题目来源
题目来源1 : The Princeton Review
正确率：1%
难度：5
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A is the center of the top face of the right circular cylinder in the figure above. If the degree measure of ∠BAC is four times that of ∠ACB, and the height of the cylinder is equal to the diameter of its base, then the volume of the shaded region is what fraction of the volume of the entire cylinder?
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$$\frac{1}{3}$$ 显示答案
以上解析由 考满分老师提供。
