企业确认收入后，发生销售退回的，一般情况下应冲减退回当月的销售收入和销售成本。( )
参考答案：对
—_______ you swim?
—Yes, but I'm not a good swimmer.[ ]
A. Can
B. May
C. Need
D. Must
舳舻千里 zhú lú qiün lǐ
