Our dear beloved Laji sir.......🙏🙏🙏🙏🙏😞😞😞
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The ozone layer is a natural layer of gas in the upper atmosphere that protects humans and other living things from harmful ultraviolet (UV... -
“One scientific invention can change the world forever!!” Inventions include things like- the steam engine, printing press, the computer,... -
Cognitive map on the topic Work Power Energy The other one is on thr topic The d and f block elements
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