[填空题] 建设项目财务评价包括融资前评价和融资后评价，其中融资前评价以（）分析为主、（）分析为辅。

信息提取 反射标准层的选择。 关于SCA板的描述不正确的有（） ["SCA板不处理监控信息","SCA可以完成OSC信道的接入和解出","没有信号输入时，SCA板会上报告警","SCA可以用在OLA站和OTM站"] Which of the following are benefits of VLANs?（） [" They increase the size of collision domains."," They allow logical grouping of users by function."," They can enhance network security."," They increase the size of broadcast domains while decreasing the number of collision domains."," They increase the number of broadcast domains while decreasing the size of the broadcast domains."," They simplify switch administration."] 客户分析是客户关系管理的首要环节，其关键是分析客户的（） ["终生价值","潜在价值","历史价值","当前价值"] 建设项目财务评价包括融资前评价和融资后评价，其中融资前评价以（）分析为主、（）分析为辅。