网络实用程序ping通常使用网络层的ARP协议来了解对方主机的通信状况。()
A.正确
B.错误
A.单击“开始”-“运行”,然后输入“ cmd”并执行后进入到“命令提示符状态”;
B. 双击“我的电脑”,启动计算机的操作界面;
C. 输入命令“ipconfig www.bnude.com” 并回车,系统会立即执行此命令;
D. 输入命令“ping www.bnude.com”并回车,系统会立即执行此命令。
E. 从其反馈信息中可以获得网站 www.bnude..com对应的IP地址。
You haven' t heard from your friend (Li Ping) since last year. Write a letter according to the following out line: 1 ) greet him and tell him how you spend your vocation and 2) invite him to Beijing. You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Li Ming" instead. You don' t have to write the address. (10 points )
A.presented
B.was presented
C.inspected
D.was inspected