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ONA
5 d’ag. 2012
Acidesa i alcalinitat
Dos videos que val la pena veure i llavors reflexionar.
<iframe width="560" height="315" src="http://www.youtube.com/embed/2VyPEwIjwgA" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="http://www.youtube.com/embed/A9CAa5p0SxQ" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="http://www.youtube.com/embed/2VyPEwIjwgA" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="http://www.youtube.com/embed/A9CAa5p0SxQ" frameborder="0" allowfullscreen></iframe>
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