我国社会主义制度的本质要求是维护和实现社会的公平正义。( )
参考答案：对
The experiment has _____ the possibility of the existence of any life on that planet, but it does not mean
there is no life on other planets. [ ]
A. found out
B. pointed out
C. ruled out
D. carried out
证券投资收益包括（）。
A.证券交易的现价
B.证券交易的原价
C.证券交易现价与原价的差
D.定期的股利或利息
