//.....................................................................
        /// <summary>
        /// 公式中名称是正文样式,没有斜体
        /// </summary>
        /// <param name="mathlin"></param>
        /// <returns></returns>
        public static M.Run MakeMathRun(string mathlin, bool plainstyle = false)
        {
            //M.Style fontstyle = new M.Style( ) { Val = M.StyleValues.Plain };
            //RunFonts fonts = new RunFonts( ) { Ascii = "Cambria Math", HighAnsi = "Cambria Math" };

            RunProperties properties = new RunProperties( );

            properties.Append(OpenDocxMathExprs.MakeMathFont( ));

            if (plainstyle)
            {
                properties.Append(OpenDocxMathExprs.MakeMathFonStyle( ));
            }

            //---------------------------------------------
            M.Text mathtext = new M.Text( );
            mathtext.Text = mathlin;

            //---------------------------------------------
            M.Run mathrun = new M.Run( );
            mathrun.Append(properties);
            mathrun.Append(mathtext);

            return(mathrun);
        }
        //.....................................................................
        /// <summary>
        ///
        /// </summary>
        /// <param name="useItalic"></param>
        /// <returns></returns>
        public static M.ControlProperties MakeControlProperties(bool useItalic = false)
        {
            RunProperties propertiesRUN = new RunProperties( );

            propertiesRUN.Append(OpenDocxMathExprs.MakeMathFont());

            if (useItalic)
            {
                propertiesRUN.Append(OpenDocxMathExprs.MakeMathFontItalic());
            }

            //---------------------------------------------
            M.ControlProperties propertiesCTRL = new M.ControlProperties( );

            propertiesCTRL.Append(propertiesRUN);

            return(propertiesCTRL);
        }