下图是某同学在显微镜下观察到的叶横切面据图回答问题 1图中的1 和2 都是由无色透明排列紧密的一层细胞构成的12 Template




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tomski下图是某同学在显微镜下观察到的叶横切面据图回答问题 1图中的1 和2 coloring