阿摩線上測驗
7. ______ are often substances that come out of the earth such as crude oil, coal, aluminum, copper, gold, silver,salt,sugar,rice,wheat,and maintain roughly a universal price,fluctuated daily and based on global supply and demand.
(A) Epidemic
(B) Commodities
(C) Abundance
(D) Diversities
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統計： A(0), B(3), C(1), D(1), E(0) #3384746
統計： A(0), B(3), C(1), D(1), E(0) #3384746
