荧光探伤、着色探伤和射线探伤是用来检测焊接接头内部缺陷的。( )
参考答案:对
—_________ are you going to have your birthday party?
—You know,my birthday is on June 23.On that day, of course. [ ]
A. When
B. Where
C. Who
D. How
在冲压设备中,离合器的作用是为了(),让滑块()。