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Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /www/wwwroot/lxsjfx.cn/foxconn/naojin/index.php on line 3 一个长方体盒子,有8个角,8条边,请问这个长方体盒子从中剪切开,还剩几 个角,几条边?脑筋急转弯-实用工具-实用查询-全聚合网址导航-个性网址导航