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GMU:DIY Biolab “Driver’s License”/Yang Li (view source)
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[[File:4581516359845_.pic_hd.jpg|400px]] | [[File:4581516359845_.pic_hd.jpg|400px]] | ||
However, when I change another kind of coffee and do the experiment in the same way, the colour cannot be seen obviously. | |||
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==References== | ==References== | ||