所采购的原材料的交货时间宜早不宜迟,因此交货期越早越好。( )
参考答案:错
—Can you imagine that we've translated 30% of the long article today?
—_______. You're so smart and quick! [ ]
A. It's a pleasure
B. I don't mind
C. That's it
D. I can't believe it
减小薄板焊接波浪变形的措施包括()。
A.反变形
B.刚性固定
C.预热
D.增加焊接线能量