Air defense sirens will sound across the city at noon on September 16, which marks this year’s National Defense Education Day. The drill will test the city’s siren warning system and help residents to ...

ms:mtpsurl: https://technet.microsoft.com/zh-cn/library/Gg398915(v=OCS.15) _**上一次修改主题：** 2013-02-24_ 可以使用 Lync Server 控制面板“测试 ...