一项工程,甲单独完成需12天,乙单独完成需9天,若甲先做若干天后,改由乙接着做,共用10天完成,则甲做的天数是:A.6 B.5 C.3 D.4

作者: rantiku 人气: - 评论: 0
问题 一项工程,甲单独完成需12天,乙单独完成需9天,若甲先做若干天后,改由乙接着做,共用10天完成,则甲做的天数是: A.6 B.5 C.3 D.4
选项
答案 D
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
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