[单项选择]—We didnt find John at the meeting. —He()about there being a lecture the following day. A. didn't tell B. had not told C. told D. had not been told
第3题:[单选题] Which command can be a router to verify the layer 3. path to a host? A. traceroute address B. tracert address C. ssh address D. telnet address 参考答案:A