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Geography, 23.06.2019 00:10
Simple astronomical telescope the objective lens has a focal length of 75 cm and that of a piece of 5cm of the lenses are 18 cm apart when will be final image of a distant object before
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Geography, 23.06.2019 19:00
Hurry on the map above, arrow 1 points to a region where most people are
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Was the brain is the brain lolololololololol...
Mathematics, 18.07.2020 01:01
Mathematics, 18.07.2020 01:01
Mathematics, 18.07.2020 01:01