风对泄漏的天然气有非常明显的输送和稀释作用。
A. 正确
B. 错误
关于输、变电月度检修计划实用化检查指标的描述,正确的是()
A. 检查月度检修计划的完整性、准确性
B. 检查月度检修计划是否及时审批、下发
C. 检查月度检修计划是否与工作票关联
D. 检查月度检修计划是否启动流程
能使列车管得到比原规定充气压力高出0.03Mpa-0.04Mpa的自阀位置是()。
A. 过充位
B. 紧急制动位
C. 运转位
D. 手柄取出位
Although lube oils used in the main lubricating service systems should have a relatively high flash point to avoid ignition, they can create smoke and fire hazards when they ().
A. are exposed to a vacuum
B. come in contact with extremely hot surfaces
C. are reduced in temperature to just above the pour point
D. become extremely agitated or aerated