如图是显微镜结构图根据此图回答1用来调节光线强弱的结构是 和 .2转动时镜筒升降幅度很小的结构是 .3接� 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如图是显微镜结构图根据此图回答1用来调节光线强弱的结构是 和 .2转动时镜筒升降幅度很小的结构是 coloring