氧气用的瓶阀，出气口螺纹应是外螺纹（）。 ["左旋","右旋","左或右"]
Which two statements are true about the role of split horizon？（） ["It is a function used by routing protocols to install routes into routing table","It is a function that prevents the advertising of routes over an interface that the router is usingto reach a route","Its function is to help avoid routing loops.","It is a redistribution technique used by routing protocol"]
第二级准备
书院产生的历史背景是怎样的？
一栋房屋价值60万元，屋主以此屋为保险标的投保火险，保险金额为50万元。后在保险期内因第三者的责任引发火灾并造成房屋全部毁坏。被保险人是否可向保险公司索赔和责任方索赔？能否同时获得两笔赔款？
存款稳定率
