You have enabled resumable space allocation in your database by setting the RESUMABLE_TIMEOUTparameter set to a nonzero value.Which three statements about resumable space allocation are true? （）(Choose three.) Even with resumable space allocation enabled for your database, you can disable resumable space allocation for a single session.。 A resumable statement is suspended only if an out of space error occurs.。 When a resumable statement is suspended, the transaction that contains the statement is also suspended.。 A resumable statement can only be suspended and resumed once during the execution of the statement.。 You can query the V$SESSION_WAIT dynamic performance view to identify the statements that are suspended for a sessio。
患者，男性，45岁，ARF多尿期，下列哪项不是该患者此期的症状（） 低血钾。 低血钠。 血中非蛋白氮减少。 脱水。 氮质血症。
Exhibit You work as a database administrator for Supportcenter.cn. While creating a new user or changing the password for existing users， the password must adhere to the restrictions specified in the exhibit. Which option would you use to achieve this objective？（） Use a trigger to validate the password。 Use a user defined PL/SQL block to validate the password。 Use a profile to include the password verify function to validate the password。 Use Oracle’s default password verification procedure to validate the password。 Use a procedure name in the CREATE USER command to validate the password。
When should you create a role? （） To simplify the process of creating new users using the CREATE USER xxx IDENTIFIED by yyy statement.。 To grant a group of related privileges to a user.。 When the number of people using the database is very high.。 To simplify the process of granting and revoking privileges.。 To simplify profile maintenance for a user who is constantly traveling.。
某水闸共10孔，每孔净宽10.0m。底板厚1.6m，闸室总宽112.8m，顺水流长16.Om；闸室及翼墙底板基础采用水泥土搅拌桩处理。其主要工程内容有：①地基与基础；②闸室段（土建）；③上游连接段；④下游连接段；⑤消能防冲段；⑥交通桥（工作桥）；⑦金属结构及启闭机安装；⑧启闭机房和桥头堡。施工过程中，发生如下事件：
事件1：水泥土搅拌桩在施工前进行了2根工艺性试验桩，确定了施工参数。
事件2：水泥土搅拌桩施工完成后，施工单位对基坑进行了开挖，按规范要求对水泥土搅拌桩进行了检测。检测合格后，施工单位组织项目法人、监理、设计、质量监督、运行管理等单位组成联合小组，共同检查核定其质量等级并填写签证表。
事件3：水闸闸墩施工正值高温季节，为此，施工单位采取了多项温控措施保证混凝土施工质量。
事件4：本工程共划分为1个单位工程。单位工程完成后，监理单位组织项目法人、设计、施工、运行管理、质量监督等单位组成外观质量评定小组，现场进行工程外观质量检验评定，并将评定结论报工程质量监督机构核备。
事件1中的做法是否妥当？并说明理由。
设计在50赫兹电源上运行的三相异步电动机现改为在电压相同频率为60赫兹的电网上运行，其电动机的（）。
