Be careful when you touch printed circuit boards.
A.Be careful when you put your hand onto printed circuit boards. B.Be careful when you get close to printed circuit boards. C.Be careful when you remove printed circuit boards.正确答案A
Be careful when you touch printed circuit boards.
A.Be careful when you put your hand onto printed circuit boards. B.Be careful when you get close to printed circuit boards. C.Be careful when you remove printed circuit boards.正确答案A