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【单选题】
以下关于液体质点和液体的正确论述是A.
液体比液体质点大；
B.
液体包含有很多液体质点；
C.
液体质点没有大小，没有质量；
D.
液体质点又称为液体。
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皮皮学刷刷变学霸
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【简答题】你的国家有什么食物是别的地方吃不到的?请介绍一个用它做的菜。(最少200个字,请用课文里学过的词和语法,用得越多越好。 )
【单选题】If the marginal cost of producing the next unit of output exceeds the average total cost, then:
A.
the average total cost curve is increasing.
B.
the marginal cost curve is at its minimum.
C.
the average total cost curve is decreasing.
D.
the average total cost curve is at its minimum.
【单选题】Average total cost (ATC) is calculated as follows:
A.
a. ATC = (change in total cost)/(change in quantity of output).
B.
b. ATC = (change in total cost)/(change in quantity of input).
C.
c. ATC = total cost/quantity of output.
D.
d. ATC = total cost/quantity of input.
【单选题】Whenever marginal cost is greater than average total cost,
A.
a. marginal cost is rising.
B.
b. marginal cost is falling.
C.
c. average total cost is rising.
D.
d. average total cost is falling.
【单选题】If an increase in output results in a decrease in average total cost, the corresponding marginal cost is:
A.
. less than average total cost.
B.
. greater than average total cost.
C.
. equal to average total cost.
D.
. negative.
【单选题】If marginal cost is less than average total cost, then ________ is ________.
A.
average total cost; falling
B.
average variable cost; falling
C.
marginal cost; falling
D.
marginal cost; rising
【简答题】环节动物的血液呈红色，是因为血细胞中含有血红蛋白。()
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