单项选择题
A.255.255.255.192 B.255.255.255.224 C.255.255.255.240 D.255.255.255.248
A.%SysemDrive%/wwwroot B.%SysemDrive%/ C.%SysemDrive%/wwwroot/inetpub D.%SysemDrive%/inetpub/wwwroot
A.有 B.没有 C.有时有 D.在一定环境中有