公债的特征有()。
A.安全性高
B.流动性好
C.收益稳定
D.免税待遇
参考答案:A, B, C, D
—Let’s go to the fashion show this afternoon, shall we? — I _________ it. It’s very interesting.
A.have seen
B.am seeing
C.saw
D.had seen
“投保资助”型社会保障制度的特点。