在边长为 6 米的正方形草场四周,每隔一米栽一棵树,四个角也要栽树,一共要栽( )棵树。A.28 B.24 C.20 D.18

作者: tihaiku 人气: - 评论: 0
问题 在边长为 6 米的正方形草场四周,每隔一米栽一棵树,四个角也要栽树,一共要栽( )棵树。
选项 A.28 B.24 C.20 D.18
答案 B
解析 闭合路线植树。一共要栽4×6÷1=24棵,故本题选B。
更多 网友评论0 条评论)
暂无评论
错误啦!

错误信息

  • 消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
  • 文件: /twcms/kongphp/cache/cache_redis.class.php
  • 位置: 第 85 行
    <?php echo 'KongPHP, Road to Jane.'; ?>