方案的正负作用
CQ4： 目标本身是否有问题
】
Which of the following, if true, most strongly supports the prediction that the plan will succeed?

A.        The growing conditions required by the varieties of sweet potato currently cultivated in the region are conditions in which SPK004 can flourish. （这里符合了CQ2思维：方案的可行性分析，SPK004真的能种在这个地方吗？答案是能的，是加强方向）
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. （跟这个没关系的，因为现在是在讨论plant sweet potato，而不是在讨论color and texture的问题）
C.        There are no other varieties of sweet potato that are significantly richer in beta-carotene than SPK004 is. （现在是在讨论这一款potato是否可行，而不应该扯到other potato）
D.        The varieties of sweet potato currently cultivated in the region contain some important nutrients that are lacking in SPK004. （这是一个削弱方向的，既然SPK004 lack something，那么方案就有副作用）
E.        There are other vegetables currently grown in the region that contain more beta-carotene than the currently cultivated varieties of sweet potato do. （和C有同样的错误，我们现在是在讨论SPK004是否会成功，不要扯到other vegetables上）