如图是人体内的气体交换过程示意图据图回答.1人体内的气体交换包括a和b两个过程.2图中�表示氧气的扩散过程�表示二氧化碳的 Template




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sketch #3260 sorry to over comment on your blog .haha. I 'm just flnpiipg through your posts after finding you through the KCWC. Recently I had this huge urge to learn to sketch with black ink pens. This cloud drawing is exactly the thing that I feel the need to put on paper. : )


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tomski如图是人体内的气体交换过程示意图据图回答.1人体内的气体交换包括a和b两个过程.2图中�表示氧气的扩散过程�表示二氧化碳的 coloring