非竞争性拮抗剂的特点是（） 与受体结合非常牢固。 使激动药量效曲线降低。 提高激动剂浓度可以对抗其作用。 双倒数作图法可以显示其特性。 具有激动药与拮抗药两重特性。
You work as a database administrator for Certkiller .com. In your database server， the parameter PLSQL_OPTIMIZE_LEVEL has been set to 2. What would this setting achieve？（） It degrades the run time and compiler performance.。 It provides better run time and compiler performance.。 It provides better optimization of the statement during parse time.。 It forces the rule based optimizer to be used for statement optimization.。 It provides better run time performance but slightly degraded compiler performance. 。 It provides better run time performance but slightly degraded run time performance.。
在人为条件下，用溶菌酶除尽革兰氏阳性菌原有细胞壁后所得到的仅有一层细胞膜包裹着的圆球状渗透敏感细胞称为（）。
You are using an Automatic Storage Management （ASM） instance to manage the files of your production database. You have two disk groups， DG1and DG2with one device each. In the parameter file of the production database， the following parameters have been specified： DB_CREATE_ONLINE_LOG_DEST_1 = ’+dg1’ DB_CREATE_ONLINE_LOG_DEST_2 = ’+dg2’ What would be the impact of this setting？（） When a new log group is added， it would have one member in each disk group.。 When a new log group is added， it would have two members in each disk group.。 When a new tablespace is added， it would have one data file in each disk group.。 When a new log file is added， it would have one member spread across the disk groups.。
在下列犯罪构成的一般要件中，提示犯罪实质特征的要件是（） 犯罪客体。 犯罪客观方面。 犯罪主体。 犯罪主观方面。
Your multitenant container database (CDB) is running in ARCHIVELOG mode. You connect to the CDB RMAN.
Examine the following command and its output:
You execute the following command:
RMAN > BACKUP DATABASE PLUS ARCHIVELOG;
Which data files will be backed up?（）
