电解槽加料时间间隔应和该时间内的()相匹配。
A.工作电压
B.分子比
C.电流效率
D.电解质水平
参考答案:C
—Sorry, I'm late.
—It's OK. However, you________come to the company today, for it is Saturday. [ ]
A. couldn't have
B. needn't have
C. wouldn't
D. couldn't
( )应当对违反工艺规程及操作不当的质量事故承担责任。
A.焊接工程师
B.焊工
C.探伤人员
D.质检人员