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

在给定的显著性水平下，进行假设检验，确定拒绝域的依据是（）。

A.原假设为真的条件下检验统计量的概率分布

B.备择假设为真的条件下检验统计量的概率分布

C.原假设为真的条件下总体参数的概率分布

D.备择假设为真的条件下总体参数的概率分布