案例在教学中呈现的方法主要有（）。
A、文字描述法
B、录音录像展示法
C、真实情景表演法
D、实验法
参考答案：A, B, C
All of following should be done by the project manager during project control EXCEPT ______.
A) determine that a change has occurredB) ensure that a change is agreedC) make sure all changes are approved by managementD) manage changes as they occur
如何防止热力设备的氧腐蚀？
