“三级”安全教育是指厂级.车间级和班组级。
参考答案:对
—I hope that you can remove the difference between you and Susan and become good friends.
— . If only Susan had the same idea. [ ]
A. My pleasure
B. It's a pleasure
C. By no means
D. By all means
简述腹腔穿刺术的目的。