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the length of the rope to the appropriate size. experience of mathematics and the life relation

Title: the length of the rope to the appropriate size. experience of mathematics and the life relation
URL: http://www.brazilbuttdvdpackage.com/
Description: keeping a distance of 30 cm stood on one leg to the back half a step. then, single shake series the mudskipper show their teacher: 1 organize students skipping 2. jumping, there are few injury, rope swinging forward swing, vehicle deceleration