赵先生，45岁。患“冠心病”18年，住院期间突然神志丧失，呼吸不规则，即刻进行心肺复苏。心脏按压的深度是（） 1—3cm。 4—5cm。 5—6cm。 6—7cm。 7—scm。
内径百分表可以用来测量孔径和孔的（）误差。
You are maintaining the SALES database for an organization. You have enabled the Flashback Database feature and want to estimate the flashback space required for future operations. Which view would you query to estimate the flashback space required？（） V$DATABASE。 V$FLASHBACK_DATABASE_STAT。 V$FLASHBACK_DATABASE_LOG。 V$RECOVERY_FILE_DEST。
高粘度并含有固体粒子的液体最为适用的泵是：（） 离心泵。 往复泵。 球心泵。 螺杆泵。
Your database is open and the LISTENER listener is running. The new DBA of the system stops thelistener by using the command： LSNRCTL> STOP What happens to the sessions that are presently connected to the database instance（） The sessions are able to perform only queries.。 The sessions are not affected and continue to function normally.。 The sessions are terminated and the active transactions are rolled back.。 The sessions are not allowed to perform any operations till the listener is started.。
下列不是构成为确定幼儿园管理原则的依据的是（）
