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Hyper Stacks 1994 May
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Hyper Stacks (Pacific HiTech)(1994)[Mac].iso
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Science
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Chemistry
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Bonding
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Portable Network Graphic
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1991-11-09
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4-bit (4 colors)
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Click on the best answer 19 2 18 3 Do not exceed 8 Mg:S: electrons in valence shell 12 15 13 14 (allow 4 seconds to reset after wrong answers)