焊接工艺评定时,板状对接接头的焊接工艺评定不适用于管状对接接头。
A. 正确
B. 错误
焊接工艺评定中补加因素是指影响焊接接头冲击韧性的焊接工艺因素。
A. 正确
B. 错误
焊接工艺评定中次要因素是指要求测定的力学性能和弯曲性能无明显影响的焊接工艺评定因素。
A. 正确
B. 错误
What happened when the man was 13 years old?
A. His family moved to Sacramento to settle down.
B. His family bought him a new suit and a new tie.
C. He went to Sacramento for a spelling competition.
D. He won the first prize in the state spelling competition.
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