A company with three sites （one local production site， one intermediate site， and one remote site） wants to use Metro/Global Mirror. Which statement is correct about the volumes at the intermediate site（） the intermediate site volumes are Metro Mirror target volumes for the remote site。 the intermediate site volumes are Global Mirror target volumes for the remote site。 the intermediate site volumes are both Global Mirror source and Metro Mirror target at the same time。 the intermediate site volumes are alsoFlashCopy sources for the remote site。
组合式制动梁全长检修限度为（），超限时恢复原型。 1765～1700mm。 1762～177mm。 1643～1649mm。 1640～165mm。
Your production database is running in archivelog mode and you are using recovery manager (RMAN) with recovery catalog to perform the database backup at regular intervals. When you attempt to restart the database instance after a regular maintenance task on Sunday, the database fails to open displaying the message that the data file belonging to the users tablespace are corrupted. The steps to recover the damaged data files are follows: 1. Mount the database 2. Open the database 3. Recover the data file 4. Restore the data file 5. Make the data file offline 6. Make the data file online Which option identifies the correct sequence that you must use to recover the data files?（） 2, 4, 3。 1, 4, 3, 2。 2, 5, 4, 3, 6。 5, 2, 4, 3, 6。 1, 5, 4, 3, 6, 2。
（）不是变压器的主要构件。 初级线圈。 次级线圈。 磁芯。 开关。
现代农业
地下工程，铺贴厚度小于3mm的高聚物改性沥青卷材时，严禁采用的施工方法是（）。
