[单选题]PDM includes four types of dependencies or precedence relationships:（）.The completion ofthe successor activity depends upon the initiation of the predecessor activity.

正确答案 ：D

Start-to-Finish

解析：该题的关键词为"PDM includes four types"，其语句结构为"The completion of the successor activity（主语）depends upon（谓语）the initiation of the predecessor activity"，含义为"后续活动的完成依赖于前置活动的开始"，根据选项容易识别为SF活动依赖类型。

[单选题](1) is a method of constructing a project schedule network diagram that uses boxes or rectangles, referred to as nodes, to represent activities and connects them with arrows that show the dependencies.This method includes following types of dependencies or precedence relationships: (2) the initiation of the successor activity, depends upon the completion ofthe predecessor activity.(3) the initiation ofthe successor activity, depends upon the initiation ofthe predecessor activity.

正确答案 ：

解析：阅读试题并结合选项中的术语简称分析，首先定位该试题考察的知识点集中于项目网络图方面的知识，要求考生识别不同的网络类型以及依赖关系的类型；(1)题的主要语句结构为"__(1)__（主语）1S（谓语）amethod"，即要求考生辨识不同的网络类型，再结合关键词和关键词组"boxesorrectangles和torepresentactivities"，可知用方框表示活动的做法是前导图的特征；最后再四个选项中发现只有PDM为前导图的简称，其他都不是。CPM的全称为CriticalPathMethod（关键路径法），PERT的全称为ProgramEvaluationandReviewTechnique（计划评审技术），AOA的全称为ActivityOnArrow（箭头法）。(2)题和(3)题的主要语句结构都属于名词解释，根据(2)题的关键词"initiationofthesuccessor和completionofthepredecessor"，可知该依赖关系为F-S;(3)题采用相似的分析方法，其依赖关系应该为S-S。

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