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【单选题】
老子说“我有三宝,持而”,下面哪句话是对老子“三宝”的正确表述?A.
一曰德，二曰道，三曰无为。
B.
一曰慈，二曰俭，三曰不敢为天下先。
C.
一曰俭，二曰慈，三曰不敢为天下先。
D.
一曰道，二德，三曰无为。
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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（）（）（）（）（）。
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
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