如图为叶片横切面结构图请据图回答问题1具有保护作用的结构是由a上表皮和f下表皮组成的含叶绿体最多的结构是b栅栏组织2 Template




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tomski如图为叶片横切面结构图请据图回答问题1具有保护作用的结构是由a上表皮和f下表皮组成的含叶绿体最多的结构是b栅栏组织2 coloring