焊接接头弯折角度不得大于4°，接头轴线便宜不得大于0.1D、，并不得大于（）。
A、2mm
B、3mm
C、4mm
参考答案：A
His family members gave some examples of_____ his drinking and smoking had affected the family.
A．that
B．why
C．how
D．what
反应油箱内部故障的继电器为（）的（）和（）两种保护。
