(  ) A. B. C. D.

作者: tihaiku 人气: - 评论: 0
问题 (  ) A. B. C. D.
选项
答案 B
解析 根据左边纸板可知,折叠后得到的三棱柱其两个三角形的侧面必是空白的,而三个四边形的侧面则是阴影的。

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