设二维随机变量(X,y)满足正(XY)=E(X)E(Y),则X与Y()。
A.独立
B.不独立
C.相关
D.不相关
参考答案:D
--- Do you know the woman _____ glasses? ---Yes. And the girl _____ red is her daughter.
A. with, with
B. in, with
C. with, in
在规划环境影响评价过程中( )公众参与,充分考虑社会各方面利益和主张。
A.必须有 B.最好有C.鼓励和支持 D.不需