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【单选题】
如果从上面看到的是和下面图形一样,用5个小正方体摆放,共有多少种摆法?(提示:第三层有位置吗)
A.
6
B.
9
C.
11
D.
13
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A.
had seen; would be helping
B.
saw; will help
C.
have seen; would help
D.
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have seen; would help
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