PASSIM卷烟机电烙铁与烟条位置关系调整不当，会形成（）或跑条故障。
参考答案：爆口烟
After a long walk, Mary’s legs _____ and she couldn’t run any further.
A．gave out
B．broke out
C．tired out
D．stuck out
( )大二芯插头的顶端总是与信号冷端相连接的。
