单项选择题
A．INSERT B．UPDATE C．DELETE D．CHANGE
A．NOT(X＝AND(X$ B．NOT(X$OR(X＜＞ C．NOT(X＞＝ D．NOT(X$
A．SET SYSMENU DEFAULT B．SET SYSMENU TO DEFAULT C．SET SYSMENU NOSAVE D．SET SYSMENU SAVE