简要说明什么是信息系统，其典型的数据处理有哪些？ 正确。 错误。
（）是企业研究与开发能力的基石。 正确。 错误。
You are developing an application that uses role-based security. The prinicipal policy of the application domain is configured during startup with the following code：AppDomain.CurrentDomain.SetPrincipalPolicy（PrincipalPolicy.WindowsPrincipal）； You need to restrict access to one of the methods in your application so that only members of the local Administrators group can call the method. Which attribute should you place on the method？（） 正确。 错误。
专业性安全检查表主要（）的安全检查。 正确。 错误。
Critical services are running on CKD20， a domain controller. You have completed restructuring the organizational unit hierarchy for the domain and deleted the needless objects. What would you do to perform an offline defragmentation of the Active Directory database on CKD20 while ensuring that the critical services remain online（） 正确。 错误。
在信用证业务中，信用证的开立是以买卖合同为基础的，因此，信用证条款与买卖合同条款严格相符是开征行向受益人承担付款责任的前提条件。
