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what is quantum mechanics or quantum physics

What is student fight(unrest), cause and remedy of it. download below(in bengali) student_bengali-unrest_www.ppt3113.g...

What is human population and its impact (short note on india population, us population and population of south africa) ...

what is poverty,cause of poverty,types of poverty and effects of poverty ? download below(bengali) poverty_bengali-www.ppt31...