这个xls有什么问题？
What's wrong with this xls?
当我用 Microsoft Excel 打开此 xls 时，出现下一条消息："The file format and extension of "proof.xls" 不匹配。文件可能已损坏或不安全。除非您信任其来源, 不要打开它。您仍然要打开它吗？"。
Microsoft Office 无论如何都会打开文档并让我将其另存为新格式，但我需要此文档可读 "on the fly"（无需使用 Excel 打开和保存文件步骤）才能加载它与 PHPExcel.
此文件来自自动网页生成器，我不知道它对 xls 的编码究竟如何。
这里是文件结构摘录（table只有第一行，不能粘贴整个文件内容）：
<?xml version="1.0" encoding="ISO-8859-1"?>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" xmlns:user="urn:my-scripts" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:html="http://www.w3.org/TR/REC-html40" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:o="urn:schemas-microsoft-com:office:office"><ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel"><WindowHeight>9345</WindowHeight><WindowWidth>15180</WindowWidth><WindowTopX>120</WindowTopX><WindowTopY>60</WindowTopY><ProtectStructure>False</ProtectStructure><ProtectWindows>False</ProtectWindows></ExcelWorkbook><ss:Styles><ss:Style ss:Name="titulo" ss:ID="titulo"><NumberFormat ss:Format="@"/><Alignment ss:WrapText="0" ss:VerticalText="0" ss:Vertical="Center" ss:ShrinkToFit="0" ss:Rotate="0.0" ss:ReadingOrder="LeftToRight" ss:Indent="0" ss:Horizontal="Center"/><ss:Interior ss:Color="Automatic" ss:PatternColor="Automatic" ss:Pattern="None"/><ss:Protection x:HideFormula="
0" ss:Protected="0"/><ss:Font x:Family="Automatic" ss:VerticalAlign="None" ss:Underline="None" ss:StrikeThrough="0" ss:Size="14.0" ss:Shadow="0" ss:Outline="0" ss:Italic="0" ss:FontName="Arial" ss:Color="Automatic" ss:Bold="1"/></ss:Style><ss:Style ss:Name="subtitulo-negrita" ss:ID="subtitulo-negrita"><NumberFormat ss:Format="@"/><Alignment ss:WrapText="0" ss:VerticalText="0" ss:Vertical="Center" ss:ShrinkToFit="0" ss:Rotate="0.0" ss:ReadingOrder="LeftToRight" ss:Indent="0" ss:Horizontal="Left"/><ss:Interior ss:Color="Automatic" ss:PatternColor="Automatic" ss:Pattern="None"/><ss:Protection x:HideFormula="0" ss:Protected="0"/><ss:Font x:Family="Automatic" ss:VerticalAlign="None" ss:Underline="None" ss:StrikeThrough="0" ss:Size="12.0" ss:Shadow="0" ss:Outline="0" ss:Italic="0" ss:FontName="Arial" ss:Color="Automatic" ss:Bold="1"/></ss:Style><ss:Style ss:Name="subtitulo" ss:ID="subtitulo"><NumberFormat ss:Format="@"/><Alignment ss:WrapText="0" ss:VerticalText="0" ss:Vertical="Center" ss:ShrinkToFit="0" ss:
Rotate="0.0" ss:ReadingOrder="LeftToRight" ss:Indent="0" ss:Horizontal="Left"/><ss:Interior ss:Color="Automatic" ss:PatternColor="Automatic" ss:Pattern="None"/><ss:Protection x:HideFormula="0" ss:Protected="0"/><ss:Font x:Family="Automatic" ss:VerticalAlign="None" ss:Underline="None" ss:StrikeThrough="0" ss:Size="12.0" ss:Shadow="0" ss:Outline="0" ss:Italic="0" ss:FontName="Arial" ss:Color="Automatic" ss:Bold="0"/></ss:Style><ss:Style ss:Name="cabecera-tabla" ss:ID="cabecera-tabla"><NumberFormat ss:Format="@"/><Alignment ss:WrapText="0" ss:VerticalText="0" ss:Vertical="Center" ss:ShrinkToFit="0" ss:Rotate="0.0" ss:ReadingOrder="LeftToRight" ss:Indent="0" ss:Horizontal="Center"/><ss:Interior ss:Color="Automatic" ss:PatternColor="Automatic" ss:Pattern="None"/><ss:Protection x:HideFormula="0" ss:Protected="0"/><ss:Font x:Family="Automatic" ss:VerticalAlign="None" ss:Underline="None" ss:StrikeThrough="0" ss:Size="11.0" ss:Shadow="0" ss:Outline="0" ss:Italic="0" ss:FontName="Arial" ss:Color="Automatic" ss:Bold="1"
/></ss:Style><ss:Style ss:Name="contenido-tabla" ss:ID="contenido-tabla"><NumberFormat ss:Format="@"/><Alignment ss:WrapText="0" ss:VerticalText="0" ss:Vertical="Center" ss:ShrinkToFit="0" ss:Rotate="0.0" ss:ReadingOrder="LeftToRight" ss:Indent="0" ss:Horizontal="Center"/><ss:Interior ss:Color="Automatic" ss:PatternColor="Automatic" ss:Pattern="None"/><ss:Protection x:HideFormula="0" ss:Protected="0"/><ss:Font x:Family="Automatic" ss:VerticalAlign="None" ss:Underline="None" ss:StrikeThrough="0" ss:Size="10.0" ss:Shadow="0" ss:Outline="0" ss:Italic="0" ss:FontName="Arial" ss:Color="Automatic" ss:Bold="0"/></ss:Style></ss:Styles><Worksheet ss:Name="ACTIVITAT OCUPACIÓ"><ss:Table ss:DefaultColumnWidth="120" x:FullRows="1" x:FullColumns="1" ss:ExpandedRowCount="64000" ss:ExpandedColumnCount="500"><Row><Cell ss:MergeDown="0" ss:MergeAcross="4" ss:StyleID="titulo"><Data ss:Type="String">LLISTAT ACTIVITAT OCUPACIÓ</Data></Cell></Row><Row><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo-negrita"><Data
