（） are individuals and organizations that are actively involved in the project, or whose interests may be affected as a result of project execution or project completion.

No more having to buy expensive textbooks which you will only use for a year or two and then sell or _______ away. 

— Do you prefer a portable or a clumsy 3D printer?

—                      .

You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

A rectangular area that can contain a document, program, or message.

Graphic representations for a program, type of file, or function .

2. 水利水电工程常见的网络计划技术有关键线路法、计划评审技术和横道图。

某一有源二端线性网络如图7.1-21（a）所示。该网络的戴维南等效电路如图7.1-21（b）所示，其中US和RS取值为（）。

求线性有源二端网络内阻时：
（1）无源网络的等效电阻法，应将电压源（）处理，将电流源（）处理；
（2）外加电源法，应将电压源（）处理，电流源（）处理；
（3）开路电压和短路电流法，应将电压源（）处理，电流源（）处理。