药品批发和零售连锁企业应制定的质量管理方面的制度有
A．20项
B．17项
C．15项
D．13项
E．10项
参考答案：C
You____________ television. Why not do something more active?
A．always watch
B．are always watching
C．have always watched
D．have always been watching
对配电变压器绕组绝缘筒的尺寸有何要求？
