北京是第几个举办奥运会的亚洲城市?()
A、第一个
B、第二个
C、第三个
D、第四个
参考答案:C
Many lifestyle patterns do such ________ great harm to health that they actually speed up ________ weakening of the human body.[ ]
A.a;/
B./;the
C.a;the
D./;/
在实务中衡量投资组合风险最常用的指标是()。
A.收益额
B.期望收益率
C.方差
D.协方差