【多选题】关于IOC的理解,下面说法正确的是()。[选两项]
【多选题】Which countries use their amrs freely?
【单选题】Which countries use English as their mother tongue?
【单选题】In which countries did people use copper to make their money? ______
B.
Philippine Islands and China.
【多选题】下面关于IOC的理解,正确的是( )(选择两项)。