Which code， inserted at line 16， correctly retrieves a local instance of a Point object？（） Point p = Line.getPoint（）；。 Line.Point p = Line.getPoint（）；。 Point p = （new Line（））.getPoint（）；。 Line.Point p = （new Line（））.getPoint（）；。
竞争性拮抗剂具有下列特点（） 使激动药量效曲线平行右移。 使激动剂的最大效应降低。 竞争性拮抗作用是可逆的。 拮抗参数pA2越大，拮抗作用越强。 与受体有高度亲和力，无内在活性。
Your database operates in ARCHIVELOG mode. User-managed consistent backups are performed every Sunday night. On Tuesday， client A drops a table at 8：00 a.m. as follows： SQL> DROP TABLE cust_ord PURGE； Table dropped. Client B executes a query at 9：00 a.m. on the same table as follows： SQL> SELECT * FROM cust_ord； SELECT * FROM cust_ord *ERROR at line 1：ORA-00942： table or view does not exist Client B needs the dropped table and reports the problem to you.With reference to this scenario， which action should you take？（） retrieve the table by using the flashback feature。 restore all the data files from last Sunday’s backup and then perform a time-based recovery。 restore all the data files from last Sunday’s backup and then perform a log sequence recovery。 restore all the data files from last Sunday’s backup and then perform a cancel-based recovery。 restore from last Sunday’s backup only data files that belong to the tablespace in which the table was stored and then perform a complete recovery。
液化气装车和轻油装车时必须（） 接防静电接地线。 不必接防静电接地线。
与闻一多《死水》可谓异曲同工的当代诗歌是（）。 《结结巴巴》。 《车过黄河》。 《独白》。 《帕斯捷尔纳克》。
室内机背部靠墙，需做好防震加固，室内机安装应考虑（）
