简述科赫原则。（如何判定某种微生物是病原菌？）
锚杆注浆浆液通常选用灰砂比1∶1.5～1∶2的水泥砂浆或水灰比为0.6～0.65的纯水泥浆
电子合同的免责事由主要有（） 网络中断。 文件感染病毒。 C非因自己原因的网络中断。 非自己原因引起的电子错误。
天然气管线进行换管维修时要用（）将焊口与原管线隔开。 用气囊隔离。 打黄油墙。 可直接焊接。 注水。
You work with a SQL Server 2005 database that provides banking information for customers. You want customers to see banking reports that combine data that is retrieved from the database with real-time investment information that comes from a Web service provided by a third party. The investment information must be current when the reports are executed. You need to create the appropriate objects that support the reports. What should you do?（） Publish the data in the database as an XML Web service by using the FOR XML AUTO clause. 。 Create a table to store the banking information for each customer. Create a trigger that fires when data is inserted into the table that joins with the data coming from the Web service. 。 Create a Transact-SQL stored procedure that uses a temporary table to store the banking information for each customer. Update the table with the values from the Web service. 。 Have a developer in your company create an assembly that calls the remote Web service. Create aCLR function by using the assembly. Call the CLR function and combine the results with banking information in the database.。
How can you reverse the effects of an ALTER DISKGROUP ... DROP DISK command if it has already completed？（）
