预算编制的原则包括（）。 A.综合预算原则 。 B.保障重点原则 。 C.科学决策原则 。 D.绩效管理原则。
Company.com has employed you as their Exchange administrator.The Company.com network contains an Exchange Server 2010 Organization.You are responsible for managing the Company.com network.You receive an instruction from management to reject e-mail messages that have a spam confidence level （SCL） of 5.You thus decide to configure the organization to accomplish this task. What should you do？（） You should consider configuring the sender reputation.。 You should consider configuring the sender filtering.。 You should consider configuring the content filtering.。 You should consider configuring the recipient filtering.。
（）通常是一个逐步的过程，由森林到灌丛到草丛逐渐退化形成，是生态系统退化演替的产物。
While trying to diagnose a routing problem in the network, you issue RIP debugging as displayed below: RtrA#debug ip rip Rip protocol debugging is on RtrA# 1d05h: RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (172.16.1.1) 1d05h: RIP: build update entries 1d05h: network 10.0.0.0 metric 1 1d05h: network 192.168.1.0 metric 2 1d05h: RIP: sending v1 update to 255.255.255.255 via Serial0/0 (10.0.8.1) 1d05h: RIP: build update entries 1d05h: network 172.16.0.0 metric 1 RtrA# 1d05h: RIP: received v1 update from 10.0.15.2 on Serial0/0 1d05h: 192.168.1.0 in 1 hops 1d05h: 192.168.0 in 16 hops (inaccessible) Based on the output of the above exhibit, which two of the following statements are true?（） A ping to 10.0.15.2 will be successful.。 RtrA has three interfaces that will take part in the RIP process.。 There are at least two routers participating in the RIP process.。 A ping to 192.168.168.2 will be successful.。
简述边缘效应产生的原因及时间意义。
根据《建筑安装工程费用项目组成》（建标[2003]206号），下列建筑安装工程费用项目中，不属于直接工程费的是（）。
