引言内容可以包括（）。 前人工作。 理论依据和实验基础。 预期的结果。
在Dreamweaver中将文本添加到文档的方法不包括（） 直接在文档窗口键入文本。 直接在Dreamweaver 中打开文本文件。 从现有的文本文档中拷贝和粘贴。 导入Microsoft Word 内容。
酸性土壤的调节物质主要指（） 石灰。 石灰石粉。 石膏。 硫磺。 有机肥料。
下列哪项工程是国内首次尝试虚拟仿真技术应用于建筑工程。（） A.北京鸟巢 。 B.辽宁彩电塔 。 C.上海轨道交通12号线11标工程 。 D.上海正大广场的施工。
You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database named DB1 in the instance. You have set the recovery model of DB1 to Full. At 2：00 There is a full database backup of all the user databases every day. Every quarter the transaction log backup is performed. Every 4 hours a differential backup is occurred. You are going to perform a full backup of DB1 at 11：00. When you perform this back up， you must make sure that the overall backup will not be affected. What'；s more， you have to restore procedures for DB1. You must make sure that the backup files are restored in proper sequence. In the options below， which Transact-SQL statement should you use？（） BACKUP LOG DB1 TO DISK = 't:\backups\db1.trn'; 。 BACKUP DATABASE DB1 TO DISK = 't:\backups\db1.bak' WITH DIFFERENTIAL; 。 BACKUP DATABASE DB1 TO DISK = 't:\backups\db1.bak' WITH NOUNLOAD; 。 BACKUP DATABASE DB1 TO DISK = 't:\backups\db1.bak' WITH COPY_ONLY;&e。
本票与汇票的区别在于（）。
