所有被认可的变更应在()中体现。

如果项目A的净现值为30000美元，项目B的为50000美元，那么选取B的机会成本是多少？（）

One of your team members informs you that he does not know which of the many projects he is working on is the most important . Who should determine the priorities among projects in a company？

项目的基线发生变更应该经过()授权执行的。

产生，收集和分发信息以正式结束项目，这个叫做：（）