Отметьте правильный
ответ The word Underground Mining means:

  • Any mineral that can be burned to produce energy.
  • Method of mining used to recover deep mineral deposits.
  • Method of mining using a large hole that is dug to extract ore
    found near the Earth's surface.
  • Rock that contains enough valuable minerals to make mining
    profitable.
Для просмотра статистики ответов нужно войти.