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含碳量〉0.9%的钢材是工程上应用最广泛的铁碳合金。
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矿井应当建立事故隐患举报奖励制度，公布事故隐患举报电话，接受从业人员和社会（）。
《安全生产法》不仅适用于生产经营单位，同时也适用于国家安全和社会治安方面的管理。
As an experienced network engineer, you are asked to troubleshoot a CIS network outage. During the troubleshooting process, you notice that one of your colleagues connects additional devices to the network with the use of his own switch. With the purpose of improving speed, the switch is attached to both network ports in an office, which leads to bridge loop. Enabling which of the following feature will be able to prevent this problem from happening again?（）
在数据通信中，当发送数据出现差错时，发送端无须进行数据重发的差错控制方法为（）。
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