问题
填空题
交换式局域网增加网络带宽，改善网络性能的根本原因是【 】之间的多对节点的并发连接。
答案
参考答案：交换机端口节点
解析：交换式局域网增加网络带宽，改善网络性能的根本原因是交换机端口节点之间的多对节点的并发连接。
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交换式局域网增加网络带宽，改善网络性能的根本原因是【 】之间的多对节点的并发连接。
参考答案：交换机端口节点
解析：交换式局域网增加网络带宽，改善网络性能的根本原因是交换机端口节点之间的多对节点的并发连接。
根据对话内容，从方框中所给的七个选项中选出五个句子补全对话，使对话完整、通顺。并将所选标号在对话后面的横线上。 Li Yang: Good morning, Mathew. Mathew: Good morning, Li Yang. 小题1: Li Yang: There's still smog（雾霾）today. We'll have to go to school with face masks（口罩）． Mathew: 小题2: According to the news, PM2.5 pollution is the main problem with air pollution. Li Yang: Yes, and air pollution has done harm to people's health. Mathew: So the Chinese government and Chinese people must take action to fight it. Ji Yang: 小题3: Mathew: Since PM2.5 is mainly caused by vehicles（机动车）and factories, cars with large emissions（排放）should not be allowed and factories should be closely watched. Li Yang: 小题4: We hope that more and more people will join us in making the blue skies return for good. Mathew: 小题5:
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