【单选题】
集线器和路由器分别运行于OSI参考模型的___。
A. 数据链路层和物理层
B. 网络层和传输层
C. 传输层和数据链路层
D. 物理层和网络层
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答案
D
解析
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【单选题】
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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B. 数据链路层的主要任务是提供一种可靠的通过物理介质传输数据的方法
C. 将数据分解成帧，按顺序传输帧，并处理接收端发回的确认帧
D. Ethernet的数据链路层分为LLC和MAC子层，并在MAC子层使用CSMA/CD协议争用信道
【单选题】
下面属于TCP/IP协议族中网络互联层协议的是___。
A. IGMP、UDP、IP
B. IP、DNS、ICMP
C. ICMP、ARP、IP
D. FTP、IGMP、SMTP
【单选题】
Having practiced so many times, I feel very ___ of my ability to deliver the presentation successfully.
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He has made it very clear ___ we should observe the new rules.
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___ they have written about the behaviors of animals is hardly anything new.
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【单选题】
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有关高渗性非酮症糖尿病昏迷的叙述，下列哪一项是正确的___
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【单选题】
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患者，女，40岁，因近1个月怕热.多汗.情绪激动，且经常腹泻.心悸而门诊检查体检：甲状腺肿大，两手微抖，眼球稍突，实验室检查：FT?16μmol/L，FT?42μmol/L诊断为甲状腺功能亢进症收入院进一步诊治，你认为下列哪项不属于护理诊断___
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【单选题】
关于糖尿病的饮食护理，错误的是___
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44岁女性患者，临床症状不明显，空腹血糖6.8mmol/L，疑诊为糖尿病，确诊需做___
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