有两种溶液,甲溶液中蛋清的浓度为20%,蜂蜜的浓度为15%,乙溶液中蛋清的浓度为50%,蜂蜜的浓度为20%,现在有甲溶液2千克,要将一定量的乙溶液与甲溶液...

作者: tihaiku 人气: - 评论: 0
问题 有两种溶液,甲溶液中蛋清的浓度为20%,蜂蜜的浓度为15%,乙溶液中蛋清的浓度为50%,蜂蜜的浓度为20%,现在有甲溶液2千克,要将一定量的乙溶液与甲溶液混合,混合后所得溶液的蛋清浓度是蜂蜜浓度的2倍,问需要多少千克的乙溶液?( ) A. 2 B. 1.5 C. 1 D. 0.5
选项
答案 A
解析 设需要x千克的乙溶液,根据题意列方程 故本題选A。
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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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