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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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