UID:38005
UID:49964
UID:60001
UID:45101
UID:59970
UID:20217
UID:59877
UID:61016
UID:60542
UID:29077
引用第55楼wy2yw于2009-03-17 09:05发表的 :8元成本,9元卖掉=1受益10元买回=-1受益11元卖掉=1受益 所以总受益=1