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问题 多项选择题

下列哪两个因素直接影响消费者的购买决策复杂度，进而影响消费者对搜索的依赖度（）

A.消费介入度

B.品牌差异性

C.产品通用性

D.消费者的收入

答案

参考答案：B, C

填空题

已知函数y=f-1（x）是函数f（x）=2x-1（x≥1）的反函数，则f-1（x）=______．
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选择题

—How much do you know about the 3D film technology?

—A little. Not until _____ the hot movie Avatar______some about it.

A．did I see; did I begin to learn

B．I saw; I began to learn

C．I saw; did I begin to learn

D．did I see; I began to learn
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