Inventions Practice Tests
Inventions Online Tests
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The MCQ: Negative photograph was discovered in; "Negative photograph" App Download (Free) with answers germany, england, france and u.k for online elementary school classes. Solve inventions and inventors quiz questions, download Google eBook (Free Sample) for online courses.
MCQ 1: Negative photograph was discovered in
MCQ 2: In which one of the following year, negative photograph was patented?
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