水利水电施工企业应在设备醒目的位置悬挂（）。
A.标识牌
B.检验合格证
C.安全操作规程
D.检修操作规程
参考答案：A, B, C
At no time does the salesgirl get up late in the morning, for she is always too busy _____ a good rest.
A．to take
B．taking
C．took
D．taken
原棉分类
