基差的绝对值始终大于持仓费，就会出现无风险的套利机会。
参考答案：对
完成句子
小题1:我的电脑出毛病了，需要修理一下。
Something has __________________________________ my computer, it needs repairing.
小题2:玩太多的电脑游戏对青少年有不好的影响。
Playing too many computer games ___________________________________ teenagers.
小题3:众所周知， 勤奋工作导致了他的成功。
It is known to all that _____________________________________ his success.
小题4:医生说他正与疾病做顽强斗争。
The doctor said he ________________________________________ the disease.
小题5:当我到达电影院时，电影已经开始一刻钟了。
When I got to the cinema, the film __________________________________________________.
小题6:他的房间太乱，没有人想进出。
His room is _____________________________________ that nobody wants to enter it.
阑门是指
A．胆与胃相接处
B．胃与小肠相接处
C．小肠与大肠相接处
D．胃与食道相接处
E．大肠与肛门相接处
