线性消费曲线与45度线之间的垂直距离是（）。
A.自发性消费
B.储蓄
C.可支配收入
D.总消费
参考答案：B
-How come your father can read books in German?
-Well, he _______ on a project with some German engineers for 3 years when he was young. [ ]
A. worked
B. has worked
C. had worked
D. would work
专利检索中，中国专利，外观设计，筛选条件：公开日期：2013/05/01-2013/06/01*专利权人：”浙江大学”，检索结果中”固定建筑物”类型的有（）条。
A.5
B.4
C.8
D.40
