compound duties

compound duties
【正确答案】：COMPOUND DUTIES IS A COMBINATION OF SPECIFIC DUTY AND AD VALOREM DUTY.
【题目解析】：该表达选自L6。Compound duty 实为两个税的结合体，即混合税。所以需要同时理解并记忆另外两个表达：specific duty（从量税），ad valorem duty（从价税）