ss:Type="String">Data inicial</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo"><Data ss:Type="String">01/09/2015</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo"><Data ss:Type="String"/></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo-negrita"><Data ss:Type="String">Data final</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo"><Data ss:Type="String">31/01/2016</Data></Cell></Row><Row><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo-negrita"><Data ss:Type="String">Centre gestor</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="3" ss:StyleID="subtitulo"><Data ss:Type="String">105 - Facultat de Ciències de la Comunicació</Data></Cell></Row><Row><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo-negrita"><Data ss:Type="String">Edifici/s</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="3" ss:StyleID="subtitulo"><Data ss:Type="String">Fac. Ciènc. de la Comunicació</Data></
Cell></Row><Row><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Data inicial</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Hora inicial</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Data final</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Hora final</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Total hores</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Espai</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Estudi</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Activitat</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data
ss:Type="String">Professor/Responsable</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Alumnes matriculats</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Observacions</Data></Cell></Row><Row><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">01/09/2015</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">08:30</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">01/09/2015</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">21:00</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="Number">12.5</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">I/105EM/462</Data></Cell><Cell ss:MergeDown="0"
ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String"/></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">02/09/2015</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">21:00</Data></Cell><Cell
ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="Number">12.5</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">I/105EM/462</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String"/></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">Màster DCEI</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">Chacon Garcia, Laura</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="Number">0</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String"> </Data></Cell></Row>
</ss:Table><WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel"><PageSetup><Header x:Margin="0"/><Footer x:Margin="0"/><PageMargins x:Top="0.984251969" x:Right="0.78740157499999996" x:Left="0.78740157499999996" x:Bottom="0.984251969"/></PageSetup><Selected/><FreezePanes/><FrozenNoSplit/><SplitHorizontal>5</SplitHorizontal><TopRowBottomPane>5</TopRowBottomPane><ActivePane>2</ActivePane><Panes><Pane><Number>3</Number></Pane><Pane><Number>2</Number><ActiveRow>4</ActiveRow><ActiveCol>2</ActiveCol></Pane></Panes><ProtectObjects>False</ProtectObjects><ProtectScenarios>False</ProtectScenarios></WorksheetOptions></Worksheet></Workbook>
那是因为它不是 .xls 文件
.xls 文件是一种名为 BIFF 的二进制格式，在 OLE2 包装器中。
您部分发布的文件是 SpreadSheetML 格式文件，一种 Excel 2003 年引入的 XML 格式，但从未证明特别流行，并且后来被 OfficeOpenXML (.xlsx) 格式取代。
这是一种有效的电子表格格式，MS Excel 完全可以阅读，但它不是 BIFF 格式，因此有人抱怨扩展名与格式不匹配。
将扩展名更改为.xml，然后在MS中阅读Excel。
当我用 Microsoft Excel 打开此 xls 时，出现下一条消息："The file format and extension of "proof.xls" 不匹配。文件可能已损坏或不安全。除非您信任其来源, 不要打开它。您仍然要打开它吗？"。
Microsoft Office 无论如何都会打开文档并让我将其另存为新格式，但我需要此文档可读 "on the fly"（无需使用 Excel 打开和保存文件步骤）才能加载它与 PHPExcel.
