A.相加 B.相減 C.相乘 D.相除
A.紅線 B.A1 C.A2 D.B
A.原票即行失效 B.產(chǎn)生應(yīng)補收時應(yīng)補收,不收退票費 C.產(chǎn)生應(yīng)補區(qū)間票價差額不補收,核收退票費 D.產(chǎn)生應(yīng)補區(qū)間票價差額應(yīng)補收,不收退票費