Your company has an Active Directory domain. The company has two domain controllers named DC1   and DC2. DC1 holds the schema master role.    DC1 fails. You log on to Active Directory by using the administrator account. You are not able to transfer  the schema master role.    You need to ensure that DC2 holds the schema master role.  What should you do（）

A、Register the Schmmgmt.dll. Start the Active Directory Schema snap-in.

B、Configure DC2 as a bridgehead server.

C、On DC2， seize the schema master role.

D、Log off and log on again to Active Directory by using an account that is a member of the Schema  Admins group. Start the Active Directory Schema snap-in.

半抗原检测叙述正确的是（）。

A、反应模式与克隆酶供体免疫测定相同

B、属双位点一步法测定

C、可使用酶扩大免疫技术（EMIT）测定

D、乙型肝炎表面抗原属半抗原

E、可用双抗体夹心法测定

Your company has an Active Directory domain.   A user attempts to log on to the domain from a client computer and receives the following message： "This  user account has expired. Ask your administrator to reactivate the account."  You need to ensure that the user is able to log on to the domain.  What should you do（）

A、Modify the properties of the user account to set the account to never expire.

B、Modify the properties of the user account to extend the Logon Hours setting.

C、Modify the properties of the user account to set the password to never expire.

D、Modify the default domain policy to decrease the account lockout duration.

Your network consists of an Active Directory forest that contains one domain named contoso.com AlI domain controllers run Windows Server 2008 and are configured as DNS servers You have two Active Directory-integrated zones ： contoso.com and nwtraders.com You need to ensure a user is able to modify records in the contoso.com zone. You must prevent the user from modifying the SOA record in the nwtraders.com zone What should you do（）

A、From the DNS Manager console， modify the permissions of the contoso.com zone.

B、From the DNS Manager console， modify the permissions of the nwtraders.com zone.

C、From the Actrve Directory Users and Computers console， run the Delegation of Control Wizard.

D、From the Actrve Directory Users and Computers console， modify the permissions of the Domain Controllers organizational unit （OU）.

沙门菌的血清分型抗原是（）。

A、O抗原

B、H抗原

C、F抗原

D、K抗原

E、Vi抗原

关于酶活性测定描述错误的是（）。

A、可测定产物生成量

B、可测定底物消耗量

C、与底物浓度无关

D、需要最适温度

E、需要最适酸碱度