司机发现通过信号机故障时，应将故障信号机的（）通知前方站（列车调度员）。
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若需进行方案投产后的净收益对回收方案总投资快慢的影响分析，通常可选用（）。
A. 财务净现值
B. 财务内部收益率
C. 投资收益率
D. 投资回收期
抢险救援手套是消防员在抢险救援作业时用于对手和腕部提供保护的专用防护手套。
A. 正确
B. 错误
You are administering a database stored in Automatic Storage Management (ASM). You use RMAN to back up the database and the MD_BACKUP command to back up the ASM metadata regularly. You lost an ASM disk group DG1 due to hardware failure. In which three ways can you re-create the lost disk group and restore the data?（）
A. Use the MD_RESTORE command to restore metadata for an existing disk group by passing the existing disk group name as an input parameter and use RMAN to restore the data.
B. Use the MKDG command to restore the disk group with the same configuration as the backed-up disk group and data on the disk group.
C. Use the MD_RESTORE command to restore the disk group with the changed disk group specification, failure group specification, name, and other attributes and use RMAN to restore the data.
D. Use the MKDG command to restore the disk group with the same configuration as the backed-up disk group name and same set of disks and failure group configuration, and use RMAN to restore the data.
E. Use the MD_RESTORE command to restore both the metadata and data for the failed disk group.
F. Use the MKDG command to add a new disk group DG1 with the same or different specifications for failure group and other attributes and use RMAN to restore the data.
借款人不得用贷款从事股本权益性投资，国家另有规定的除外
A. 正确
B. 错误
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