1) Smartphones contain more than 60 minerals that are obtained from mines. a) Yes. b) No. 2) Habitat destruction is one of the main issues of mining activity. a) Yes. b) No. 3) 63% of gold is used in jewelry, 21 % in coins, 15% per cent in industrial uses including electronics; and 1 % in dental. a) Yes. b) No. 4) Gold was one of the first metals to be discovered. a) Yes. b) No. 5) The world's biggest open-pit mine is currently in Argentina. a) Yes. b) No, it´s in Utah. 6) Argentina doesn't produce more than 10 tons of gold per year. a) Yes. b) No, it produces 55 tons a year.

Mining

印刷
埋め込み

リーダーボード

表示スタイル

オプション

テンプレートを切り替える

自動保存: を復元しますか?