单项选择题
A．ALTER TABLE B．KILL TABLE C．DELETE TABLE D．DROP TABLE
A．Sub Proc(x as Integer, y as Intege B．Sub Proc(By Val x as Integer, y as Intege C．Sub Proc(x as Integer, By Val y as Intege D．Sub Proc(By Val x as Integer, By Val y as Intege
A．Enter B．Exit C．GotFocus D．LostFocus