【单选题】
在网络协议的三个基本要素中，_____是数据和控制信息的结构或格式。___
A. 语义
B. 语法
C. 服务
D. 词法
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答案
B
解析
暂无解析
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在下面对OSI参考模型的数据链路层的功能特性描述中，哪一项是不正确的？___
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下面属于TCP/IP协议族中网络互联层协议的是___。
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Having practiced so many times, I feel very ___ of my ability to deliver the presentation successfully.
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I’ll be happy to help you, ___ you won’t take up too much of my time.
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For years, scientists have debated the ___ dangers of building another nuclear plant after the terrible accident.
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It was a worthwhile attempt ___ it failed to achieve its purpose that we had hoped for.
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He has made it very clear ___ we should observe the new rules.
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It was when I read his letter ___ I realized he had given me huge help.
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【单选题】
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