A increase B drop C lift D realize

B．Venezuela will increase its production．

C．If Venezuela increases its production, then oil prices will drop．

D．Only if Venezuela increases its production will oil prices drop．

E．Either Venezuela will not increase its production, or oil prices will not drop．

F．If Venezuela does not increase production, then oil prices will drop．

A、DROP TABLE

B、TRUNCATE TABLE

C、DELETE

D、CLEAR

A、ruined

B、disgusting

C、bursted

D、knotted

A、DROP INDEX命令不能删除主键。

B、DROP INDEX命令不能删除UNIQUE索引。

C、DROP INDEX命令不能删除系统表中的索引。

D、DROP INDEX命令不能删除非聚集索引。

A. technology B. cultural background C. environment D. the desire to be healthy

A. Which B. When C. What D. As

AB C

Alexander Graham Bell devoted his life to help the deaf.

D