Since you are trouble, why not ask help? [ ]
A. in, for
B. in, to
C. with, for
答案:A
房产税采用( )的税率。
A.超额累进税率
B.比例税率
C.分类分级的幅度定额税率
D.地区差别税率
隔离开关的常见故障及造成原因是什么?