39
D
If you thought the answer was B, reread it. It says, "schedule." There is no way to know if the schedule was bad. 答案可能是 偏差。不过，它不在选项中。D是最佳答案。沉没成本是指由于过去的决策已经发生了的，而不能由现在或将来的任何决策改变的成本。

43 B The items listed might lead to changes, but they are not changes themselves, so choice A cannot be best. These items may be considered when creating a WBS, but they are not components of a WBS (choice C). A market demand (choice D) would not be a logical reason to outsource. As choice B lists good justifications for projects to be initiated, it is the best answer.显然，这些都是启动项目的原因。你能记得启动项目有哪些原因吗？见PMBOK75页

10 A 让最终用户尽早参与到项目中以明确需求才是最佳的选择.B尽早确定目标虽然可行，但是并没有提到让雇员参与，这样确定的目标可能会导致很多问题，例如变更，修改。

9 A The higher the benefit cost ratio, the better.选择成本收益率最高的。注意，中文翻译的是成本收益率，貌似成本除以收益，其实，英文是benefit cost ratio，即收益成本率，收益除以成本，因此，越大越好

9 A The higher the benefit cost ratio, the better.选择成本收益率最高的。注意，中文翻译的是成本收益率，貌似成本除以收益，其实，英文是benefit cost ratio，即收益成本率，收益除以成本，因此，越大越好