修改了/etc/profile文件，如何生效（）。 A: source/etc/profile B: /etc/profile C: 重启机器 D: /opt/profile

分屏查看文件profile的内容,且可上下翻页显示内容的执行命令是()。 A: #less profile B: #profile less C: #more profile D: #profile more

Which two statements are true about traffic shaping and traffic policing？（） A: both traffic shaping and traffic policing cause retransmissions of connection-oriented protocols such as TCP B: both traffic shaping and traffic policing support the marking and re-marking of traffic C: the effects of traffic shaping and traffic policing when configured on a router are applied to outgoing traffic D: traffic shaping queues excess traffic whereas traffic policing discards excess traffic E: traffic shaping allows the traffic to exceed the bit rate whereas traffic policing prevents the traffic from exceeding the bit rate

In a profile control of a curved surface, the profile must be dimensioned with :

安装完java环境，要在配置文件（）中配置java的相关环境变量。 A: /etc/profile B: /root/profile C: /home/profile D: /profile

Solaris操作系统下，（）命令可以修改/n2kuser/.profile文件的属性为：所有用户可读、可写、可执行 A: chmod777/n2kuser/.profile B: chmod000/n2kuser/.profile C: chmod111/n2kuser/.profile D: chmod222/n2kuser/.profile

The following are not road traffic signals ( ). A: traffic light B: traffic sign C: traffic information board D: traffic police command

If you delete a profile, all of the settings and accounts associated with the profile are not changed.

Children should be taught to read __________ A: traffic signs B: traffic island C: traffic jam D: traffic police

A traffic conflict is equivalent to a traffic accident.( )