题目内容：
从事电焊、气焊作业时，氧气瓶和乙炔瓶与明火作业的距离不小于（ ）m。
A．2 B．5
C．10
D．30
参考答案：
答案解析：
单选题：从事电焊、气焊作业时，氧气瓶和乙炔瓶与明火作业的距离不小于（ ）m。
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- 题目类型：单选题
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B．5
C．10
D．30
B．5
C．10
D．30
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