限速器安全钳联动试验后,应将电梯以()速度恢复运行状态
A、快车向上
B、检修向下
C、检修向上
D、快车向下
参考答案:C
In order to get good marks, he has changed his attitude ______ study.
A.about
B.of
C.to
D.on
局部通风机无计划停风后,恢复供风前,必须检查开关附近()米范围的瓦斯情况。
A.10
B.20
C.30
D.40