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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.
我想知道D中那个since说的是气候从“before the development of agriculture”时开始到现在没有怎么大变呢,还是像之前讨论贴里说的是从很久很久以前到农业开始前就没有大变?
如果按照以前的讨论贴里的理解,最早野生到被人们发现并耕种,因为气候的不变因此没有灭绝。
http://forum.chasedream.com/dispbbs.asp?boardid=24&replyid=3481407&id=249484&page=1&skin=0&Star=1
但我认为题目说的是现在发现唯一还在生长野生种的在strip,此地恰好也是最早家养种发现的地方。但如果此地出现的野生种是因为某种原因在人们开始耕作家养种以后才生长起来的,就不能说明此地最早开始耕种。而D至少能说明因为气候的不变,现在的这些野生种至少从before agriculture到现在都活得好好的,代代相传,能加强(虽然不能完全肯定)现在还活着的这些野生种就是以前人们用来驯化的那种。
[此贴子已经被作者于2009/8/17 17:29:20编辑过] |