按照《特种设备安全监察条例》规定，特种设备使用单位必须履行（）义务。 正确。 错误。
教师为什么要进行课堂观察和课例研究。 正确。 错误。
A system is being planned with three production partitions, one each for an IBM i, AIX standard edition, and Power Linux applications. One fibre-channel attached TS3100 tape library will be shared between the partitions for backup. Which solution provides tape library sharing with minimum operator intervention?（） 正确。 错误。
A customer has 12 x445s and 20 x365s in their datacenter that are dedicated to production workloads. The customer wants to standardize on IBM Director as their Intel environment systems management platform. Which server platform is supported as a Director server？（） 正确。 错误。
修剪的技术要点： 正确。 错误。
【背景资料】某9层住宅项目，某装饰施工单位负责内外装饰装修，装饰内容较多，竣工后不久发现部分楼层水泥砂浆地面大面积起砂、空鼓、裂缝，外墙砖空鼓、脱落等。
请根据背景资料完成相应小题选项对严重起砂的地面，应把面层铲除后，重新铺设水泥砂浆面层。
