问题
多项选择题
IEEE802标准将局域网层次模型分为（）。
A.物理层
B.网络层
C.逻辑链路控制子层
D.介质访问控制子层
答案
参考答案：A, C, D
搜题请搜索小程序“爱下问搜题”
IEEE802标准将局域网层次模型分为（）。
A.物理层
B.网络层
C.逻辑链路控制子层
D.介质访问控制子层
参考答案：A, C, D
| 选词填空。 | |
| |
| Sam had a dog. Its name was Tod. It was very helpful, but it ate 1.______So he didn't like it. He wanted to 2.______ Tod. He tied Tod and put it in a small boat. He rowed (划) the boat to the 3.______of a big river. Just as he 4.______the poor animal into the river, the boat began to go down. 5.______the man and Tod fell into the river. Tod was able to swim, 6.______Sam couldn't. The dog bit ( 咬) the rope and broke it. It tried 7.______best to swim to Sam. The man was saved, so he was very 8.______to the dog, and he didn't want to kill the dog 9.______. From then on, he gave the dog as much 10.______ it wanted. |