The main causes of fire on board ships are _____.
A. oil leakage in engine-room
B. hot work (welding, cutting, etc.)
C. static electricity
D. All of the above
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伤员上肢或小腿出血,且没有骨折和关节损伤时,可采用屈肢加垫止血法止血。()
发生危险化学品火灾时,灭火人员不应个人单独灭火。()
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