在完全竞争市场上,厂商处于长期均衡时( )

选择一项或多项:
A. SMC=SMR=SAC=SAR
B. MR=LMC=SMC=LAC=SAC
C. MR=AR=MC=AC
D. MR=LMC=SMC
E. P=LMC=LAC=SMC=SAC
出自:西方经济学(本)