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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?

正确答案: E

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楼主
发表于 2011-8-29 22:04:17 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
102.    (29392-!-item-!-188;#058&004074)    (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.


答案E


主要问题是DE两个选项,我选了D,我认为”没有其他品种的甜土豆比SPK004的beta胡萝卜素含量明显高“,确实是对原文plan的增强呀。E说”目前种植的甜土豆品种不含有SPK004所缺乏的重要营养物质“,怎么支持原文plan会成功呢?


求高手解答!
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沙发
发表于 2011-8-29 22:12:13 | 只看该作者
E选项:如果旧品种含有新品种不含有的重要营养物质,那么新取代旧就不好了。我说的比较通俗,LZ意会吧。
再问一下,LZ720了问什么还要考?
板凳
 楼主| 发表于 2011-8-30 11:01:20 | 只看该作者
哦~~理解了,正面想不明白可以从反面来考虑!灰常感谢!至于第二个问题嘛,追求无极限嘛!
地板
发表于 2011-8-30 11:05:11 | 只看该作者
哦~~理解了,正面想不明白可以从反面来考虑!灰常感谢!至于第二个问题嘛,追求无极限嘛!
-- by 会员 sunspirit2011 (2011/8/30 11:01:20)



无极限?~~~~~~~~你要一直考一直考一直考,考到800么~~~~~~~~~~佩服~~~~~~~~~
5#
 楼主| 发表于 2011-8-30 16:49:51 | 只看该作者
额。。。那倒不是。想再考一次看,还能考高点的话最好。考过第一次后觉得自己还有提高空间的,所以再试试嘛。
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