问一道GWD9-40西非农业社会的问题

积累rp小火星 · 发表于 2012-3-26 11:19:33

GWD-9-Q40:

Agricultural societies cannot exist without staple crops.Several food plants, such as kola and okra, are known to have been domesticatedin western Africa, but they are allsupplemental, not staple, foods. All the recorded staple crops grown in westernAfrica

were introduced from elsewhere,beginning, at some unknown date, with rice and yams. Therefore, discoveringwhen rice and yams were introduced into western Africawould establish the earliest date at which agricultural societies could havearisen there.

Which of the following is an assumption on which theargument depends?

A. People in western Africadid not develop staple crops that they stopped cultivating once rice and yamswere introduced.

B. There are no plants native to western Africa that, if domesticated, could serve as staple foodcrops.

C. Rice and yams were grown as staple crops bythe earliest agricultural societies outside of western Africa.

D. Kola and okra are better suited to growingconditions in western Africa than domesticatedrice and yams are.

E. Kola and okra were domesticated in western Africa before rice and yams were introduced there.

我选的B，答案是A
B应该错在题目中已经强调了所有的主食，选项中的意思与题中的意思重复
A应该怎么解释呢？好像之前的帖子关于这道题的很少
求各路NN解释！

积累rp小火星 · 发表于 2012-3-26 12:28:54

木有人鸟我==
难道是因为太简单了么~。~
热心的NN们赐教啊

xn8510 · 发表于 2012-3-26 23:52:18

我的理解：
选项A的含义是：当rice和yams被引进的时候，人们便停止了对主食的培育，并且日后也没再对这些尚未培育成功的主食继续培育。话中隐含的意思是：在rice和yams主食被引进之前，人们已经开始自己种植培育主食，只是还没等成功，rice和yams便作为主食被引进了，至此，人们便终止了对自己的主食的培育。可以看出，人们自己培育主食的开始时间点，早于rice和yams被引进的时间点。

本题的逻辑链：因为所有生长在西非的主食是从外面引进的rice和yams——所以，追溯rice和yams的引进时间，可以推测出农业社会的诞生时间。

对选项A取not：如果，当它们被最早引进的时候，人们没有停止培育自己的主食，那么，当自己培育主食成功后，rice和yams便不是最早出现在西非社会的主食了。因此，再追溯rice和yams的引进时间便没有了意义，结论不成立。

因此，A选项便是该结论所依赖的假设。

泾渭不凡 · 发表于 2012-4-11 10:57:57

我的理解：
选项A的含义是：当rice和yams被引进的时候，人们便停止了对主食的培育，并且日后也没再对这些尚未培育成功的主食继续培育。话中隐含的意思是：在rice和yams主食被引进之前，人们已经开始自己种植培育主食，只是还没等成功，rice和yams便作为主食被引进了，至此，人们便终止了对自己的主食的培育。可以看出，人们自己培育主食的开始时间点，早于rice和yams被引进的时间点。

本题的逻辑链：因为所有生长在西非的主食是从外面引进的rice和yams——所以，追溯rice和yams的引进时间，可以推测出农业社会的诞生时间。

对选项A取not：如果，当它们被最早引进的时候，人们没有停止培育自己的主食，那么，当自己培育主食成功后，rice和yams便不是最早出现在西非社会的主食了。因此，再追溯rice和yams的引进时间便没有了意义，结论不成立。

因此，A选项便是该结论所依赖的假设。

-- by 会员 xn8510 (2012/3/26 23:52:18)

这道题前辈分析的很透彻，谢谢！

不过感觉前辈讲A选项取非之后的翻译总感觉不是很完全(表蓝处)，我自己翻译过后= =更乱。。。

求A选项取非之后的原句理解。。

这道题有点颠覆偶做assumption的一贯方法哎....求NN...

泾渭不凡 · 发表于 2012-4-12 15:51:12

sarah9142 · 发表于 2012-4-12 18:49:13

-- by 会员泾渭不凡 (2012/4/12 15:51:12)

泾渭不凡 · 发表于 2012-4-13 06:15:26

sarah。那个前辈对A的解释很明白咯。。饭饭不知道你现在哪处不懂哈~~

。。饭饭就是把它取非之后翻译残了。。

。。最后一顶。。在米有人回应就弃了。。

高歌1990 · 发表于 2012-7-12 16:34:43

我感觉取非后应该这么翻译：西非人曾经发展过一种主要作物，而这种作物在rice引入后就停止种植了。意思就是说在引入之前种过某种主要作物，削弱了题目。

zizibaobao11141 · 发表于 2013-7-2 00:30:51

我是这么看的
原文逻辑链成立的前提如果是A的话就意味着NOT A 逻辑链就不存在
如果我们取非来看引进之前就有自己的staple food 那么结论就推不出来
如果我们就按照A的语序来看人们没有发展出来staple food 就停止了就不种了就用rise了主要是对develop 的理解
这道题真正强调的就是引入的那个时间B选项并没有涉及这个点如果加上一定的时间限定的话 B选项的可选性就增加了

edifier1990 · 发表于 2013-10-26 15:12:17

官方解释，希望有所帮助，虽然我觉得官方解释也不是很好理解。
Reasoning:
What must be true in order for the given information to justify the conclusion that knowing when rice and yams arrived in western Africa would establish the earliest date that agricultural societies could have arisen there? The argument is that agricultural societies require staple crops, and there were no recorded staple crops in western Africa before rice and yarns were introduced there. Therefore, no agricultural societies could have arisen there before rice and yams were introduced. This assumes there were no unrecorded staple crops in western Africa before rice and yams. Therefore, look for an answer option that expresses or follows from this assumption.

A. correct. This follows from the assumption discussed above, that there were no earlier, unrecorded staple crops in western Africa before rice and yams.
B. The argument assumes that no plants actually were domesticated as staple crops in western Africa, not that there are no plants suitable for such domestication.

官方解释的assumtion是在rice和yams到达西非之前，西非没有未记录的staple crops。对A取非，也就是如果有未记录的staple crops的话，可以证明西非rice和yams之前就进入农业社会了。

问一道GWD9-40西非农业社会的问题

我也是选B。。。看不懂A。。。

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