【简答题】本国的情况与第1题相同。外国拥有800个单位劳动。外国苹果的单位产品劳动投入是5,香蕉的单位产品劳动投入是1。 a. 画出外国的生产可能性边界。 b. 画出世界相对供给曲线。
【单选题】--I did very badly in the exam this time, so I’m very upset. ---Cheer up! I did____than you, but I remain happy.
【单选题】我国河流众多,各大江河洪涝频繁。读右图回答下列各题。 图中洪涝次数最多的地区在
【单选题】The poor boy _____ the test again; in that case, his mother will be very disappointed.