【单选题】
___0449.餐饮场所的厨房的烟道应至少( )清洗一次。
A. 每月
B. 每季度
C. 每半年
D. 每年
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答案
B
解析
暂无解析
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___0483.某企业为方便气焊(割)作业,专门自制了承载氧气和乙炔气体的手推车(见图),哪里焊接就将车子推到哪里,你认为如此法的隐患是( )。
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