题目内容

电石着火不能用()进行扑灭.

A. 消防炮
B. 二氧化碳灭火器
C. 干粉灭火器
D. 泡沫灭火器

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饮用水要求在流行病学上安全性,主要是为了确保()

A. 不发生消化道疾病
B. 不发生介水传染病
C. 不发生食物中毒
D. 不发生慢性非传染性疾病
E. 不发生水型地方病

可引起机体相应的功能障碍和器质性病变的选项是()

A. 心理社会因素作用过强
B. 个体对疾病的认识
C. 心理社会因素作用持续过短
D. 精神疾病对心理影响过程
E. 医治疾病对个体的躯体损害

To accomplish user-managed backup for the USERS tablespace, you issued the following command to put the database in backup mode: SQL> ALTER TABLESPACE users BEGIN BACKUP; While copying the file to the backup destination a power outage caused the instance to te minate abnormally. Which statement is true about the next database startup and the USERS tablespace?()

A. The database will open,and the tablespace automatically comes out of the backup mode.
B. The database will be mounted,and recovery must be performed on the USERS tablespace.
C. The database will be mounted,and data files in the USERS tablespace must be taken out of the backup mode.
D. The database will not be mounted,and you must restore all the data files for the USERS tablespace from the backup,and perform recovery.

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