You want to take the backup of the USERS tablespace. It has a single data file of 900 MB. You have tape drives of 300 MB each. The SBT channel is configured for Recovery Manager (RMAN). To accomplish the backup, you issued the following RMAN command: RMAN> BACKUP SECTION SIZE 300M TABLESPACE users; Which two statements are true about the execution of the above command? （）(Choose two.) The backup piece size will be limited to 300 MB。 The RMAN uses multiplexing to perform backup。 The operation is accomplished using the default channel available。 The RMAN parallelizes the backup although the parallelism is not set for a channel。
金先生，52岁。十二指肠溃疡25年，上腹部隐痛1年，近1个月又出现呕吐，吐隔夜宿食，呕吐逐渐加重；精神状态差，消瘦明显，皮肤弹性差，贫血貌；胃镜检查确诊为十二指肠溃疡并幽门梗阻。决定近期行胃大部切除术。从提高手术耐受力考虑，首要的护理诊断是（） 活动无耐力。 知识缺乏。 营养失调：低于机体需要。 焦虑、恐惧。 有感染的危险。
培训和发展方式通常分为三大类：（）、（）和（）
Which MySQL utility program should you to process and sort the slow Query log based on query time or average query time?（） Mysqlaccess。 Mysqldump。 Mysqlshow。 Mysqlslow。 Mysqldumpslow。
蓝细菌、原生动物、红螺菌、甲烷菌、硝化细菌分别属于哪种营养类型？
完善电力建设施工应急机制的具体措施不包括（）
