焊接场地应保持必要的通道，车辆通道宽度应不小于2m。( )_爱下问搜题

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问题判断题

焊接场地应保持必要的通道，车辆通道宽度应不小于2m。( )

答案

参考答案：错

选择题

Some great people said that it was their primary school teachers and their lessons ______ they were fond of ______ influenced their whole lives.

A. which; that
B. that; which
C. which; which
D. that; that

填空题

TIG焊时，接触引弧不仅容易使钨极烧损严重，还常常在焊缝中引（）缺陷。