“宰相”的“宰”最早指：
A.高级官吏
B.官吏统称
C.低级官吏
D.皇帝
参考答案：B
I _________ my pet dog Huan Huan. But I can't _________ it. [ ]
A. look for; finding
B. am finding; look for
C. am looking for; find
D. find; look for
若期货合约成交后，正向市场上现货价格和期货价格同时上升，并一直持续到交割月份，基差的绝对值始终远大于持仓费，则存在套利机会。( )
