题目内容：
A.5πcm
B.10πcm
C.20πcm
D.25πcm
参考答案：
选择题：A.5πcm
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- 题目类型：选择题
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长方体 ABCD﹣ A 1 B 1 C 1 D 1 的体积是 120， 若 E 为 CC 1 的中点， 则三棱锥 E﹣ BCD的体积为（）
长方体 ABCD﹣ A 1 B 1 C 1 D 1 的体积是 120， 若 E 为 CC 1 的中点， 则三棱锥 E﹣ BCD的体积为（）
A.第一象限
A.第一象限