规定总税负最高限额的税收支出方式属于（）。
A.税收豁免
B.税收扣除
C.优惠税率
D.退税
参考答案：C
—Is this your eraser, Kangkang
—No, it isn't _______. It's _______. [ ]
A. my; your
B. mine: her
C. mine; his
D. my; yours
储能器的基本作用是：当井涌发生时，它能使防喷器迅速、可靠地关闭。
