4立方米电铲缓冲器的作用是对起重臂起到保护作的功能。
参考答案：对
It’s necessary to be prepared for a job interview. the answers ready will be of great help.
A．To have had
B．Having had
C．Have
D．Having
阿奇霉素每次滴注时间不得少于60分钟，滴注液浓度不得高于多少？（）
A.2.0mg/ml
B.3mg/ml
C.4mg/ml
D.5mg/ml
