Which command will set the core size file to unlimited for the user ‘webapp’？（） ["no -p ’core=-1’ webapp","chuser ’core=-1’ webapp","setsenv -attr ’core=unlimited’ webapp","chsec -f ’\/etc\/security\/limits’ ’core=-1’ weba"]
糖皮质激素类药物的禁忌证包括（） ["肾病综合征","活动性消化性溃疡","类风湿性关节炎","未能控制的真菌感染","股骨头坏死"]
While designing your database， you have created the EMPLOYEES table as an index-organized table （IOT）. You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（） ["A primary key must have been created.","A mapping table must have been created.","An overflow tablespace must have been specified.","The PCTTHRESHOLD option must have been specified."]
排水系统布置应遵循的原则有（）。 ["排水沟道要处于控制面积的最低处，以求尽量自流排水","根据地形应将排水地区划分为高.中.低等片，做到高水高排，低水低排，自排为主，抽排为辅","排水干沟的出口应选择在容泄区水位较高和河床比较稳定的地方","排水沟布置要避开土质好的地带，以节省工程费用并使排水安全及时","在有外水入侵的排水区，不应布置截流沟或撇洪沟"]
In your datawarehousing application， you generate reports frequently. The data is static in the tables being used to generate reports. You are currently using joins， resulting in a large performance overhead. What kind of database structure would you use to reduce the response time of the query？（） ["hash clusters","index clusters","partitioned tables","index-organized table （IOT）"]
当前我国社区制存在哪些不足？
