单项选择题
A.AutoCenter B.AlwaysOnTop C.ShowCenter D.FormCenter
A.Init B.Release C.Destroy D.Caption
A.DELETE TABLE order WHERE签订日期<{^2002-1-1} B.DELETE TABLE order WHILE签订日期>{^2002-1-1} C.DELETE FROM order WHERE签订日期<{^2002-1-1} D.DELETE FROM order WHILE签订日期>{^2002-1-1}.