以下投资工具中,不属于固定收益投资工具的是_________。
A.银行存款
B.普通股
C.公司债券
D.优先股
参考答案:B
How ______ you did so much work with such a short time?
A.did it come about
B.did it come about that
C.came about that
D.was it that came about
经济活动分析常用的分析方法()。