根据《混凝土结构耐久性设计规范》(GB/T50476―2008),一般环境对钢筋和混凝土材料的腐蚀机理是() ["反复冻融导致混凝土损伤","保护层混凝土碳化引起钢筋锈蚀","氯盐引起钢筋锈蚀","硫酸盐等化学物质对混凝土的腐蚀"]
建筑平面图中符号CM-般代表()。 ["窗连门","防火门","密闭门","普通门"]
下列关于绿色的描述准确的是() ["中性色的绿色象征着自然、生命、希望、和平、健康、安全","易于和其他颜色搭配","深绿意味稳定、沉着,嫩绿有新鲜、清新、生机勃勃的感觉","与环境、健康、教育相关的网站经常使用"]
Examine the diagram. A network administrator has recently installed the above switched network using 3550s and would like to control the selection of the root bridge. Which switch should theadministrator configure as the root bridge and which configuration command must theadministrator enter to accomplish this?() ["DSW11(config)# spanning-tree vlan 1 priority 4096","DSW12(config)# set spanning-tree priority 4096","ASW13(config)# spanning-tree vlan 1 priority 4096","DSW11(config)# set spanning-tree priority 4096","DSW12(config)# spanning-tree vlan 1 priority 4096","ASW13(config)# set spanning-tree priority 4096"]
检修车间内高、低压电气设备和线路时,为确保安全应先做些什么?
目前,应用于互联网上的流媒体发布方式主要有:()、()、()和()等四种方式。