下图是在显微镜下观察到的叶片结构请据图回答1写出图中序号所示结构名称2 3 2叶与外界进行气体交换的“窗口 是6 ——青夏 Template




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tomski下图是在显微镜下观察到的叶片结构请据图回答1写出图中序号所示结构名称2 3 2叶与外界进行气体交换的“窗口 coloring