根据成因分类，矿物颜色有（）种。A.1 B.2 C.3 D.4_爱下问搜题

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问题单项选择题

根据成因分类，矿物颜色有（）种。

A.1

B.2

C.3

D.4

答案

参考答案：C

选择题

Mum likes this old house in downtown better than the huge one in the country, but it costs almost .

A．twice as much

B．twice as many

C．twice so much

D．twice so many

单项选择题

市场投资组合的p系数等于（）。

A．0

B．1

C．-1

D．-1到1之间的随机值