A：财政应保持大量节余
B：财政收入是财政支出的目的
C：合理的财政支出能够增加财政收入
D：财政是国家实现其职能的物质保证
一个正方体内接于一个高为2，底面半径为1的圆锥，则正方体的棱长为____
欧洲第一长河是：
If someone spends his or her time, effort and money writing a book, for example, he or she deserves _______ for it.
