写出完成下列功能的DOS命令，其中DOS的所有外部命令在C：\DOS目录下。当前盘为C盘，切换到A盘当前目录。
存托凭证的优点表现为（） 市场容量大、筹资能力强。 上市手续简单。 合理避税。 避开直接发行股票、债券的法律要求。 盈利能力强。
耳柱骨来源于（）。
A router that performs Network Address Translation （NAT） is installed between your computer and the Internet. The router fails. You connect the computer directly to the Internet. You need to ensure that the computer is connected to the Internet in the most secure manner possible. What should you do？（） Enable the Remote Desktop feature in the System Properties dialog box.。 Configure the network category of your network connection to Public.。 Configure the network category of your network connection to Private.。 Enable the Windows Collaboration Computer Name Registration Service exception in Microsoft Windows Firewall.。
简述变压器保护的一般运行规定？
Which service component in the wireless operate phase helps isolate and resolve an incident？（）
