'Organic biological' diaporamas de présentation

In everyday life, we attempt to achieve as much speed as possible.

In everyday life, we attempt to achieve as much speed as possible. Stairs. V.S. Elevator/ Lift. Hand Wash. V.S. Washing Machine. Knife. V.S. Blender. Things that speed things up. Chemical Reactions. A. B. C. D. X. Z. Y. So what are those that speed up the reaction called?.

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