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Portable Network Graphic  |  1991-11-09  |  3KB  |  512x342  |  4-bit (4 colors)
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OCR: Click on the best answer 2 TI bonds 118 3 CH 1 "C, HA Need a triple bond or 2 double bonds C FC ,H4 in molecule 12 None of these 15 13 14 (allow 4 seconds to reset after wrong answers)