问题
单项选择题
有两个数a和b，其中a的
是b的3倍，那么a: b的值是（）
A．
B．5
C．15
D．
答案
参考答案：C
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有两个数a和b，其中a的是b的3倍，那么a: b的值是（）
A．
B．5
C．15
D．
参考答案：C
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