题目：
有1角、2角、5角和1元的纸币各1张．现从中抽取至少1张，问可以组成不同的几种币值( )
A．18种
B．17种
C．16种
D．15种
答案：
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有1角、2角、5角和1元的纸币各1张．现从中抽取至少1张，问可以组成不同的几种币值(
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