【简答题】Over 1 Europeans began changing
their old currencies for the euro. Altogether 2
banknotes and 3 coins — worth 4 euros or
5 U.S. dollars — have been produced for the switchover.
【判断题】Beads, stones, seashells, paper, precious metals such as gold and silver, base metals such as iron have
all been used as money. Today, money is printed on paper. A lot of countries use their own cur...