对抗腐蚀性能要求高的双面焊焊缝,与腐蚀介质接触的焊层应( )施焊。
A.最后
B.最先
C.不进行
D.与另一层同时
参考答案:A
— Are you free tomorrow afternoon?
— I'm afraid not. I'll have to _____ an important lecture given by a famous professor. [ ]
A. join
B. take part in
C. enter
D. attend
船舶在海上遇到大风浪,发现偏顶浪航行不利,虽然采取过措施,仍然不能免除危险的出现时,应果断采取()措施。
A.滞航
B.顺浪航行
C.漂滞
D.迎浪减速