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A.MR=SMC=LMCB.MR≠SMC≠LMCC.MR<SMC<LMCD.MR>SMC>LMC下列哪一项是完……

下列哪一项是完全垄断市场达到长期均衡的标志?()

A.MR=SMC=LMC
B.MR≠SMC≠LMC
C.MR<SMC<LMC
D.MR>SMC>LMC

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