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单选题
Warning: Before you close the hatch, make sure that no persons are in the crew rest compartment. When the hatch is closed, there is no airflow to the compartment and there is a risk of suffocation.
A
警告：关闭舱口前，确保机组休息室中没有人员。舱口关闭时，舱室没有气流，存在中毒的风险。
B
警告：关闭舱门前，确保机组休息室中没有人员。舱口关闭时，舱室没有气流，存在窒息的风险。
C
警告：关闭门栓前，确保机组休息室中没有人员。舱口关闭时，舱室没有气流，存在缺氧的风险。
答案解析
正确答案：B
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