一元线性回归数字模型为()。
Ay=a+βx+ε
By=ax+β
Cy=a+βx-ε
Dy=ax-β
参考答案:B
. The _____ look on his face suggested that it was he who had broken into the house.
A.fright
B.frightened
C.frighten
D.frightening
不属于投资宏观调控的重要指标的是()。
A.投资方法
B.在建投资规模
C.投资增长率
D.年度投资规模