[名词解释] 卵睾

下列哪种物质可防治癞皮病() ["A．尼克酰胺","B．视黄醇","C．生物素","D．钴胺素","E．叶酸"] 会阴区 胃幽门部粘膜病变可导致哪种维生素缺乏() ["A．维生素E","B．维生素B6","C．维生素B12","D．维生素C","E．维生素K"] 阴阜 阴道闭锁 卵睾