标准机柜的内宽是(). ["19英寸","21英寸","32寸","30英寸"]
过盈量较大的过盈连接装配应采用(). ["压入法","热胀法","冷缩法","挤压法"]
办理包裹托运时,对()应优先安排装运。 ["类端精密产品","食品","贵重物品和重要文件","抢险救灾物资零星支农物资,急救药品"]
国际电信联盟严格界定了信息产业的范畴有哪些()? ["A、电信服务与设备","B、计算机服务与设备","C、声音与图像传播及其设备","D、音像娱乐业"]
如果采用双绞线作为水平子系统的线缆,那么线缆的最大长度为(). ["120m","200m","100m","90m"]
夏启结束了部落联盟首领实行的(),开始了()