The two callers in the first phone call don’t know each other.（）

A . Using DELETE statements, for example, DELETE FROM performance_schema.events_watis_current B . Using the statement RESET PERFORMANCE CACHE C . Using the statement FLUSH PERFORMANCE CACHE D . Using TRUNCATE statements, for example, TRUNATE TABLE performance_schema.events_waits_current E . Disabling and re-enabling all instruments F . Restarting Mysql

A . stored scripts in the recovery catalog. B . backups that can be deleted from disk. C . backup sets and image copies are obsolete. D . backups that do not have the AVAILABLE status in the RMAN repository.

A . Running a query on a table returns "ORA-600： Internal Error." B . Inserting a value in a table returns "ORA-01722： invalid number." C . Creating a table returns "ORA-00955： name is already used by an existing object." D . Inserting a value in a table returns "ORA-00001： unique constraint （SYS.PK_TECHP） violated."  E . Inserting a row in a table returns "ORA-00060： deadlock detected while waiting for resource.&quot

A . that had been driven B . had been driven C . have been driven D . which to have been drive

A . Busy   B . Invalid   C . Successful   D . Unsuccessfu

A . The coach had to be replaced． B . The coach driver felt sick． C . The hotel rooms were full． D . The hotel had to be cleaned．

A . the raising of the standards of teaching and the reform in curriculum B . the raising of the standards of teaching and learning and the restructuring of the schools C . the raising of the standards of teaching and the improvement of the standards of learning D . None of the above

A . A role can be granted to itself. B . Roles are owned by the SYS user. C . Roles can be granted to other roles. D . A role cannot be assigned external authentication. E . A role can contain both system and object privileges.

A . impartial neutrality　 B . partial neutrality C . firm support of the Allies　 D . Pro-Ally partial neutrality

A、National Library of Canada B、British Library C、Library of Congress D、Library of Russian Academy of Science

A．Homework and quizzes. B．Quizzes and the final exam. C．Class participation and the midterm exam. D．Homework and class participation.

A．the improvement depends on the layoffs in 2008. B．the positive news only comes from a few firms. C．there will be more layoffs in 2009. D．many big firms have cut down their earnings.

Economy () and environment protecting are two main issues in the world. In these two aspects, many () counties like the USA also have the same problems as countries. (develop)

A．Generate revenue B．Develop key assumptions C．Building and integrating the three statements D．Predict expenditures 此题为多项选择题。

A．expect B．have C．lose D．exercise

A．the Republican Party and the Liberal Party B．The Democratic Party and the Liberal Party C．The Liberal Party and the Labour Party D．The Democratic Party and the Republican Party

是 否