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维纶的缩醛度一般在（）

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采出矿石量与矿石的工业储量的百分比，叫做矿石的（）。

A. 回收率
B. 贫化率
C. 损失率

土地价格一旦形成，便不会再有所变动，而成为某个固定价值。

A. 正确
B. 错误

某项工程项目业主（甲方）与某施工单位（乙方）签订了工程施工承包合同。合同中预算工程量为9000m²，综合单价为1100元/m²。合同工期为6个月。合同有关条款如下：（1）开工前业主应向承包商支付合同总价10%的工程预付款；（2）业主自第一个月起，从承包商的工程款中，按3%的比例扣留质量保修金；（3）当累计实际完成工程量超过（或低于）预算工程量的15%时，可进行调价，调价系数为0.9（或1.1）；（4）每月签发付款最低金额为60万元；（5）工程预付款从乙方获得累计工程款超过合同价35%以后的下一个月起，至第5个月均匀扣除。（6）工程质量保修期为2年.保修期满甲方将质量保修金返还乙方。承包商每月实际完成并经签证确认的工程量见下表。每日实际完成工程量工程按合同工期完工，经竣工验收合格，双方办理了工程竣工结算。竣工验收10个月后，因质量问题业主要求施工单位维修，施工单位置之不理，业主另请其他施工单位进行了维修，维修费用1.2万元。预算合同总价为多少？

Start of repeated scenarioYou are an enterprise desktop support technician for Fabrikam, Inc. Active Directory InformationThe company has a main office and a branch office. The main office hosts all of the companys servers. The main office connects to the branch office by using a WAN link. The network contains a single Active Directory domain that has 500 users. The domain contains three domain controllers and an enterprise root certification authority (CA). All servers run Windows Server 2008 R2. All user accounts are in an organizational unit (OU) named Employees. The computer accounts for all desktop computers are in an OU named Desktops. The computer accounts for all portable computers are in an OU named Laptops. A startup script is deployed to all computers by using Group Policy objects (GPOs). Client ConfigurationsAll client computers run Windows 7 Enterprise. All users have desktop computers. All computers are members of the domain. All desktop computers use wired connections to connect to the network. All portable computers use wireless connections to connect to the network. The wireless network is secured by using EAP-TLS. Company policy states that all client computers must be configured by using DHCP. The company has an internal Web site. The Web site is configured to useSSL encryption and to require client certificates. All company users can access the internal Web site. End of repeated scenario Users in the branch office report slow network performance when they connect to the file shares in the main office. You need to recommend a solution to improve performance when users access the file shares from the branch office. The solution must minimize hardware costs. What should you recommend implementing?（）

A. BranchCache
B. DirectAccess
C. Distributed File System Replication (DFSR)
D. Universal Group Membership Caching