什么是目录和目录服务？
热反射玻璃是表面镀有对太阳光有反射作用的金属、非金属及其氧化物等各种薄膜，其反射率可达（）。 A.10％～20％ 。 B.20％～40％ 。 C.30％～50％ 。 D.40％～50％。
关键字之间使用（）分隔。 冒号。 顿号。 逗号。 分号。
You are creating a Windows Communication Foundation (WCF) service based on WSHttpBinding. New audit requirements dictate that callers must be authenticated on every call to ensure that their credentials have not been revoked.You need to ensure that the service will not cache the security request token. What should you do?（） Apply a ServiceBehavior attribute to the service implementation class with the lnstanceContextMode property set to Single.。 In the message security configuration, change clientCredentialType from lssuedToken to UserName。 In the message security configuration, set establishSecurityContext to false.。 At the end of every operation, call the SessionStateUtility.RaiseSessionEnd method.。
选举权是公民有序进行政治参与的最重要、最直接、最广泛的（）。 政治权势。 政治权利。 政治权威。 政治权力。
A new router is added to an existing HSRP standby group. One of the existing routers is in anactive state， the other is in a standby state. Under what circumstance will the new router becomethe active router？（）
