题型:选择题 ________ made his family disappointed.[ ]A. He not being chosen B. His not having been chosenC. Him not being chosen D. He was not chosen 查看答案
题型:单项选择题 垄断竞争理论的假设条件之一是()A.产品存在差异,但各厂商的产品可相互替代B.厂商很少,但每个厂商可忽视其他厂商对自己利益的影响C.行业内部不存在竞争D.各个厂商具有相同的成本曲线 查看答案