溶血性链球菌()葡萄球菌()淋病奈瑟菌()
A.乳酪状脓液
B.黄绿色稠厚脓液
C.稀薄带血性脓液
D.胆汁样脓液
E.白色或金黄色无臭脓液
参考答案:C,E,C
Miss. Gao _______ in the library for three years. But now she is a teacher.
A.worked
B.has worked
C.had worked
D.has been working
在SQL语言中,( )子句能够实现关系参照性规则
A.PRIMARY KEY
B.NOT NULL
C.FORIGN KEY
D.FORIGN KEY...REFERENCES...