充装气瓶时液化石油气喷在操作者身上，易造成（）。 ["擦伤","烫伤；","烧伤；","冻伤"]
What will be the result of using the SQL> DROP USER SCOTT CASCADE； command？（） [" The user， Scott， is dropped， all the objects in Scott’s schema are placed in the Recycle Bin， and the objects that are already in the Recycle Bin are dropped."," The user， Scott， is dropped， all the objects in Scott’s schema are placed in the Recycle Bin， and all the objects in the Recycle Bin， belonging to the user Scott， are not dropped."," The user， Scott， is dropped， all the objects in the Scott’s schema are not placed in the Recycle Bin， and the objects in the Recycle Bin， belonging to the user， Scott， are not dropped."," The user， Scott， is dropped， all the objects in Scott’s schema are not placed in the Recycle Bin， and the objects in the Recycle Bin are dropped."]
俾斯麦出任普鲁士首相后，推行“铁血政策”目的是（）。 ["使用武力巩固统治","镇压人民革命运动","扫清障碍实现统一","维护维也纳体系"]
冷轧带肋钢筋试件拉伸试验结果，其抗拉强度不得小于（）。 ["400N\/mm2","450N\/mm2","500N\/mm2","550N\/mm2"]
You are using Recovery Manager (RMAN) with a recovery catalog to back up your production database. Thebackups and the archived redo log files are copied to a tape drive on a daily basis. Because of media failure,you lost your production database completely along with the recovery catalog database.You want to recover the target database and make it functional. You consider performing the following steps to accomplish the task: 1) Restore an autobackup of the server parameter file. 2) Restore the control file 3) Start the target database instance 4) Mount the database 5) Restore the data files 6) Open the database with RESETLOGS option 7) Recover the data files 8) Set DBID for the target database Which option illustrates the correct sequence that you must use?（） ["8，1，3，2，4，5，7，6","1，8，3，4，2，5，7，6","1，3，4，2，8，5，6，7","1，3，2，4，6，5，7，8"]
民法的基本原则有哪些？
