题目来源
题目来源1 : The Princeton Review
正确率：87%
难度：2
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Line AB passes through the center of circle O and through the centers of each of the 3 identical smaller circles. Each circle touches two other circles at exactly one point each.
Quantity A
The circumference of circle O
Quantity B
The sum of the circumferences of the 3 smaller circles
C显示答案
以上解析由 考满分老师提供。