此文件来自自动网页生成器，我不知道它对 xls 的编码究竟如何。
这里是文件结构摘录（table只有第一行，不能粘贴整个文件内容）：
<?xml version="1.0" encoding="ISO-8859-1"?>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" xmlns:user="urn:my-scripts" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:html="http://www.w3.org/TR/REC-html40" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:o="urn:schemas-microsoft-com:office:office"><ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel"><WindowHeight>9345</WindowHeight><WindowWidth>15180</WindowWidth><WindowTopX>120</WindowTopX><WindowTopY>60</WindowTopY><ProtectStructure>False</ProtectStructure><ProtectWindows>False</ProtectWindows></ExcelWorkbook><ss:Styles><ss:Style ss:Name="titulo" ss:ID="titulo"><NumberFormat ss:Format="@"/><Alignment ss:WrapText="0" ss:VerticalText="0" ss:Vertical="Center" ss:ShrinkToFit="0" ss:Rotate="0.0" ss:ReadingOrder="LeftToRight" ss:Indent="0" ss:Horizontal="Center"/><ss:Interior ss:Color="Automatic" ss:PatternColor="Automatic" ss:Pattern="None"/><ss:Protection x:HideFormula="
0" ss:Protected="0"/><ss:Font x:Family="Automatic" ss:VerticalAlign="None" ss:Underline="None" ss:StrikeThrough="0" ss:Size="14.0" ss:Shadow="0" ss:Outline="0" ss:Italic="0" ss:FontName="Arial" ss:Color="Automatic" ss:Bold="1"/></ss:Style><ss:Style ss:Name="subtitulo-negrita" ss:ID="subtitulo-negrita"><NumberFormat ss:Format="@"/><Alignment ss:WrapText="0" ss:VerticalText="0" ss:Vertical="Center" ss:ShrinkToFit="0" ss:Rotate="0.0" ss:ReadingOrder="LeftToRight" ss:Indent="0" ss:Horizontal="Left"/><ss:Interior ss:Color="Automatic" ss:PatternColor="Automatic" ss:Pattern="None"/><ss:Protection x:HideFormula="0" ss:Protected="0"/><ss:Font x:Family="Automatic" ss:VerticalAlign="None" ss:Underline="None" ss:StrikeThrough="0" ss:Size="12.0" ss:Shadow="0" ss:Outline="0" ss:Italic="0" ss:FontName="Arial" ss:Color="Automatic" ss:Bold="1"/></ss:Style><ss:Style ss:Name="subtitulo" ss:ID="subtitulo"><NumberFormat ss:Format="@"/><Alignment ss:WrapText="0" ss:VerticalText="0" ss:Vertical="Center" ss:ShrinkToFit="0" ss:
Rotate="0.0" ss:ReadingOrder="LeftToRight" ss:Indent="0" ss:Horizontal="Left"/><ss:Interior ss:Color="Automatic" ss:PatternColor="Automatic" ss:Pattern="None"/><ss:Protection x:HideFormula="0" ss:Protected="0"/><ss:Font x:Family="Automatic" ss:VerticalAlign="None" ss:Underline="None" ss:StrikeThrough="0" ss:Size="12.0" ss:Shadow="0" ss:Outline="0" ss:Italic="0" ss:FontName="Arial" ss:Color="Automatic" ss:Bold="0"/></ss:Style><ss:Style ss:Name="cabecera-tabla" ss:ID="cabecera-tabla"><NumberFormat ss:Format="@"/><Alignment ss:WrapText="0" ss:VerticalText="0" ss:Vertical="Center" ss:ShrinkToFit="0" ss:Rotate="0.0" ss:ReadingOrder="LeftToRight" ss:Indent="0" ss:Horizontal="Center"/><ss:Interior ss:Color="Automatic" ss:PatternColor="Automatic" ss:Pattern="None"/><ss:Protection x:HideFormula="0" ss:Protected="0"/><ss:Font x:Family="Automatic" ss:VerticalAlign="None" ss:Underline="None" ss:StrikeThrough="0" ss:Size="11.0" ss:Shadow="0" ss:Outline="0" ss:Italic="0" ss:FontName="Arial" ss:Color="Automatic" ss:Bold="1"
/></ss:Style><ss:Style ss:Name="contenido-tabla" ss:ID="contenido-tabla"><NumberFormat ss:Format="@"/><Alignment ss:WrapText="0" ss:VerticalText="0" ss:Vertical="Center" ss:ShrinkToFit="0" ss:Rotate="0.0" ss:ReadingOrder="LeftToRight" ss:Indent="0" ss:Horizontal="Center"/><ss:Interior ss:Color="Automatic" ss:PatternColor="Automatic" ss:Pattern="None"/><ss:Protection x:HideFormula="0" ss:Protected="0"/><ss:Font x:Family="Automatic" ss:VerticalAlign="None" ss:Underline="None" ss:StrikeThrough="0" ss:Size="10.0" ss:Shadow="0" ss:Outline="0" ss:Italic="0" ss:FontName="Arial" ss:Color="Automatic" ss:Bold="0"/></ss:Style></ss:Styles><Worksheet ss:Name="ACTIVITAT OCUPACIÓ"><ss:Table ss:DefaultColumnWidth="120" x:FullRows="1" x:FullColumns="1" ss:ExpandedRowCount="64000" ss:ExpandedColumnCount="500"><Row><Cell ss:MergeDown="0" ss:MergeAcross="4" ss:StyleID="titulo"><Data ss:Type="String">LLISTAT ACTIVITAT OCUPACIÓ</Data></Cell></Row><Row><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo-negrita"><Data
