1. [单选题]Purser presents all the seaman’s books to the ________
A. Pilot
B. Customs Officer
C. Immigration Officer
D. Agent
2. [单选题]固定式高倍泡沫灭火系统泡沫膨胀率应不超过_______。
A. 1000:1
B. 100:1
C. 10:1
D. 12:1
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