影响焊接接头弯曲角度的因素有哪些?
参考答案:
影响焊接接头弯曲角度的因素有:
材料的塑性;
焊接工艺;
弯轴直径和板厚。
精神分析法的人性观属于( )
A.积极人性观
B.被动人性观
C.消极人性观
D.主动人性观
In second language acquisition, the process of adapting to the new culture of the L2 community is called a .