信息系统安全技术中，关于信息认证、加密、数字签名的描述，正确的是()。

The process of translating the qualitymangement plan into executable quality activities that incorporate theorganization's quality policies into the project.

Includes the processes required to ensure that the project includes all the work required , and only the work required , to compete the project successfully . managing the project scope is primarily concerned with defining and controlling what is not included in the project.

Estimate activity durations is the processof estimating the number of work periods to complete indivities with estimatedresources . the tools and technques is not including（）.

Is the technology that appears to emulate human performancetypicaliy by learning,coming to its own conclusions, appearing to understandcomplex content, engaging in natural dialogs with people, enhancing humancognittive performance (also known as cognittive computing) or replacing peopleon execution ofnonroutine tasks().

Is a decentralized, distributed and public digital ledger that is used to record transactions across many computers so that the record cannot be alterred retroactively without the alteration of all subsequent blocks and the collusion ?of the network().

某拟建项目财务净现金流量如下表所示，该项目的静态投资回收期是()年。

某项目由并行的3个活动甲、乙和丙组成，为活动甲分配3人5天可以完成，活动乙分配6人7天可以完成，活动丙分配4人2天可以完成，活动完成后人员可再调配。在此情况下，项目最短工期为()天。

某项目由并行的3个活动甲、乙和丙组成，为活动甲分配3人5天可以完成，活动乙分配6人7天可以完成，活动丙分配4人2天可以完成，活动完成后人员可再调配。在此情况下，此时人员最少配置为()。

质量管理实施阶段的工具与技术不包括()。

某项工程的活动明细如下表(时间：周：费用：万元)：项目总预算由原先的60万元增加到63万元，根据上表，所需项目总费用为()万元。