机车长期备用指备用（）以上的机车。
A.半个月
B.一个月
C.十天
D.五天
参考答案：B
Jack has been working hard these days.It's obvious that there is ________he is eager for but didn't mention to us.
A．anything
B．something
C．nothing
D．everything
反映公司偿债能力的指标有（）。
A.流动比率
B.速动比率
C.利息支付倍数
D.应收账款周转率和周转天数
E.股东权益比率
