废水气提塔操作压力高,可采取哪些处理措施?
参考答案:
①确认火炬管线阻力;
②确认相关单元是否有气体串入;
③调整气提蒸汽流量;
④确认塔顶压力调节阀动作是否准确灵敏。
The professor ________at 8 o’clock,but he has not shown up yet,which worries all of us.
A.was supposed to arrive
B.must have arrived
C.might have arrived
D.was supposed arriving
为了写一篇历史小论文,小李正在查找“查理一世、克伦威尔、《权利法案》”等方面的资料。由此判断他要写的论文主题应是
A.英国资产阶级革命
B.美国独立战争
C.法国大革命
D.新航路的开辟