There are four neighbors A, B, C and D in a row. We have known that A is next to B, and A is not next to D. If D is not next to

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问题 There are four neighbors A, B, C and D in a row. We have known that A is next to B, and A is not next to D. If D is not next to C too, then, who is next to C?

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答案A

解析 由题意知:B的两侧分别是A与D,C不与D相邻则必定与A相邻。
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