题目内容 (请给出正确答案)
提问人:网友c********1 发布时间:2023年8月5日 10:05
[单项选择题]

就一座城市而言,只有绿地与建筑用地比例达到()时,才能呈现生态平衡。

A.1:2

B.1:1

C.2:1

D.3:2

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