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【单选题】
下列各项属于技术社会形态系列的是（ ）A.
自然经济社会、商品经济社会、产品经济社会
B.
原始公有制社会、私有制社会、共产主义公有制社会
C.
农业社会、工业社会、信息社会
D.
奴隶社会、封建社会、资本主义社会
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反馈参考答案：
举一反三
【单选题】A constant output voltage from an AC generator is maintained by the _____.
A.
prime mover governor
B.
exciter generator
C.
voltage regulator
D.
reverse power relay
【单选题】Total revenue increases at a constant rate as output increases when average revenue:
A.
increases as output increases.
B.
increases and then decreases as output increases.
C.
exceeds price.
D.
is constant.
【单选题】The output voltage, VO, is given by ______.【图片】
A.
V O =
B.
V O =
C.
V O =
D.
None of the above
【单选题】Refer to Figure 12-9. Thefirm experiences constant returns to scale at which output levels?
A.
output levels less than M
B.
output levels between M and N
C.
output levels greater than N
D.
All of the above are correct as long as the firm is operating in the long run.
【单选题】Assuming fixed costs are positive, over a range of output in which average total costs were constant,
A.
average variable costs would be constant as output increases.
B.
average variable costs would be falling as output increases.
C.
average variable costs would be rising as output increases.
D.
marginal cost would be less than average variable cost.
【单选题】The output voltage, VO, is given by _______.【图片】
A.
V O =
B.
V O =
C.
V O =
D.
None of the above
【简答题】宋明理学的代表人物有（）（）（）（）（）。
【单选题】An increase in expected future output while holding today's output constant would
A.
increase today's desired consumption and increase desired national saving.
B.
increase today's desired consumption and decrease desired national saving.
C.
decrease today's desired consumption and increase desired national saving.
D.
decrease today's desired consumption and decrease desired national saving.
相关题目：
【单选题】The output voltage, VO, is given by ______.【图片】
A.
V O =
B.
V O =
C.
V O =
D.
None of the above
参考解析：
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