A.(19)(18)(8)(7)(5)(2)(4)(7)(13)
B.(19)(18)(7)(8)(2)(5)(4)(7)(13)
C.(18)(19)(7)(8)(5)(2)(4)(7)(13)
D.(18)(19)(8)(7)(5)(2)(4)(13)(7)
判断下面各组词的词性。
(1)热爱 可爱 (2)答案答应 (3)战争作战
(4)非常 平常 (5)青年年轻 (6)坚决决心
(7)不免难免 (8)肯定一定 (9)果然偶然
(10)所谓无谓 (11)迅即 迅速 (12)原来原先
(13)总算 总之 (14)着急着凉 (15)风流风行
(16)多方 多端 (17)火急火速 (18)既然 既往
(19)假设假若 (20)节俭节减
下表是国外某研究小组的调查结果。试问:受教育程度与年收入之间是否存在线性相关?并计算回归模型、可决系数R2,以及解释R2的意义。
小组 | 平均受教育年限(X) | 平均年收入(1000美元)(y) |
1 2 3 4 5 6 7 8 9 10 11 | 3 4 5 7 6 9 11 12 16 15 21 | 3 4 5 7 9 11 13 20 35 40 50 |
雇佣工人数 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
最后一个工人的边际产出 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 |
起初,本国雇佣了11个工人,而外国只有3个工人。试说明劳动力从本国向外国自由流动对两国就业、生产、实际工资和土地所有者收入的影响。
In Home and Foreign there are two factors of production,land and labor,used to produce only one good.The land supply in each country and the technology of production are exactly the same.The marginal product of labor in each country depends on employment as follows:
Number of Workers Employed | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
Marginal Product of Last Worker | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 |
Initially,there are 11 workers employed in Home,but only 3 workers in Foreign.
Find the effect 0f free movement of labor from Home to Foreign on employment,production,real wages,and the income of landowners in each country.
某消费者购买商品X和Y的边际效用
商品单位/件1 2 3 4 5 6 7 8
X的边际效用20 18 16 13 10 6 4 2
Y的边际效用50 45 40 35 30 25 20 15
试分析:
(1)该消费者如何购买X和Y才能达到均衡?
(2)达到均衡时该消费者得到的最大效用是多少
表2-3
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