快开奥运会了，哪位知道现在北京的空气质量咋样？
北京现在的空气质量如何？
xingxing1 (2008-08-04 17:18:32) 评论 (0)快开奥运会了，哪位知道现在北京的空气质量咋样？
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北京现在的空气质量如何？
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