基金份额总数可变且投资者可在每个营业日申购或赎回基金份额的是（）
A.公司型基金
B.契约型基金
C.开放式基金
D.封闭式基金
参考答案：C
利率的期限结构反映（）与（）之间形成的关系结构。
() that a society like the National Society for the Prevention of Cruelty to Children is still needed in a civilized country
A. How does it come
B. How it comes
C. How did it come about
D. How did it come
