不是由主动脉瓣病变引起主动脉瓣关闭不全的疾病是()
A.感染性心内膜炎
B.风湿性心脏病
C.先天性二叶主动脉瓣
D.梅毒性主动脉炎
E.主动脉瓣黏液样变性
参考答案:D
All of followings should be done by the project manager during project control except ()
A.determine that a change has occurred
B.ensure that a change is agreed
C.make sure all changes are approved by management
D.manage changes as they occur
团体社会工作的三大模式一般指的是什么?