被迫的服从也叫顺从。( )
参考答案:对
( )不是产生焊接烧穿的原因。
A.焊接电流大
B.焊接速度慢
C.钝边过薄
D.坡口间隙小
请根据下面提示,写一篇短文,词数不少于50。 In your spoken English class, your teacher shows you the following picture. You are asked to describe the picture and explain how you understand it.