问题描述：
civilization can not be thought of as()in a short period oftime.选项A having been cr...
civilization can not be thought of as()in a short period oftime.选项A having been created ,B being create 选哪个?为什么?
civilization can not be thought of as()in a short period oftime.选项A having been created ,B being create 选哪个?为什么?
问题解答：
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