鸦片战争前我国能够取得反侵略斗争胜利的主要原因是（）。 正确。 错误。
RMAN automatically propagate information about the database structure， archived redo logs， backup sets， and data file copies into the recovery catalog from the target database’s control file. This information can also be propagated to the catalog manually by using the （）command. 正确。 错误。
顶阻火器的作用是什么？ 正确。 错误。
基站固定式油机（）结合月检做一次负载运行测试，保证在市电故障的情况下油机能及时起动运行，以保障设备所需的正常供电 正确。 错误。
Your company has client computers that run Windows XP Professional. You are planning to install Windows 7 Enterprise on the existing client computers. You have the following requirements： Migrate user data and operating system components. Encrypt and password-protect the migration store. You need to design a user state migration strategy that supports the requirements. What should you do？（） 正确。 错误。
．GK阀止回阀铜套松动、弹簧折损、衰弱、外弹簧托板变形或裂损更换，止回阀裂纹时更换。