ss:Type="String">Data inicial</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo"><Data ss:Type="String">01/09/2015</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo"><Data ss:Type="String"/></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo-negrita"><Data ss:Type="String">Data final</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo"><Data ss:Type="String">31/01/2016</Data></Cell></Row><Row><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo-negrita"><Data ss:Type="String">Centre gestor</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="3" ss:StyleID="subtitulo"><Data ss:Type="String">105 - Facultat de Ciències de la Comunicació</Data></Cell></Row><Row><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="subtitulo-negrita"><Data ss:Type="String">Edifici/s</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="3" ss:StyleID="subtitulo"><Data ss:Type="String">Fac. Ciènc. de la Comunicació</Data></
Cell></Row><Row><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Data inicial</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Hora inicial</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Data final</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Hora final</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Total hores</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Espai</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Estudi</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Activitat</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data
ss:Type="String">Professor/Responsable</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Alumnes matriculats</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="cabecera-tabla"><Data ss:Type="String">Observacions</Data></Cell></Row><Row><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">01/09/2015</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">08:30</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">01/09/2015</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">21:00</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="Number">12.5</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">I/105EM/462</Data></Cell><Cell ss:MergeDown="0"
ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String"/></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">02/09/2015</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">21:00</Data></Cell><Cell
ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="Number">12.5</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">I/105EM/462</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String"/></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">Màster DCEI</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String">Chacon Garcia, Laura</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="Number">0</Data></Cell><Cell ss:MergeDown="0" ss:MergeAcross="0" ss:StyleID="contenido-tabla"><Data ss:Type="String"> </Data></Cell></Row>
</ss:Table><WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel"><PageSetup><Header x:Margin="0"/><Footer x:Margin="0"/><PageMargins x:Top="0.984251969" x:Right="0.78740157499999996" x:Left="0.78740157499999996" x:Bottom="0.984251969"/></PageSetup><Selected/><FreezePanes/><FrozenNoSplit/><SplitHorizontal>5</SplitHorizontal><TopRowBottomPane>5</TopRowBottomPane><ActivePane>2</ActivePane><Panes><Pane><Number>3</Number></Pane><Pane><Number>2</Number><ActiveRow>4</ActiveRow><ActiveCol>2</ActiveCol></Pane></Panes><ProtectObjects>False</ProtectObjects><ProtectScenarios>False</ProtectScenarios></WorksheetOptions></Worksheet></Workbook>
那是因为它不是 .xls 文件
.xls 文件是一种名为 BIFF 的二进制格式，在 OLE2 包装器中。
您部分发布的文件是 SpreadSheetML 格式文件，一种 Excel 2003 年引入的 XML 格式，但从未证明特别流行，并且后来被 OfficeOpenXML (.xlsx) 格式取代。
这是一种有效的电子表格格式，MS Excel 完全可以阅读，但它不是 BIFF 格式，因此有人抱怨扩展名与格式不匹配。
将扩展名更改为.xml，然后在MS中阅读Excel。