以健身为目的的体育锻炼一般以（）的准备活动为宜。
A.5~10分钟
B.10~15分钟
C.15~20分钟
D.20~25分钟
参考答案：B
The WBS, estimates for each work package, and the network diagram are completed. Which of the following would be the NEXT thing for the project manager to do
A) Sequence the activities. B) Verify that they have the correct scope. C) Create a preliminary schedule and get the team's approval. D) Complete risk management.
下列不属于国产非标准设备原价估算方法的是 ______。
A．成本计算估价法
B．比例估算法
C．系列设备插入估价法
D．定额估价法
