志贺菌属根据O抗原分为多个群，其中B群为（）
A.痢疾志贺菌
B.福氏志贺菌
C.鲍氏志贺菌
D.宋内志贺菌
E.痢疾志贺菌8a亚型
参考答案：B
It was not _____ she took off her glasses _____ I realized she was a famous film star.
A．when , that
B．until , that
C．until , that
D．when , then
低温可杀灭物料中的一切微生物。
