以下哪个选项描述的参数可以唯一确定一条TCP 连接? E
A. 源端口号,源IP 地址
B. 目的端口号,目的IP 地址
C. 源端口号,目的端口号
D. 源MAC 地址,目的MAC 地址
E. 以上都不对
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-- I've never been to Disneyland, Judy.-- _________.
A. So have I
B. Neither am I
C. Neither have I
D. So am I
Only when Lily walked into the office _______ that she had left the contract at home.
A. she realized
B. has she realized
C. she has realized
D. did she realized
A good dictionary is our best teacher. Not only _______ the meaning of words, but also teaches us how to use them.
A. does it give
B. it teaches
C. does it teach
D. it gives
_______ when she started complaining.
A. Hardly had he arrived
B. Not until he arrived
C. No sooner had he arrived
D. Scarecely did he arrive