构建证券组合的原因是( )
A.降低系统性风险
B.降低非系统性风险
C.增加系统性收益
D.增加非系统性收益
参考答案:D
— Is Li Ping's brother a bus driver?
— _____________.[ ]
A. I don't think
B. You are wrong
C. No, I think not
D. Yes, I think so
( )是公安决策正确性的根本保证。
A.党的领导
B.群众的监督
C.政府的领导
D.公安机关自身的监督