正向市场是远期月份合约价格大于近期月份合约价格的市场。 ( )
参考答案:对
设数列{an}满足a1=1,an+1=3an,则a5=______.
— May I have some milk?
— Sorry, we have _____ left (剩下). [ ]
A. few
B. a few
C. little
D. a little