如图为显微镜的结构示意图请据图回答1图中控制镜筒升降幅度较大的结构是粗准焦螺旋粗准焦螺旋调节光线强弱主要靠�遮光器遮光器取镜时 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为显微镜的结构示意图请据图回答1图中控制镜筒升降幅度较大的结构是粗准焦螺旋粗准焦螺旋调节光线强弱主要靠�遮光器遮光器取镜时 coloring