简述模块测试和子系统测试的含义。
对产生尘、毒危害较大的工艺、作业和施工过程，应采取措施是什么？
The network is being flooded with invalid Layer 2 addresses， causing switch CAM tables to befilled and forcing unicast traffic to be transmitted out all switch ports. Which type of Layer 2 attackis being used here？（） ["MAC spoofing","VLAN hopping","MAC address flooding","DHCP flooding","Session hijacking"]
楚歌体
可控性玻璃屋顶采取玻璃屋顶和贮水屋顶、（）相结合的措施。 ["太阳能屋顶","普通屋顶","绿化屋顶","冷屋面"]
全要素生产率
