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【单选题】
| 关于标识符，下列选项中描述错误的是（）。A.
标识符只能由字母、数字和下划线组成
B.
标识符不能以下划线作为第一个字符
C.
标识符不能以数字作为第一个字符
D.
标识符不区分大小写字母
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【单选题】Lisa spends all her income on pizzas and DVDs. The above table shows Lisa's marginal utility for pizza and marginal utility for DVDs. If the price of a pizza is $10, the price of a DVD is $5, and Lisa...
A.
6 DVDs and 1 pizza
B.
4 DVDs and 2 pizzas
C.
2 DVDs and 3 pizzas
D.
5 DVDs and 4 pizzas
【单选题】If output is produced according to Q = 4LK, the price of K is $10, and the price of L is$10, then the cost minimizing combination of K and L capable of producing 16 units of output is
A.
L = 4 and K = 1
B.
L = 2 and K = 2
C.
L = 1 and K = 1
D.
L = 8 and K = 8
【单选题】Joseph chooses a combination of apples and oranges along his budget line. The marginal rate of substitution of apples for oranges is 2, the price of an apple is $0.50, and the price of an orange is $1...
A.
is maximizing total utility.
B.
should consume more apples and fewer oranges to maximize total utility.
C.
should consume fewer apples and more oranges to maximize total utility.
D.
may or may not be maximizing total utility.
【简答题】国际化标准组织ISO在1984年正式颁布了 ,使计算机网络体系结构了标准化。
【单选题】Joseph chooses a combination of apples and oranges along his budget line. The marginal rate of substitution of apples for oranges is 2, the price of an apple is $0.50, and the price of an orange is $0...
A.
is maximizing total utility.
B.
should consume more apples and fewer oranges to maximize total utility.
C.
should consume fewer apples and more oranges to maximize total utility.
D.
may or may not be maximizing total utility.
【单选题】The price of Y is $10. According to the above figure, if the price of X is $5, what combination of X and Y will a utility-maximizing consumer choose?
A.
80 X , 20 Y
B.
120 X , 620 Y
C.
120 X , 250 Y
D.
200 X , 620 Y
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