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气胀式救生筏静水压力释放器,除可自行调换的静水压力释放器外,应予以多久检修?

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简述闲谈的作用。

The datafiles of your database are ASM files. You are performing a check for datafile block corruption by using the DBVERIFY utility. What is a prerequisite for checking block corruption on an ASM datafile by using the DBVERIFY utility?()

A. The block change tracking feature must be enabled.
B. OMF must be configured on your database.
C. The database must be in ARCHIVELOG mode.
D. A USERID must be supplied.

婴幼儿对周围环境中突然出现的较大声响反应淡漠,应考虑是否有()异常。

A. 视力
B. 听力
C. 感觉
D. 知觉

在穿越公路立交桥上作业时,应设置防护网并派人到桥下监护,防止砸伤车辆和行人。

A. 正确
B. 错误

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