为了测定某黄铜样品的组成某化学兴趣小组的同学进行了以下实验取四份相同质量的样品分别放入等质量的烧杯中然后分别加入稀硫酸充分反应后用天平 Template




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anonymous
anonymous
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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sketch #5223 Elsa from Frozen by Ben De Jesus

tomski为了测定某黄铜样品的组成某化学兴趣小组的同学进行了以下实验取四份相同质量的样品分别放入等质量的烧杯中然后分别加入稀硫酸充分反应后用天平 coloring