下面哪条不是Bigtable主服务器的作用（） ["为每个子表服务器分配子表，对外提供服务","对Bigtable表中的数据进行进行存储","探测子表服务器的故障与恢复","负载均衡"]
下列哪一种情形不成立累犯？（） ["张某犯故意伤害罪被判处有期徒刑3年，缓刑3年，缓刑期满后的第3年又犯盗窃罪，被判处有期徒刑10年","李某犯强奸罪被判处有期徒刑5年，刑满释放后的第4年，又犯妨害公务罪，被判处有期徒刑6个月","王某犯抢夺罪被判处有期徒刑4年，执行3年后被假释，于假释期满后的第5年又犯故意杀人罪被判处无期徒刑","田某犯叛逃罪被判处管制2年，管制期满后20年又犯为境外刺探国家秘密罪，被判处拘役6个月"]
Your database instance is configured with automatic undo management and the UNDO_RETENTION parameter is set to 900 seconds. You executed the following command to enable retention guarantee： SQL> ALTER TABLESPACE undotbs1 RETENTION GUARANTEE； What effect would this command have on the database（） ["The extents in the undo tablespace retain data until the next full database backup.","The extents containing committed undo in the undo tablespace are not overwritten for at least 15minutes.","The extents containing committed data in the undo tablespace are not overwritten until the instance isshut down.","The extents containing committed undo in the undo tablespace are transferred to Flash Recovery Areabefore being overwritten."]
个人依法享受社会保险待遇，无权查询本单位为其缴费情况。
离心式压缩机确定转子轴向位置的原则是什么？
《纸手铐：一部没有拍摄的影片和它的43个变奏》是一篇打破常规的散文，其作者是（）。
