当圆柱面的轴线为投影面垂直线时，作圆柱面上点的投影应运用圆柱面某一投影具有积聚性这一特性作图。
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如何修改和添加网口(eno33554960)文件?( )
A. vi /etc/sysconfig/network-scripts/ifcfg-eno33554960
B. cd /etc/sysconfig/network-scripts/ifcfg-eno33554960
C. vi /etc/systemctl/network-scripts/ifcfg-eno33554960
D. cd /etc/systemctl/network-scripts/ifcfg-eno33554960
以下哪个命令可以实现配置主机名?( )
A. hostnamectl hostname controller
B. hostname set-hostname controller
C. hostnamectl set-hostname controller
D. set-hostname controller
以下哪个命令可以查看网卡信息?( )
A. ip message
B. ip a
C. systemctl ip a
D. systemctl message
以下哪个命令能够完成虚拟机挂载CentOS-7-x86_64-DVD-1511.iso文件?( )
A. mount -o loop CentOS-7-x86_64-DVD-1511.iso /mnt/
B. umount /mnt/
C. mkdir /opt/centos
D. mount -o loop /dev/cdrom /mnt/
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