Evaluate the following command and its output： SQL>SELECT * FROM dba_temp_free_space； TABLESPACE_NAME TABLESPACE_SIZE ALLOCATED_SPACE FREE_SPACE LMTEMP 250609664 101048576 149561088 Which two statements correctly interpret the output？（） FREE_SPACE indicates only the space that is currently unallocated.。 ALLOCATED_SPACE indicates only the space currently allocated and in use.。 FREE_SPACE indicates only the space that is currently allocated and available for reuse.。 ALLOCATED_SPACE indicates both the space currently allocated and used，and the space that is available for reuse.。 FREE_SPACE indicates both the space that is currently allocated and available for reuse，and the space that is currently unallocated.。
关于井底安全阀试问以下哪个是正确的：（） 阀开着和阀关着相比阀杆由园筒上伸出。 阀关着和阀开着时相比阀杆由园筒尚伸出。 与阀的状态无关，阀杆的位置不变。
农村经济体制改革目标和社会发展目标分别是什么？
监理企业与监理工程师的聘用合同期满后，监理企业不得无故限制监理工程师自由变更注册监理企业。
Which backup option defines a user-defined name for a backup? （） FORMAT。 NAME。 TAG。 FORMAT U%。
Which statement is true about the loss of system-critical data files in ARCHIVELOG mode？（）
