什么3000,4500的，还有那个prehistory是什么意思啊 最后解释里有一句话 later mayan agricultural tools could be copies of the earlier culture's tools 但是题目里写 the implement 's design are strikingly different from the designs of stone implements produced by other cultures known to have inhabited the area in prehistoric times. 这两句是不是矛盾的啊，求指教
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发表于 2011-8-25 11:36:53
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