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[Critical Reasoning]
试题详情
题目：
Agricultural societies cannot exist without staple crops. Several food plants, such as kola and okra, are known to have been domesticated in western Africa, but they are all supplemental, not staple, foods. All the recorded staple crops grown in western Africa were introduced from elsewhere, beginning, at some unknown date, with rice and yams. Therefore, discovering when rice and yams were introduced into western Africa would establish the earliest date at which agricultural societies could have arisen there.
选项:
A、People in western Africa did not develop staple crops that they stopped cultivating once rice and yams were introduced.
B、There are no plants native to western Africa that, if domesticated, could serve as staple food crops.
C、Rice and yams were grown as staple crops by the earliest agricultural societies outside of western Africa.
D、Kola and okra are better suited to growing conditions in western Africa than domesticated rice and yams are.
E、Kola and okra were domesticated in western Africa before rice and yams were introduced there.
答案:
A
提问：
请陆老师回答一下，感谢！这一题中是如何排除B的呢？B说因为没有主食是来源于西部非洲本地的，所以知道rice和jam被引进的时间就可以知道最早的农业社会是什么时候出现在那里的。觉得这个选项也不是重复premise，因为原文说的是Several food plants, such as kola and okra, are known to have been domesticated in western Africa, but they are all supplemental, not staple, foods.，而这里B说的是no plants native to western Africa that, if domesticated, could serve as staple food crops.，意思不完全一样。然后A为什么是assumption呢？感觉不明白这里的逻辑关系。
解答：
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阅读2015
提问：
请陆老师回答一下，感谢！这一题中是如何排除B的呢？B说因为没有主食是来源于西部非洲本地的，所以知道rice和jam被引进的时间就可以知道最早的农业社会是什么时候出现在那里的。觉得这个选项也不是重复premise，因为原文说的是Several food plants, such as kola and okra, are known to have been domesticated in western Africa, but they are all supplemental, not staple, foods.，而这里B说的是no plants native to western Africa that, if domesticated, could serve as staple food crops.，意思不完全一样。然后A为什么是assumption呢？感觉不明白这里的逻辑关系。
解答：
点赞2
阅读2016
提问：
原文说All the recorded staple crops grown in western Africa were introduced from elsewhere,感觉和意思沾边，因为B说没有本地植物被种作为staple food crops 正确答案A的意思看不太懂，好像是说不发展staple crops的时间问题，原文说发展staple crops没说不发展啊，请老师翻译一下A选项的准确意思，然后解释一下为啥A是原文的假设
解答：
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