对粪便标本增菌培养伤寒沙门菌合适的培养基是( )
A．GN培养液B．亚硒酸盐胱氨酸增菌液C．碱性蛋白胨水D．高渗葡萄糖肉汤E．贝瓦肉汤
参考答案：B
负责企业日常业务与事务的处理、定期提供业务信息的系统是（）.
A.管理信息系统
B.决策支持系统
C.电子数据处理
D.经理信息系统
The reporter said that the UFO _____ east to west when he saw it. [ ]
A. was traveling
B. travelled
C. had been traveling
D. was to travel
