请教GWD-1-Q15

chenkai

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?

 

1. The growing conditions required by the varieties of sweet potato currently cultivated in the region are conditions in which SPK004 can flourish.

2. 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.

3. There are no other varieties of sweet potato that are significantly richer in beta-carotene than SPK004 is.

4. The varieties of sweet potato currently cultivated in the region contain some important nutrients that are lacking in SPK004.

5. There are other vegetables currently grown in the region that contain more beta-carotene than the currently cultivated varieties of sweet potato do.

answer : A.

why not C?

poplars

窃以为C与A比起来，没有联系南非这一特殊地区的情况

paulstars

此题我也有疑问，可能C不如A好，在于C项里有个significantly的缘故。

other varieties可能也rich in beta-carotene，只是没那么significantly而已。

mao_gouhappy

这么一看我觉得c也没有错，只是我当时做得时候先看到a，就选了，没有继续看下面的选项。

沙罗双树的雨

C实际上是结论成立的必要条件，即结论成立的假设；假设和加强在某些情况下很相像，但是区别在于，加强的选项不必要突出其“必要性”，A和C都可以使结论成立，只是A使结论成立的概率加大了

yunia

A
    方案可行，措施达目的的类型，一般加强或者削弱答案中都会含有措施。

yunia

A
                        方案可行，措施达目的的类型，一般加强或者削弱答案中都会含有措施。

yunia

A 表明了方案可行,措施达到目的类型

hytulip

顶

anistonlucky

The answer should be to strenghten yourself, instead of weakening your components.