Below is a double-tiered cardboard configuration that is closed. (The configuration is shown here as transparent for easier view

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问题 Below is a double-tiered cardboard configuration that is closed. (The configuration is shown here as transparent for easier viewing. )

Which one of the following choices is a valid depiction of this configuration if it were to be "disassembled" enough to lie flat?

选项 A、1
B、2
C、3
D、4

答案B

解析在第二个图中，最右侧和最左侧的两个方格是纸板结构的顶部和底部。

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A类竞赛（研究生）

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