�年来�国部分地区多次陷入严重雾霾之中其中一个重要原因是含碳化石 燃料的过度使用.如图为生态系统碳循环示意图图中abb1 B3c Template


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tomski�年来�国部分地区多次陷入严重雾霾之中其中一个重要原因是含碳化石 燃料的过度使用.如图为生态系统碳循环示意图图中abb1 b3c coloring