下列各项中，能够同时影响保本点、保利点及保净利点的因素为（）。 ["单位边际贡献","贡献边际率","固定成本总额","目标利润","所得税率"]
在数字签名方案中，不仅可以实现消息的不可否认型，而且还能实现消息的（）、（）。
下列不属于研究开发业务流程中所包括的主要活动的是（）。 ["立项和预算管理","设备、材料管理","委托外部研究开发","财务管理"]
What are two characteristics of the relationship between the Cisco PIN architecture and Cisco Validated Designs? （）(Choose two.) [" Cisco is focusing on Cisco Validated Designs as a means to driving integrated networks."," Cisco is focusing on the PIN architecture as a means to driving integrated networks."," The Cisco PIN architecture is a critical mechanism for supporting integrated markets because it can be implemented quickly."," The Cisco Validated Designs program provides critical mechanisms for supporting integrated markets because the mechanisms can be implemented quickly."," Cisco Validated Designs can be implemented quickly without customer input."]
简述学习方剂配方原理及结构。
遥测装置应不受传输（）、传输状态、电源和电路（）的影响。
