重力式码头墙后吹填时，应对吹填的高度、码头前后水位、码头的位移和沉降进行观测，其主要目的是（）。
A. 为及时发现和防止码头产生过大变形
B. 为统计吹填工作量
C. 决定吹泥管口的位置
D. 为确定合适的围堰高程
查看答案
While Monitoring the space usage in your database that is in ARCHIVELOG mode you observed that the flash recovery area does not have enough free space to accommodate any more files and you do not have necessary permissions to add more space to it. Identify the two events that can occur in the event of a log switch？（）
An entry is created in the alert log file and the database instance continues to function normally
B. The log switch hangs occur for transactions until free space is available in the flash recovery area
C. The Oracle database server deletes a file that is on the obsolete file list to make free space in the flash recovery area
D. The database instance status is implicitly changed to RESTRICTED mode and file creations to the flash recovery area are prevented
血透护士对内瘘动脉穿刺的顺序（）
A. 从近心端到远心端
B. 从远心端到近心端
C. 在吻合口1cm处
D. 定点在某一处
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