焊接延迟裂纹是一种()。
A.焊接冷裂纹
B.焊接热裂纹
C.再热裂纹
D.层间断裂
参考答案:A
—Do you still remember the first time you _______with a girl?
—Not exactly, but I remember it was a Sunday.
A.talked
B.had talked
C.have talked
D.were talking
进行高处作业前,应逐级进行安全技术教育及交底,落实所有(),未经落实时不得进行施工。
A.安全思想教育
B.安全技术
C.技术交底
D.安全技术措施
E.人身防护用品