Which two of these correctly describe asymmetric routing and firewalls?（） [" only operational in routed mode"," only operational in transparent mode"," only eight interfaces can belong to an asymmetric routing group"," operational in both failover and non-failover configurations"," only operational when the firewall has been configured for failover"]
现代汉语熟语有四种，它们各自都有比较明显的外部特征，例如“画虎画皮难画骨，知人知面不知心”是（），“老鼠爬秤台——自秤（称）自”是歇后语。
什么叫备用电源自动投入装置？
当最大弧垂发生于最高温度时，电线覆冰比载（）临界比载。 ["不小于","等于","大于","小于"]
说明句中的词类活用现象
逐之，三周华不注。
从功能看，“信、远、看、讲”是（）语素；从位置上看，“了、的、吗”是定位语素。
