下面哪些不属于组网拓扑切换?() ["频内切换,","基于覆盖的切换,","频间切换,","基站内切换."]
码头和油库罐区多少米内为禁止明火作业:() ["A、20","B、30","C、50","D、60"]
加强校园管理,要增加对重点区域的安全巡查次数,做好巡查记录,值班人员坚持12小时值班。()
有效的螨虫防制方法是() ["A、通风干燥","B、空间喷洒","C、滞留性喷洒","D、粘捕"]
扰乱学校秩序和侵害学生人身、财产安全的违法犯罪行为应予以处理,切实保障师生人身、财产安全。()
安检机构应当确保在用设备正常完好,在用计量器具依法进行()