对于已有冠心病及心肌梗死病史者还应预防再次梗死及其他心血管事件，称为（）
A.二级预防
B.五级预防
C.四级预防
D.一级预防
E.三级预防
参考答案：A
You are beginning a new project that has been attempted，but unsuccessful，several times in the past few years．Previous projects were cancelled because of “politics”(differing views and direction by key stakeholders of the project)．This is an example of______．
A．stakeholder analysis
B．project charter
C．historical information
D．risk identification
湿球纱布必须经常保持清洁、（）和（），一般（）应换1次。
