使用加氢干气作制氢原料，会大大降低装置的生产效率，如果加氢干气先经过膜分离处理，把大部分氢气分离出去，装置的生产才能达到正常的负荷水平。
查看答案
Traditionally，the signal for fire aboard ship is（）.
A. more than 6 short blasts and 1 long blast on the whistle，and the same signal on the general alarm
B. continuous sounding of the ship's whistle and the general alarm for at least 10 seconds
C. 1 short blast on the whistle
D. alternating short and long blasts on the ship's whistle
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