“查库专用介绍信”应按照检查需要的实际天数填写有效期限，最长不得超过（）天。
A. 10天
B. 15天
C. 20天
D. 30天
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施焊现场10米内，不准堆放易燃易爆物品，乙炔瓶与氧气瓶距离在5米内。
A. 正确
B. 错误
要件类档案是用于证明信贷业务法律行为的基本要件，要件类档案内容不包括（）。
A. 借款合同
B. 保证合同
C. 抵押合同
D. 购销合同
To enable faster incremental backups, you enabled block change tracking for the database.Which two statements are true about the block change tracking file? （）(Choose two.)
A. Multiple change tracking files can be created for a database.
B. The change tracking file must be created after the first level 0 backup.
C. RMAN does not support backup and recovery of the change tracking file.
D. The database clears the change tracking file and starts tracking changes again, after whole database restore and recovery operations.
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