You work in a company which 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 stored procedure. The stored procedure implements a database maintenance process. A SQL Server Agent job should be created to that runs the stored procedure. Besides this， you must make sure that after it is completed successfully， the job is removed. What should you do？ （） You should create a job which is assigned to the Database Maintenance category。 You should create an Alert which will run another to delete the maintenance job.。 You should create a job. You schedule the job to run only once.。 You should create a job. The job uses the Automatically delete job optio。
什么是刻板印象？刻板印象的存在对旅游服务有什么不利影响？
《尚书》
产玻璃纤维增强水泥聚苯复合保温板一般要求强度等级为（）的快硬硫铝酸盐水泥。 42.5。 52.5。 62.5。 72.5。
某年二月十三日，发现某单位二人孙××死在室内，头部、腰部均有多处伤痕，案件性质不明。[现场简况]尸体仰卧于西墙北部靠门地上，尸体右侧地面有多量散在的血迹，房门南侧水缸的缘沿上有大量擦拭状血迹。[尸检简见]死者发育营养状况一般，尸僵已形成，尸斑于背臀部呈淡红色。衣裤完整无缺，两袖有多量喷溅血迹，裤腰及前裆有大量血迹。头部血迹模糊，额顶部17×6厘米2范围内有纵形线状创口三十一处，前顶伤痕轻而浅，仅伤及头皮及骨膜，前额伤痕重而深。颜面布满血迹，睑结合膜苍白，耳鼻口均无异常。颈胸部有大量流柱状血迹。腹部有浅状纵横交错的创口五道，脐上有横行线状划破伤三道，长五厘米。腹白线（正中部）处有纵行走向的腹壁伤创二道，深达腹腔，长14厘米，部分小肠涌出。以上伤创的创缘较整齐，周围未见挫伤带。双手染有大量血迹，无伤痕。试分析：孙××之伤痕有何特点？
引入或创设一种具体的场景进行知识教学的教学策略是（）
