鳄鱼是一种古老的爬行动物,在进化史上处于重要的地位。日本科学家Kiyoshi Nagai发现,鳄鱼血红蛋白的氨基酸链有着非常奇特的球形......

Objective: To take advantage of Epi Info to manage and analyze disease data. Methods: After selecting the living example......