债券基金提供了长期的投资增值性，可满足投资者教育支出、退休支出等远期支出的需要。（）
参考答案：错
解析：了解债券基金在投资组合中的作用。
— How are you getting along with your project?
— I was about to give up when an idea occurred to me ____ I could work with my roommate Tim. [ ]
A. that
B. how
C. why
D. whether
在国际贸易实践中，买方或银行或提单受让人乐于接受( )。
A．清洁提单
B．指示提单
C．已装船提单
D．不清洁提单
