21. (28551-!-item-!-188;#058&003690)
Traces of cultivated emmer wheat have been found among the earliest agricultural remains of many archaeological sites in Europe and Asia. The only place where the wild form of emmer wheat has been found growing is a relatively narrow strip of southwest Asia. Since the oldest remains of cultivated emmer wheat yet found are from village sites in the same narrow strip, it is clear that emmer wheat was first domesticated somewhere in that strip.
Which of the following, if true, most strengthens the argument?
(A) The present-day distribution of another wild wheat, einkorn, which was also domesticated early in the development of agriculture, covers a much larger area of southwest Asia.
(B) Modern experiments show that wild emmer wheat can easily be domesticated so as to yield nearly as well as traditionally domestic strains.
(C) At the time when emmer wheat was first cultivated, it was the most nutritious of all the varieties of grain that were then cultivated.
(D) In the region containing the strip where wild emmer wheat has been found, climatic conditions have changed very little since before the development of agriculture.
(E) It is very difficult, without genetic testing, to differentiate the wild form of emmer wheat from a closely related wild wheat that also grows in southwest Asia.
答案为D
请nn讲讲思路吧~~~
首先我不是NN,因为正好做了这题,我就说说自己的思路.
A,B,C都与这个ARGUMENT没啥关系,都可以忽略不记.
E是因为不好区分野生和家养的物种,所以容易搞错.这个不是STRENGTHEN,是WEAKEN.
所以看D 就顺眼多了.呵呵.
因为天气变化不大,所以很容易家养.勉强算是STRENGTHEN吧.
我也不是NN提供一点参考
D排除气候因素(climatic conditions have changed very little since before the development of agriculture.) 从而支持结论(it is clear that emmer wheat was first domesticated somewhere in that strip)
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