Which technology/feature is designed to maximize the benefit of using SSD drives? （） Easy Tier。 FlashCopy。 Encryption。 Metro Mirror。
提出“小的是美好的”这一说法的是（）。 阿尔弗雷德·马歇尔。 舒马赫。 约翰，穆勒。 马科斯·韦伯。
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You have lost all your RMAN backup set pieces due to a disk failure. Unfortunately， you have an automated cross-check script that also does a delete expired backupset command. You have restored all the backup set pieces from tape. What command would you use to get those backup set pieces registered in the recovery catalog and the control file of the database again？（） register database。 recover catalog。 load backupset。 synch metadata。 catalog start with。
丝裂霉素抑菌的作用机制是（）
