【单选题】焊缝不在结构的中性轴上,焊后易产生( )变形?
【单选题】Tina is a shy girl, and it is______ for her to say hello to strangers.
【单选题】焊缝不在结构的中性轴上,焊后易产生( )变形。
【单选题】--- Is Tina a shy girl? --- Yes, she is always afraid of ______ in front of her classmates.
【单选题】焊缝不在结构的中性轴上.焊后易产生 ( ) 变形。