In a “first-best” world:
举一反三
- 中国大学MOOC: In a “first-best” world:
- The event took place during() A: First World War B: the First World War C: World War the One D: the World War One
- Zhang Heng invented the world’s first water-powered armillary sphere and the world’s first seismometer.
- In a “first-best” world：（ ） A: Free trade is not optimal. B: Free trade is economically efficient. C: Free trade benefits everyone. D: Free trade harms everyone.
- 亚马逊的收款方式有（） A: 美国银行卡、World First、payoneer B: 美国银行卡、World First、Paypal C: World First、payoneer、Paypal D: 美国银行卡、Paypal、国际支付宝