【判断题】An industry is a natural monopoly when a single firm can supply a good or service to an entire market at a smaller cost than could two or more firms.
【判断题】22.渐开线齿轮基圆上压力角为 20 °。
【单选题】When a single firm can produce output over the relevant range of demand more efficiently than two or more firms can, because of the existence of economies of scale, we have:
B.
monopolistic competition.
C.
diseconomies of scale.
【多选题】1946年6月23日,在南京下关被国民党殴伤的上海人民团体联合会请愿团成员是 ( )
【单选题】A computer software firm has developed a new and better spreadsheet program. The program is protected by copyrights, so the firm can act as a monopolist for this product. The demand function for the s...
【单选题】下面哪种基准通常用于销售煤,物料平衡、热平衡及热效率计算( )
【单选题】有关五张图中现实的配电系统的哪种说法是正确 的?
【判断题】磁场的高斯定理表明,任何磁场中,闭合曲面的磁通量恒等于零,也表明了磁通的连续性或磁单极子不存在。
【单选题】A monopoly firm can sell 150 units of output for $10 per unit. Alternatively, it can sell 151 units of output for $9.95 per unit. The marginal revenue of the 151st unit of output is
【简答题】《旧唐书·杜甫传》 杜甫,字子美,本襄阳人,后徙河南巩县。曾祖依艺,位终巩令。祖审言,位终膳部员外郎,自有传。父闲,终奉天令。 甫初应进士不第。末,献《三大礼赋》。玄宗奇之,召试文章,授京兆府兵曹参军。十五载,禄山陷京师,肃宗征兵灵武。甫自京师宵遁赴河西,谒肃宗于彭原郡,拜右拾遗。房琯布衣时与甫善,时琯为,请自帅师讨贼,帝许之。其年十月琯兵败于陈涛斜明年春琯罢相甫上疏言琯有才不宜罢免肃...