Bootstrap三个相等列

<!DOCTYPE html>
<html>
   <head>
      <title>Bootstrap Example</title>
      <link href = /bootstrap/css/bootstrap.min.css rel = stylesheet>
      <script src = /scripts/jquery.min.js></script>
      <script src = /bootstrap/js/bootstrap.min.js></script>
   </head>
   <body>
      <div class = container-fluid>
         <h2>Bootstrap Grid</h2>
         <div class = row>
            <div class = col-sm-4 style = background-color:green; color: white;>Column One</div>
            <div class = col-sm-4 style = background-color:orange; color: white;>Column Two</div>
            <div class = col-sm-4 style = background-color:gray; color: white;>Column Three</div>
         </div>
      </div>
   </body>
</html>

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