按照有关规定已经缴纳船舶吨税的船舶，自车船税法实施之日起5年内免征车船税。（）
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会计主管按（）检查定期结息，审查利率执行，利息计算表与借款凭证利率核对一致。
A. 日
B. 周
C. 旬
D. 月
97型25Hz相敏轨道电路在调整状态时，轨道继电器轨道线圈上的有效电压应不小于（）V。
A. 10.5
B. 16
C. 18
D. 20
The UNDO_RETENTION parameter in your database is set to 1000 and undo retention is not guaranteed. Which statement regarding retention of undo data is correct？（）
A. Undo data becomes obsolete after 1，000 seconds.
B. Undo data gets refreshed after every 1，000 seconds.
C. Undo data will be stored permanently after 1，000 seconds.
D. Committed undo data would be retained for 1，000 seconds if free undo space is available.
E. Undo data will be retained in the UNDO tablespace for 1，000 seconds，then it gets moved to the TEMPORARY tablespace to provide read consistency.
立功，是指犯罪分子（），查证属实，或者提供（），从而得以侦破其他案件等行为。
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