什么是品种特异性？
Your company named Contoso， Ltd. has a Web server named WEB1. The Web server runs Windows Server 2008. The fully qualified domain name of WEB1 is web1.contoso.com. The public DNS server has an alias record named owa.contoso.com that maps to web1.contoso.com. Users access WEB1 from the Internet by using http：//owa.contoso.com. The new company security policy states that the owa.contoso.com site must be available for Internet users only through secure HTTP （HTTPS） protocol. The security policy also states that users must not get security warnings when they connect to the site. You need to request a certificate from a public certification authority （CA）. Which Common Name should you use？（） ["Contoso， Ltd.","owa.contoso.com","WEB1","web1.contoso.com"]
简述税负转嫁的特征。
泛珠三角区域包括广东、广西、海南和（）等9个省区和香港、澳门两个特别行政区，简称‘9+2’。 ["安徽","重庆","贵州","湖北"]
焊接裂纹
（叶燮的）才胆识力说
