命题“存在实数x,使x>1”的否定是( )。A.对任意实数x,都有x>l B.不存在实数x,使x≤1 C.对任意实数x,都有x≤1 D.存在实...

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问题 命题“存在实数x,使x>1”的否定是( )。
选项 A.对任意实数x,都有x>l B.不存在实数x,使x≤1 C.对任意实数x,都有x≤1 D.存在实数x,使x≤l
答案 C
解析
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  • 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.'; ?>