依据本单元所学,以下叙述何者正确？（答错之选项有扣分）（）
A. Paul Samuelson是美国籍第一位获诺贝尔经济学奖者
B. 无异曲线必凸向原点
C. 本单元老师解说中提过德国.日本与法国
D. 无异曲线只可能是负斜率
E. bad有可能边际效用递增
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下列哪个是Java应用程序主类中正确的main方法（）
A. static void main （String args[ ]）
B. public void main （String args[ ]）
C. public static void main （String args[ ]）
D. public static void Main （String args[]）
Hans has 27 dollars, which he decides to spend on x and y. Commodity x costs $16 per unit and commodity y costs $10 per unit. He has the utility function U （x, y）=5×2 + 2y2 and he can purchase fr
A. Hans will choose only x
B. Hans will choose only y
C. Hans will chose some of each commodity, but more y than x
D. Hans will choose some of each commodity, but more x than y
The demand curve shows（）
A. how much people would like to pay at the reserve prices
B. how much firms would like to sell at each prices
C. how much market would like to trade
Which of the following speech is not a ceremonial speech（）
An introduction
B. A commencement address
C. A commemorative speech
D. A eulogy
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