年初剩余的551万农村贫困人口全部脱贫、52个贫困县全部摘帽。 A: All remaining poor rural residents, totaling 55.1 million in early 2020, were lifted from poverty, as were all of China’s remaining 52 poor counties. B: All remained poor rural residents, totaling 5.51 million in early 2020, were lifted from poverty, as were all of China’s remaining 52 poor counties. C: All remaining poor rural residents, totaling 5.51 million in early 2020, were lifted from poverty, as were all of China’s remaining 52 poor counties.

English writers in the Victorian period were all concerned about the fate of .

When analyzing competition, one should put more emphasis on direct competition than on indirect competition.

中国大学MOOC: The early achievements in space exploration were all crash-landings, each spacecraft _________.

Select the statement that distinguishes monopolistic competition from perfect competition. A: No barriers to entry/exist in monopolistic competition. B: A firm in monopolistic competition can set its own price and output. C: A firm in monopolistic competition makes zero economic profit in the long run. D: Close substitutes are available in monopolistic competition.