A.①②③,④⑤⑥ B.①⑤⑥,②③④ C.①②④,③⑤⑥ D.①②⑥,③④⑤

作者: tihaiku 人气: - 评论: 0
问题 A.①②③,④⑤⑥ B.①⑤⑥,②③④ C.①②④,③⑤⑥ D.①②⑥,③④⑤
选项
答案 D
解析 D [解析]本题中,①②⑥三个图形都有4个封闭区间,③④⑤三个图形都有5个封 闭区间’因此正确的分組是D选项。

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