Mr. Zhang gave all textbooks to all the pupils, except___________ who had already taken tem.

A．these

B．those

C．the ones

D．the others

关于脑膜炎奈瑟菌的生物学性状，叙述错误的是

A.革兰阴性，成双排列

B.营养要求高，常用巧克力培养基培养

C.对环境因素抵抗力较强

D.产生自溶酶

E.初资分离时在5%～10%CO条件下生长良好