岗位HSE巡回检查表中对压力表、安全阀的检查有何要求?
参考答案:要求压力表、安全阀灵活好用有效、无破损、标签清晰。
The old rules have to be _____because they only applied to the circumstances that existed when they were made a hundred years ago.
A.developed
B.established
C.observed
D.revised
在队列研究中,人时数的时间单位最常用的是()。
A.小时
B.日
C.周
D.年
E.月