债权人更关注企业的( )。
A．偿债能力
B．资产管理能力
C．盈利能力
D．筹资能力
参考答案：A
巴固GPAL型（正压）双气瓶空气呼吸器的使用时间（呼吸量按30L/min计）一般为（）。
A.90min
B.80min
C.70min
D.60min
Some experts have said that ________ children believe they can succeed, they will never become totally confident of themselves.
A．if
B．since
C．once
D．unless
