仔细观察，找到与长方体或正方体相对应的展开图，连一连。'v2v,U3j1a0m;z/`1Q2K8`8j4C/P.w:p
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算式：提示+r;D0i/H8M1[1D'v2v,U3j1a0m;z/`1Q2K8`8j4C/P.w:p