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标题: [求助]gwd31-14-15, 先谢了！ [打印本页]

作者: glgry 时间: 2007-1-1 15:40
标题: [求助]gwd31-14-15, 先谢了！

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?

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.

这道题的答案是A

但我觉得这种potato和当地品种的生长茂盛条件是否一致不是最重要的，只要可以结果就行了。但B中的果肉能和其他potato很明显的区分更重要，这样大家才能分辨食用。否则，当地人可能吃很多potato还是没有得到足够的beta-carotene。我选了B。

请指教

作者: sm0421 时间: 2007-1-1 15:59

你的想法很另类哦，哈哈！

逻辑题嘛，就题论题最重要啦，引进的西红柿如果都无法在这里生长的话，那么就最糟糕啦。

题目的描述说SPK004西红柿那么好，所以还要能够在这里生长，才能有力的支持要引进的观点。

之后再说是否能够分辨的事吧。

作者: gonghao 时间: 2007-1-1 16:28

Telling the difference between the cultivated varieties and new ones has less links with the deficiency of v-A in south africa.

If the new pieces of plants could flourish in South Africa,the deficiency of V-A would relieve more than usual when current cultivated potatos that have low-level of V-B,which could convert into V-A in the body,were commonly planted in this region.

作者: glgry 时间: 2007-1-1 17:14

谢了，看来是我想多了。供大家课后一乐！

[此贴子已经被作者于2007-1-1 17:29:53编辑过]

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