猪肉绦虫病的传染源是()
A．鼠
B．猪
C．牛
D．患者
E．蚤类
参考答案：D
-Can you go to the concert with us on weekends ?
-__________, but I have to babysit my sister.[ ]
A. No, I can't
B. Sorry, I can't
C. I'd like to
D. Yes, I can
报表汇总一向通过( )。
A．表页汇总B．单元汇总C．区域汇总D．行列汇总
