GWD-1-15 谢谢牛人指点！

yeisu

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.

why not C???

dadada007

这题我选D哦。答案是D么？

选C就不行了，C的意思是：还有其他种类的POTATO 比SPK004 含更丰富的beta-carotene ，眼下之意是要人PLANT其他类的POTATO，但是这个题的用意是要人接受这个PLANT SPK004从而让人们的营养更好。所以有两个意思，一，PLANT SPA004，2，可以有更多的营养，让人们更健康。

以上为偶的愚见/。

dadada007

SORRY ，说错，选A，答案是A么