题型:单项选择题 组建快速以太网,需要使用的硬件设备和环境有( )。 Ⅰ.100BASE-T集线器/交换机 Ⅱ.高速传输带宽 Ⅲ.10/100BASE-T网卡 Ⅳ.局域网交换机可以支持虚拟局域网服务A.Ⅰ、Ⅲ和ⅣB.Ⅱ、Ⅲ和ⅣC.Ⅰ、Ⅱ和ⅢD.全部 查看答案
题型:单项选择题 After people have learned that magnets attract things, centuries passed______they took note of the fact that magnets sometimes also repel things.A.beforeB.untilC.afterD.since 查看答案