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hydrogenspektret
作者：
Jens C Hansen
Emissionslinjer fra hydrogen.
GeoGebra
Jens C Hansen
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רישום חופשי
Exploring GeoGebra for the First Time
Triangle with 3 Right Angles
Pitfalls of Disk/Washer Method
apec
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Tabitha Medina -Square
Sang Lee Derivative
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