城市给水管网需要保证最小的服务水头，则四层的办公楼最小服务水头为______m。
A．16 B．12 C．20 D．10
参考答案：C
When we were young, we were often ______by Grandma to pay attention to our table manners.[ ]
A. permitted
B. reminded
C. awarded
D. spotted
杭州神州行某子套餐用户A漫游到金华，其套餐主叫漫游通话费为0.5元/分钟，被叫漫游费0.28元/分钟。拨打13800579505，请问A如何收费？（）
A.0.5元/分钟
B.0.59元/分钟
C.0.8元/分钟
D.免费
