在协议有效期内合作一方提出终止合作关系，属于（）。

A、正常终止

B、非正常终止

C、自然终止

D、非自然终止

A project life cycle is a collection of generally sequential project（）(1) whose name and number are determined by the control needs of the organization or organizations involved in the project. The life cycle provides the basic（） (2) for managing the project, regardless of the specific work involved.

空白（1）处应选择（）

A.phases

B.processes

C.segments

D.pieces