The driver was at _____ loss when _____word came that he was forbidden to drive for speeding.[ ]

A. a ; the    

B. / ; /    

C. the ; the    

D. a ; /        

TOTAL命令的功能是______。

A．对数据表记录个数进行统计

B．对数据表字段个数进行统计

C．对数据表的内容进行合并

D．对数据表的某些数值型字段按指定关键字进行分类汇总