扫描二维码，直接登录
题库 / Prep2007E1-CR-21
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?
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.
Modern experiments show that wild emmer wheat can easily be domesticated so as to yield nearly as well as traditionally domestic strains.
At the time when emmer wheat was first cultivated, it was the most nutritious of all the varieties of grain that were then cultivated.
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.
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.
前提：1.唯一被发现现在种植有野生小麦的地方在这里
2.目前已经发现的最古老的人工种植小麦也在这里（虽然可能在其他地方才是最古老的，只是没发现，但是不妨碍答案提供第一次在这里被驯养的条件 可能性）
结论：小麦是在这里第一次被驯养的
1.注意，前提1中说的是has been found growing现在时，前提2和结论都是过去发生的事，
存在时间差，现在这里有野生小麦≠过去这里也有野生小麦
2.第一次被驯养：指过去某个时间，野生→人工种植
3.思路：提供条件或可能性，过去这里有野生小麦，才可能在这里第一次被驯养→过去有
D 削弱取反 气候变化，过去不太可能有野生小麦
弱加强，提供条件和可能性，气候不变，这里一直有野生小麦
登录 或 注册 后可以参加讨论