Which two VoIP capabilities are utilized when the CallManager and the gateway are configured for Survivable Remote Site Telephony？（） [" Analog phones， connected to the PSTN， act as internal call agents if IP communication to the CallManager is lost."," An onsite gateway reroutes calls over the PSTN if IP communication to the CallManager is lost."," The IP phones can reroute calls over the PSTN if IP communication to the CallManager is lost."," Local voice gateways can assume the function of a call agent if IP communication to the CallManager is lost."," IP phones use an internal call agent if IP communication to the CallManager is lost."]
在静特性曲线中，埋弧焊的焊接工艺参数在（）段内。 ["上升特性","平特性","下降特性","下降和平特性"]
临界比载是指导线在最高气温条件下的弧垂（）覆冰条件下的弧垂的比载。 ["小于","等于","大于","无关"]
教育观察研究的记录方法主要包括（） ["描述记录","取样记录","行为核对表","以上都是"]
素质教育要让学生感受、理解（）产生和发展的过程，培养学生的（）精神和创新思维能力，重视培养学生收集处理（）的能力、获取知识的能力、分析和解决问题的能力、语言表达能力以及（）和社会活动的能力。
说明句中的词类活用现象
孟尝君客我。
