单项选择题
A. Coins, stamps and sports. B. Stamps, sports and postcards. C. Coins, stamps and postcards. D. Coins, sports and postcards.
A、The census method. B、 Population explosion. C、 Rome’s population size. D、 The extension of citizenship to Roman allies.
A. the importance of predicting earthquakes B. a new method to predict earthquakes C. the great damages caused by earthquakes D. a traditional method to predict earthquakes