如图为叶片横切面的结构示意图请据图回答下列问题.1结构�中是上表皮其特点是细胞排列紧密2叶片�现绿色是因为图中标号�所示结构的 Template




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tomski如图为叶片横切面的结构示意图请据图回答下列问题.1结构�中是上表皮其特点是细胞排列紧密2叶片�现绿色是因为图中标号�所示结构的 coloring