光学树脂常用于制作镜片，它是一种有机材料，其分子间结构相对松弛，光线可通过率为84%－90%。下列关于光学树脂镜片的表达错误的是_________。
YouworkastheenterpriseexchangeadministratoratCompany.com.TheCompany.comnetworkconsistsofasingleActiveDirectorydomainnamedCompany.com.Company.comhasanExchangeServer2010organization.theCompany.comcontainsanexchangeserver2010servernamed-ex10thathasimap4installed.Theusersof.comuseimap4viatheinternettoconnectto-ex10.youhavereceivedinstructionsfromtheciotomakesurethatthecanuse-ex10toconnecttotheinternet.Whatshouldyoudo？（）
YournetworkconsistsofasingleActiveDirectorydomain.AllserversrunWindowsServer2008R2.YouneedtorecommendaGroupPolicydeploymentstrategy.Yourstrategymustsupportthefollowingrequirements：èDomain-levelGroupPolicyobjects（GPOs）mustnotbeoverwrittenbyorganizationalunit（OU）levelGPOs.èOU-levelGPOsmustnotapplytomembersoftheServerOperatorsgroup.Whatshouldyourecommend？（）
Oneoftheusecasesinyourwebapplicationusesmanysession-scopedattributes.Attheendoftheusecase，youwanttoclearoutthissetofattributesfromthesessionobject.Assumethatthisstaticvariableholdsthissetofattributenames：201.privatestaticfinalSet＜String＞USE_CASE_ATTRS；202.static{203.USE_CASE_ATTRS.add（"customerOID"）；204.USE_CASE_ATTRS.add（"custMgrBean"）；205.USE_CASE_ATTRS.add（"orderOID"）；206.USE_CASE_ATTRS.add（"orderMgrBean"）；207.}Whichcodesnippetdeletestheseattributesfromthesessionobject？（）
YourcompanyacquiresanewInternetdomainname.Youneedtoensurethatalluserscanreceivee-mailmessagessenttothenewdomainname.Whichtwoactionsshouldyouperform？（）
