《齐客旅客列车应急处置预案》中，现场应急处置组组长为（）。
A. 车队长
B. 乘警长
C. 段长
D. 列车长
查看答案
列尾装置更新改造由（）根据各种设备的技术要求和生产需要确定后报路局纳入年度计划核定。
A. 管理单位
B. 使用单位
C. 维修单位
D. 中间站（车间）
胎重的增长在妊娠期的各个阶段是不一致的，胎重的（）是在母畜怀孕最后（）时期内增长的。
查阅不良资产处臵档案的有关公文、介绍信等要粘贴在原件后保管，并将查阅日期和有关情况在卷宗末页备考表中作详细记录。
A. 正确
B. 错误
In a refrigeration system, which of the following statements describes the actions occurring when a solenoid valves, used in conjunction with an unloader head is energized?（）
A. The solenoid valves directs high pressure gas to the valve lifting device raising the suction valve off its seat and causing one specific cylinder to become unloaded
B. The solenoid valves directs high pressure gas to the underside of the unloading piston, causing it to rise and allowing the recirculating ports to be opened
C. When the solenoid valve becomes energized, the valve ports become closed, allowing discharge pressure to build up above the piston, shifting it and causing it to unload
D. The solenoid valve allows the refrigerant to pass from the suction chamber to the top of the unloader piston, causing the piston to lift and unload the cylinder
微信支付 
支付宝支付