【单选题】Samara's income is $30 a month and she spends all of it on music downloads and gasoline. The price of a music download is $3 and the price of a gallon of gasoline is $3. At Samara's best affordable po...
A.
0.50.5
B.
11
C.
1.51.5
D.
More information is needed to determine the marginal rate of substitution.需要更多的信息来确定边际替代率。
【简答题】The following expression is to express the emotion of anger in daily life, could you translate them into Chinese? I just can ’ t stand you. You wanna get off my back. I ’ m about to explode. I wish I ...