Main points of the text 1.A tariff is a tax levied by a government on goods and service 2.The tariff provides the government with extra tax revenue 制价爱行蜀易大考Main points of the text Main points of the text 1.A tariff is a tax levied by a A tariff is a tax levied by a government on goods and service government on goods and service 2.The tariff provides the The tariff provides the government with extra tax government with extra tax revenue revenue A