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【单选题】
关于定理四,正确的是?A.
R拔是由S拔扩充而成的
B.
R拔是S拔的子环
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举一反三
【简答题】Refer to Exhibit 6-3. The graph that best illustrates a relatively inelastic (but not perfectly inelastic) range along a demand curve is:A. Graph A. B. Graph B. C. Graph C. D. Graph D.
【单选题】Refer to graph 4.2 of question #13. At a price of $35,__________.
A.
a shortage would exist and the price would tend to fall from $35 to a lower price.
B.
a surplus would exist and the price would tend to rise from $35 to a higher price.
C.
a surplus would exist and the price would tend to fall from $35 to a lower price.
D.
an excess demand would exist and the price would tend to fall from $35 to a lower price.
【简答题】Refer to Exhibit 6-3. The graph that best illustrates a perfectly elastic demand curve isA. Graph A B. Graph B. C. Graph C D. Graph D
【简答题】Refer to Exhibit 6-3. The graph that best illustrates a perfectly inelastic demand curve is:A. Graph A. B. Graph B. C. Graph C. D. Graph D.
【简答题】：14 20 54 76 （ ） A．104 B.116 C.126 D144
【单选题】Refer to Figure 4. The graph represents a market in which
A.
there is no externality
B.
there is a positive externality
C.
there is a negative externality
D.
The answer cannot be determined from inspection of the graph
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