EPQ
目的酶基因的DNA区段一侧含有一酶切位点，可用什么方法对酶分子进行改造（） 寡核苷酸引物突变法。 盒式突变。 PCR定点突变法。 大引物突变法。 E易错PCR法。
医疗器械根据结构特征的不同，分为（）和（）。根就是否接触人体，分为（）和（）。
Your company has 10 servers that run windows server 2008. The servers have RDP enabled for server administration. RDP is configured to use default security settings. All administrators computers run widows vista. You need to ensure the RDP connections are as secure as possible. Which two actions should you perform? （） Set the security layer for each server to the RDP security layer.。 Configure the firewall on each server to block port 3389.。 Acquire user certificates from the internal certificate authority.。 Configure each server to allow connections only to remote desktop client computers that use network level authentication.。
You work in a company which uses SQL Server 2008. You are the administrator of the company database. In your company there is a server which contains a default SQL Server 2005 instance. For a new application, you have to install a SQL Server 2008 instance on the server. Your company CIO assigns a task to you. You must make sure that the respective certified third-party applications have access to both database instances. You have to achieve this goal without changing the existing application environments. So what should you do to achieve this by using as little database administrative effort as possible?（） You should install SQL Server 2008 as a named instance, and make the new application to use the new instance. 。 You should install SQL Server 2008 as the default instance, and make the new application to use the default instance. 。 You should upgrade the SQL Server 2005 application to use SQL Server 2008. 。 You should upgrade the SQL Server 2005 instance to a SQL Server 2008 instance.&e。
您应该选择一个类，是从小的和大的集合中恢复关键项的最好的。您应该选择哪一个类？（）
