下列关于我国省会城市简称叙述正确的有（）

A、福州的简称是蓉

B、南宁的简称是邕

C、成都的简称是榕

D、贵阳的简称是筑

对集中监控的可靠性有哪些要求。

以下关于工程项目划分，（　）是计算人工、材料、机械消耗的最基本的计算要素

A、单项工程

B、单位工程

C、分部工程

D、分项工程

营改增后，企业税负是否会加重？

our company has a main office and 15 branch offices. The company has a single active directory domain. All servers run windows server 2008.You need to ensure that the VPN connections between the office and the branch offices meet the following requirements:All data must be encrypted by using end-to-end encryption.The vpn connection must use computer-level authentication.User names and passwords cannot be used for authentication.What should do?（）

A、Configure an ipsec connection to use tunnel mode and preshared key authentication.

B、Configure a PPTP connection to use version 2 of the MS-CHAP v2 authentication.

C、Configure a L2TP/IPsec connection to use the EAP-TLS authentication.

D、Configure a L2TP/IPsec connection to use version 2 of the MS-CHAP v2 authentication.

简述股票与债券有哪些不同？