锅炉酸洗结束后，不应用（）将废液排出，因为空气进入会使锅内发生严重腐蚀，而应用（）进行冲洗。
参考答案：放空法，除盐水排挤酸液
You have decided to organize a study group of other project managers in your organization to help prepare for the PMP exam．Everyone is highly motivated to earn the credential because the CEO has decided to pay a $5000 bonus to each person who becomes certified．What type of communication are you employing in your efforts to organize this group
A．Horizonta
B．Vertica
C．Forma
D．Externa
简述关节活动范围练习（ROM）的目的。
