第2题
A.0.9052
B.0.9582
C.0.9814
D.0.9972
第5题
A.模型元素几何形体没有表达出的信息,采用非几何信息表达的方式
B.模型元素几何形体应根据项目的实际情况选择合适的比例建模
C.模型元素宜包含约束到参照平面上的标注尺寸和标签
D.模型元素的几何形体宜优选用英制单位,如英寸等
E.模型元素可以包含二维或三维的空间约束数据,如:最小操作空间、使用空间、放置和运输空间、安装空间、检测空间等
第9题
A.0.3527mm或0.353mm
B.0.5
C.1
D.2.54mm。因为1英寸等于25.4mm。1英寸等于10磅。所以1磅等于2.54mm
第11题
(1)国内价格将是多少?
(2)国内生产者和消费者的损益各为多少?
(3)对无谓损失和国外生产者会产生什么影响?
Example 9.5 (page 308 ) describes the effects of the sugar quota. In 2005 , imports were limited to 5.3 billion pounds , which pushed the domestic price to 27 cents per pound. Suppose imports were expanded to 10 billion pounds.
a What would be the new U. S. domestic price?
b. How much would consumers gain and domestic producers lose?
c. What would be the effect on deadweight loss and foreign producers?