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  aldrin  

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by aldrin
3-11-10
One day the littlegirl meet the old man along the road.Then the little girl asked.
Sir?
Yes my dear?
......
Do you know what colloid is?
Yes colloid is a type of homogeneousmixture in which the dispersed particles do not settle
Where can we find it?
Actually we use it in our daily life.
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