浇筑式沥青混凝土施工过程中，对混合料拌和后出料温度、运输温度及摊铺温度的要求是（）。 A.220～250℃ 。 B.290～330℃ 。 C.120～180℃ 。 D.160～200℃。
半耐荫类
ROW-based replication has stopped working. You investigate the error log file and find the following entries: 2013-08-27 14:15:47 9056 [ERROR] Slave SQL: Could not execute Delete_rows event on table test.t1; Can't find record in 't1', Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND; the event's master log 56_master-bin. 000003, end_log_pos 851, Error_code: 1032 2013-08-27 14:15:47 9056 [warning] Slave: Can't find record in 't1' Error_code: 1032 2013-08-27 14:15:47 9056 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log '56_masterbin. 000003' position 684 Why did you receive this error?（） The slave SQL thread does not have DELETE privileges to execute on test.t1 table.s。 The table definition on the slave -litters from the master。 Multi-threaded replication slaves can have temporary errors occurring for cross database updates。 The slave SQL thread attempted to remove a row from the test.t1 table, but the row did not exist。
You have only two redo log groups and these groups get overwritten several times in a day. Your database operates in NOARCHIVELOG mode and user-managed consistent backups are performed every Sunday night. On Thursday morning， you find that an important table has been dropped and purged. With reference to this scenario， up to what point in time can the data be recovered？（） until Thursday morning。 until that point in time when the database is opened。 until that point in time when the recovery is performed。 until last Sunday’s backup。 until that point in time when the table is dropped and purged。 until Wednesday evening。
电泵井变压器的检查周期（） 一周。 一个月。 一季度。
Which are the prerequisites for performing flashback transactions on your database？（）
