Тест 3

The modern pencil19пропуск 19, текущийin 1795 by Nicholas-Jacques Conte, a scientist serving in the army of Napoleon Bonaparte. The magic material that was so appropriate for the purpose was the form of pure carbon that we call graphite. It was first discovered in Europe, in Bavaria at the start of the20пропуск 20century; although the Aztecs21пропуск 21it as a marker several hundred years earlier.