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.
首先要弄明白要达到的目的: 种植计划的推广成立的条件(这个东东外部的条件,因为内部条件有了,就是他的营养。).题目里面说,这个东西是人们的主食。
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.
新的东东与旧的相比色彩不同。无关。
c There are no other varieties of sweet potato that are significantly richer in beta-carotene than SPK004 is.
没有别的比这个新的更有beta营养。这个比较是无关的比较了,题目里面已经确定了要种这个新的。
d. The varieties of sweet potato currently cultivated in the region contain some important nutrients that are lacking in SPK004.
旧的比新的更有多出来的别的营养。不在考虑范围了,因为beta营养才是考虑的重点,而且提出的问题对计划有削弱作用。
e. There are other vegetables currently grown in the region that contain more beta-carotene than the currently cultivated varieties of sweet potato do.
其他正种植的蔬菜有的比正在种植的旧东东更多的beta。无关。
请指教~~~~~
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