📁 数学
Math or mathematics is the study of numbers and variables representing numbers to solve everyday problems, learn about the world around us or to be an exercise in logical reasoning. Some applications of math are in the areas of finance, physics, sociology, computer programming, fractal music and geometric art.
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Thomas Jefferson: A Resource Guide
http://www.loc.gov/rr/program/bib/presidents/jefferson/
ThoughtCo - Why Students Cheat and How to Stop It
https://www.thoughtco.com/cheating-basics-for-private-schools-2773348