4.右图是人体消化系统的部分结构示意图图�所指的器官其功能主要是 A.初步消化蛋白质 B.形成粪便 C.消化和吸收的主要场所 D.分泌胆汁 Template




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tomski4.右图是人体消化系统的部分结构示意图图�所指的器官其功能主要是 a.初步消化蛋白质 b.形成粪便 coloring