জ্যামিতির – সূত্রাবলী Geometry Formulas .(1) মাত্রা— দৈর্ঘ্য, প্রস্থ ও উচ্চতা বা বেধকে মাত্রা বলে। (2) বিন্দু...
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. . . . . . . . CELL- THE BASIC UNIT OF LIFE. . . ....
. . AMINES Indtroduction . Amines are the derivatives of ammonia prepared by the replacement of one,...
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