【单选题】Internal scale economies occur when:
A.
expansion of output by a firm leads to greater specialization of labor.
B.
expansion in an industry drives down the input prices.
C.
industry growth leads to a greater diffusion of knowledge among firms.
D.
a firm pays higher input prices to expand production.
【单选题】The authors attitude towards Nocks ideas is one of ______.
【单选题】2015-30、口服避孕药的禁忌症不包括
【单选题】在《魔鬼经济学》中,黑帮是一个()的职业。
【简答题】A. gu i de B. p i geon C. surpr i sing D. inv i te