每个共享式以太网中的站点都会过滤收到的帧，每个站点可能会接收三种帧：单播帧、广播帧和多播帧。（ ）
查看答案
以太网对数据帧不进行编号，也不要求对方发回确认，因此以太网提供的服务是不可靠的交付，即尽最大努力的交付。（ ）
A. 对
B. 错
The years having gone by, I found she had ________
A. a little white hairs
B. some white hair
C. much white hair
D. a few white hairs
Our ______ protects us from the cold.
A. dress
B. clothing
C. clothes
D. cloth
________ car broke down on the way , but luckily they knew how to fix it.
A. Tom's and Jane's
B. Tom's and Jane
C. Tom and Jane's
D. Tom and Jane
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