国民经济的影子价格，又称为最优计划价格，是指当社会经济处于某种最优状态时，能够反映社会劳动的消耗、资源稀缺程度和市场供求状况的价格。它用于商品交换、预测、计划和项目国民经济效益分析等目的。
水轮机转轮为什么会产生裂纹？反击型水轮机转轮在哪些部位易发生裂纹？
Your company has a server named Server1 that runs Windows Server 2008. Server1 runs the DHCP server role and the DNS server role. You also have a server named ServerCore that runs a ServerCore installation of Windows Server 2008. All computers are configured to use only Server1 for DNS resolution. The IP address of Server1 is 192.168.0.1. The network interface on all the computers is named LAN. Server1 is temporarily office. A new DNS server named Server2 has been configured to use the IP address 192.168.0.254. You need to configure ServerCore to use Server2 as the preferred DNS server. What should you do？（） [" Run the netsh interface ipv4 add dnsserver "LAN" static 192.168.0.254 index=1 command"," Run the netsh interface ipv4 set dnsserver "LAN" static 192.168.0.254 192.168.0.1 both command"," Run the netsh interfface ipv4 set dnsserver "LAN" static 192.168.0.254 primary command and the netsh interface ipv4 set dnsserver "LAN" static 192.168.0.1 both command."," Run the netsh interface ipv4 set dnsserver "LAN" static 192.168.0.254 primary command and the netsh interface ipv4 add dnsserver "LAN" static 192.168.0.1 index=1 command"]
以下关于TCP 协议描述正确的是（）。 ["比UDP具有更高的传输效率","它是一种简单的、面向数据报的传输层协议","主要用在不要求数据发送确认或者只传输少量数据的场合中","一种可靠的传输方式"]
逻辑推演与历史发展相统一有哪些表现形式？
了却君王天下事，（）。作者辛弃疾
