某同学用显微镜观察洋�鳞片叶表皮细胞时�现视野偏暗.下列三项措施中能起到增加视野亮度作用的是 �增大光圈 �减小光圈 �换用倍数较大的 Template




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tomski某同学用显微镜观察洋�鳞片叶表皮细胞时�现视野偏暗.下列三项措施中能起到增加视野亮度作用的是 �增大光圈 �减小光圈 coloring