2. 外语
  3. In the figure at the right, the legs of fight triangle ACB are diameters of the two semicircles. If AB = 4, what is the sum of t

In the figure at the right, the legs of fight triangle ACB are diameters of the two semicircles. If AB = 4, what is the sum of t

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问题 In the figure at the right, the legs of fight triangle ACB are diameters of the two semicircles. If AB = 4, what is the sum of the areas of the semicircles?
选项 A、π
B、2π
C、4π
D、8π
E、16π
答案B
解析
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