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制定《中华人民共和国特种设备安全法》作用之一,就是明确特种设备生产、使用单位在特种设备安全方面的义务和法律责任。

A. 正确
B. 错误

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Refer to the exhibit. A junior network administrator was given the task of configuring port security on SwitchA to allow only PC_A to access the switched network through port fa0/1. If any other device is detected, the port is to drop frames from this device. The administrator configured the interface and tested it with successful pings from PC_A to RouterA, and then observes the output from these two show commands.Which two of these changes are necessary for SwitchA to meet the requirements? ()

A. Port security needs to be globally enabled.
B. Port security needs to be enabled on the interface.
C. Port security needs to be configured to shut down the interface in the event of a violation.
D. Port security needs to be configured to allow only one learned MAC address.
E. Port security interface counters need to be cleared before using the show command.
F. The port security configuration needs to be saved to NVRAM before it can become active.

2008年12月26日,由新一代战舰“武汉”号、“海口”号导弹驱逐舰和“微山湖”号综合补给舰组成的护航编队从()出发,这是我国首次使用军事力量赴海外维护国家战略利益,履行国际人道主义义务。

A. 海南三亚
B. 广东湛江
C. 浙江舟山
D. 山东青岛

外因火灾是偶然事件,当通风条件适宜且有大量可燃物时,可在很短的时间内形成大范围的火区,燃烧生成大量的有毒有害气体,使风流中的氧气浓度下降,同时燃烧产生的大量热量,使风流温度升高。

A. 正确
B. 错误

2014年1月1日起施行的《中华人民共和国特种设备安全法》中所称的特种设备是指涉及生命安全、危险性较大的锅炉、压力容器(含气瓶)、压力管道、电梯、起重机械、客运索道和大型游乐设施七类设备。

A. 正确
B. 错误

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