[单选] You work as a database administrator for Supportcenter.cn. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it？（）

A . Uses undo data for roll forward
B . Uses Flashback Log for recovery
C . Uses online redo logs to roll back
D . Uses undo data to roll back the transaction
E . Uses Recovery Manager （RMAN） to roll back
F . Uses the System Monitor （SMON） background process to perform instance recovery

影响人际吸引的因素有（）外貌。能力。性格因素。相似互补。排球拦网技术的全过程是由：（）、（）、（）、（）和（）五环节组成。下列各选项中，（）最有利于节税企业间拆借和社会筹资。向金融机构贷款；。社会筹资和企业间拆借。企业内部入股发行股票。 Identify the memory component from which memory may be allocated for：（） 1. Session memory for the shared server 2. Buffers for I/O slaves 3. Oracle Database Recovery Manager （RMAN） backup and restore operations Large Pool。 Redo Log Buffer。 Database Buffer Cache。 Program Global Area （PGA）。工程变更依据其性质与对工程项目的影响程度，分为（）。重大工程变更。较大工程变更。中等工程变更。一般工程变更。常规设计变更。 You work as a database administrator for Supportcenter.cn. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it？（）

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[单选] You work as a database administrator for Supportcenter.cn. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it？（）

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