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【单选题】
第二分馏、开工中气密合格后，用氮气充压要求（）。
A.
0.0098-0.049MPa
B.
0.049-0.098MPa
C.
0.098-0.147MPa
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】第二篇 Sleep We all know that the normal human daily cycle of activity is of some 7 - 8 hours’ sleep alternating with some 16 - 17 hours’ wakefulness and that, broadly speaking, the sleep n...
A.
people hate the inconvenience of working on night shifts.
B.
your life is disturbed by changing from day to night routines and back.
C.
not all industries work at the same hours.
D.
it is difficult to find a corps of good night workers.
【多选题】停工反应切断进料后，分馏应（）。
A.
停止原料进分馏塔
B.
用冷回流控制分馏塔顶温度，粗汽油改不合格
C.
停出轻柴油，控制好封油罐液位
D.
控制分馏塔底温度不要太低，排油浆控制分馏塔底液面