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【单选题】
在三相交流电路中所谓三相负载对称是指( )。A.
各相阻抗相等
B.
电阻相等、电抗 相等、电抗性质相同
C.
阻抗角相等
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【单选题】Which of the following is a characteristic of economies of scale?
A.
The average cost declines as output increases
B.
The average cost increases as output increases
C.
The average cost remains constant as output increases
D.
The average costs are cheaper when a firm produces a wider variety of goods
【单选题】Economies of scale are:
A.
unit cost increases associated with learning effects.
B.
unit cost reductions due to inferior quality of products.
C.
realized when output is reduced to a minimum.
D.
realized when the selling price is equal to the cost price of the products.
E.
unit cost reductions associated with a large-scale output.
【简答题】Translate the following sentences into English. 这种植物只有在培育它的土壤中才能很好地成长。(other than)
【简答题】用每句后面括号内的词组翻译11-16句,答案写在划线部分。 11. 这种植物只有在培育它的土壤中才能很好地成长。 (other than)
【单选题】Economies of scale have a number of sources, including the ability:
A.
to average out the variable costs of production.
B.
of large-volume producers to utilize specialized employees and equipment.
C.
to adjust the scale of production based upon product saturation in the marketplace.
D.
of to utilize non-specialized employees interchangeably.
【单选题】The existence of internal economies of scale
A.
cannot be associated with a perfectly competitive industry.
B.
may be associated with a perfectly competitive industry.
C.
is associated only with sophisticated products such as aircraft.
D.
cannot form the basis for international trade.
E.
focuses more on the industry than individual firms.
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