Class: 8; Unit: 9; Lesson-6(A); Paper and Wheel
Communication of ideas is at the centre of civilization. It needs written records. Most of our records in the modern
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Day: May 12, 2022
Class: 8; Unit: 9; Lesson: 5 (B); Furure Aircraft
The Falcon Hypersonic Technology Vehicle-2 (Falcon HTV-2) is the fastest plane ever built by human beings. মানুষ কর্তৃক এ যাবৎকালের
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