A. Because it has a hook in its mouth Because the big fish dresses fashionably C. Because he likes the big fish D. Because big fish are handsome
A. 白色葡萄球菌 B. 乙型溶血性链球菌 C. 溶血性金黄色葡萄球菌 D. 大肠埃希菌 E. 肺炎链球菌