不属于因果预测模型的是 ( )
A.回归模型
B.一般预测模型
C.经济计量模型
D.投入/产出模型
参考答案:B
解析:因果预测模型有回归模型、经济计量模型、投入/产出模型。
The man ______ was a friend of mine.
A.you just talked to
B.whom you just talked to him
C.who you just talked to him
D.which you just talked to
球蘑机衬板的作用?