100, 20, 2, 2／15, 1／150, （) A. 1／3750 B. 1／225 C. 3 D. 1／500
100, 20, 2, 2/15, 1/150, ()
A. 1/3750
B. 1/225
C. 3
D. 1/500
参考答案
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