【单选题】When can two countries gain from trading two goods?
A.
when the first country can only produce the first good and the second country can only produce the second good
B.
when the first country can produce both goods, but can only produce the second good at great cost, and the second country can produce both goods, but can only produce the first good at great cost
C.
when the first country is better at producing both goods and the second country is worse at producing both goods
D.
Two countries could gain from trading two goods under all of the above conditions.
【单选题】If the cross-price elasticity of two goods is positive, then those two goods are_________.
【简答题】设y=(e x +log 3 x)arcsinx,求y'.
【单选题】封闭式基金至少每周公告( )次资产净值和份额净值。
【简答题】封闭式基金至少每周公告( )次资产净值和份额净值
【单选题】某典型环节的传递函数是 则该环节是( )
【单选题】封闭式基金至少每周公告( )资产净值和份额净值。
【单选题】If the cross-price elasticity of two goods is negative, then those two goods are_________