小孔型焊接保护气体流量一般在()
A. 5L/min
B. 10Lmin
C. 15L/min
How to address your manager Andrew Louis?
A. Mr. Louis
B. Mr. Andrew
C. Andy
How to address your teacher Jim Green?
A. Mr. Green
B. Jim
C. Teacher Jim
How to address your best friend Jenny Louis?
A. Mrs. Louis
B. Jenny Louis
C. Jenny