Teenagers whose parents smoke are at risk of getting lung cancer at some time during their
A. YES
B. NO
C. NOT GIVEN
The total quantity of water on Earth______
A. remains almost unchanged.
B. has greatly increased in recent years.
C. is decreasing constantly.
D. is affected by global warming.
假设A证券的标准离差是12%,B证券的标准离差是20%,AB证券之间的预期相关系数为0.2,在资产组合中A证券占的比例为70%,B证券占的比例为30%,则AB资产组合收益率的标准离差为11.26%。()
A. 正确
B. 错误
基金获准上市的,应在上市日前一周内,将基金份额上市交易公告书登载在指定报刊和管理人网站上。()
A. 正确
B. 错误