理财产品A与理财产品B的收益率相关系数是0.3，则2份理财产品A和1份理财产品B的收益率相关系数是0.6。( )
参考答案：错
The Whites are living in a house ______ more than a century ago. [ ]
A. to be built
B. built
C. being built
D. having built
一个长方形的长是宽的2倍，宽是5厘米，周长是( )。
