为了保障总会计师的职权,<总会计师条例>规定,凡设置总会计师的单位就不能再设置与总会计师职责重叠的副职。( )
参考答案:对
— ______ does his sister water the flowers?
— Once a day. [ ]
A. How many
B. How long
C. How soon
D. How often
乒乓球双打站位有一前一后,一左一右两种。