What additional precautions should be taken when making temporary repairs to a ship that is operating when hydrogen sulfide is present?（）<br>A:Seal off all tank and compartment ventilation<br>B:Remove all bulk materials from the P-tanks<br>C:Provide respiratory protection and monitoring<br>D:All of the above

What additional precautions should be taken when making temporary repairs to a ship that is operating when hydrogen sulfide is present?（）
A:Seal off all tank and compartment ventilation
B:Remove all bulk materials from the P-tanks
C:Provide respiratory protection and monitoring
D:All of the above

出自：海船船员证

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