采用滑车组起吊重物时，当重物提升到最高点时，定滑车与动滑车间的距离要大于安全距离，顺穿时要不小于轮径的（）倍。
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You are using the control file to maintain information about the database backups that are being performed by Recovery Manager (RMAN). Identify two scenarios is which you must have a recovery catalog.（）
A. To store the backup information of multiple database
B. To restrict the amount of space that is used by the backups
C. To maintain a backup for a certain time is set by the CONTROL_FILE_RECORD_KEEP_TIME parameter.
D. To list the data files that were in a target database at a given time by using the AT option of REPORT SCHEMA command.
属于汇票必要项目的是（）
A. “付一不付二”的注明
B. 付款时间
C. 对价条款
D. 禁止转让的文字
以下是国务院确定的汉地佛教重点寺院的是（）。
A. 少林寺
B. 祝圣寺
C. 麓山寺
D. 南岳火庙
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