当traceroute程序收到______报文时,表示traceroute程序报文已经到达目的主机。
A. ICMP超时
B. ICMP主机不可达
C. ICMP端口不可达
D. ICMP网络不可达
A big confrontation between the grandmother and The Misfit is over
A. journey
B. Jesus
C. education
D. jail
This is _____ old picture of our classroom
A. a
B. an
C. the
D. /
_____ in the picture is Mr. Li.
A. Man
B. A man
C. The man
D. Men