高压为10KV级星形接线的变压器改成6KV三角形接线后，其容量（）。 降低。 升高。 不变。
36 You are creating a report wizard to create a matrix report. The query build, you select the patient_name column from the patient table; the doctor_name from the doctors table; and the doctor_ID, patient_ID and ID columns from the procedure table. In the report wizard you select patient_name as the row value, doctor_ID as the column values and the count as the cell values. You need to add a total for each doctors column. In the wizard report which tab will allow you to create the summary column?（） Rows 。 Totals 。 Columns 。 Cells 。 Data。
液化石油气中含有（）时，它会沉积在容器底部，既增加用户经济负担，又会引起容器底部腐蚀，缩短容器使用年限。 硫化氢。 甲烷。 戊烷。 水分。
You have enabled backup optimization in RMAN. You issue the following RMAN command to configure a redundancy-based retention policy： CONFIGURE RETENTION POLICY TO REDUNDANCY 3； Which statement is true？（） The command fails because you cannot configure a redundancy-based retention policy when backup optimization is enabled。 Backup optimization is performed， but RMAN considers the redundancy-based retention policy when it determines which datafiles should be backed up。 Backup optimization is permanently disabled。 Backup optimization is temporarily disabled because a redundancy-based retention policy is specified。
关于分离与牵拉的区别说法正确的是：（） 分离时外力要与关节垂直，牵拉时外力与骨长轴平行。 分离时外力要与骨长轴平行，牵拉时外力与关节垂直。 分离时两骨关节面必须分开，牵拉时可以不分开。 分离时两骨关节面可以不分开，牵拉时必须分开。 无论分离或牵拉时两骨关节面均需要分开。
You are maintaining your database in Oracle10g. You are not using the recovery catalog to maintain the backup information of your database. Which file can be used as a repository to store information regarding the RMAN backup？（）
