如图分别是叶片横切面示意图和叶的下表皮示意图据图回答问题.1填写图中指示线所指各结构的名称�上表皮�叶脉�叶肉�下表皮�保卫细胞�气孔 Template




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tomski如图分别是叶片横切面示意图和叶的下表皮示意图据图回答问题.1填写图中指示线所指各结构的名称�上表皮�叶脉�叶肉�下表皮�保卫细胞�气孔 coloring