作者: tihaiku 人气: - 评论: 0
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解析 ①③。解析:①m ⊥α,则m垂直于α内任意直线,且与α有一个交点M。n∥α,则在α内过点M能找到一条与直线n平行的直线l,则m ⊥ l,所以m ⊥ n;②反例:α内有两条相交的直线l1,l2,且l1∥m,l2//n,则m,n是相交或异面直线;③平面外直线平行于平面的判定定理;④反例:直线ZJ_面7,则过直线1的任意平面都垂直面γ,若平面α,β都过直线l,则它们不平行。

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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
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