A.DocumentRoot B.DirectoryIndex C.Listen D.ServerName
A.yum -y install apache B.yum -y install httpd C.yum -y install http D.yum -y install apachecd
A.select * from wg.user where ID='1103'; B.show * from wg.user where ID='1103'; C.select from wg.user where ID='1103' and *; D.select table wg.user where ID='1103';