（ ）是在启用前就以编有顺序号的若干账页固定装订成册的账簿。
A．总账
B．明细账
C．订本账
D．活页账
参考答案：C
在关系数据库规范化理论的研究中，在函数依赖的范畴内， 【17】 达到了最高的规范化程度。
Specific duties are levied ______ some physical unit such as dollars per bushel, per kilo, or per metre and ad valorem duties are calculated as a percent of the value of the goods.
A．on the basis of
B．with the basis of
C．on the base of
D．with the base of
