• 完善的课程咨询
  • 专注在职教育十多年
  • 不需要参加全国联考,只需通过审核即可推荐入学

400-666-4820

MBA数学高效备考全攻略:5大核心技巧助你突破复习瓶颈

来源:大连新与成国际商学院 时间:12-23

MBA数学高效备考全攻略:5大核心技巧助你突破复习瓶颈

大纲是基础,延伸知识不可少

对于首次接触MBA联考的考生而言,数学往往是最让人头疼的科目。但实际备考中,许多人忽略了一个关键——考试大纲的正确使用方式。大纲明确标注了考试范围,是复习的基础框架,但绝不是全部边界。以函数连续性为例,大纲中并未直接提及"极限"概念,可历年真题中关于函数连续的判断题,几乎都需要通过极限思想来推导。

去年有位考生在复习时严格按大纲划重点,刻意跳过了极限部分,结果在考场上遇到"判断函数f(x)=x²在x=1处是否连续"的题目时,因不理解"左极限=右极限=函数值"的核心逻辑而卡壳。这提醒我们:像极限这类作为其他知识点基础的概念,即使不在大纲明确范围内,也需要主动补充学习。类似的还有概率中的0-1分布,虽然大纲可能只要求掌握基础概率公式,但实际解题中涉及独立重复试验时,0-1分布的应用场景往往是解题关键。

以题带点,深化概念理解

数学中的抽象概念常让考生望而却步。比如线性相关、矩阵秩这些术语,单纯看教材定义容易陷入"背了就忘,忘了再背"的循环。这时候,通过具体题目来理解概念往往更有效。以线性相关为例,教材中定义"存在不全为零的常数使得线性组合为零向量",听起来非常抽象。但结合题目"判断向量组α₁=(1,0,0),α₂=(0,1,0),α₃=(1,1,0)是否线性相关"来分析,通过构造方程k₁α₁+k₂α₂+k₃α₃=0,会发现k₁=k₂=-k₃时方程成立,从而直观理解"存在非零解即线性相关"的核心。

有位二战考生分享经验时提到,他曾花一周时间反复背诵"极大线性无关组"的定义,结果做题时依然无法准确判断。后来他找了20道相关例题,每道题都先自己推导再对照答案,逐渐发现"极大无关组的向量个数等于矩阵的秩"这一规律,不仅理解了概念,解题速度也提升了3倍。这说明:抽象概念需要具体题目作为"载体",通过分析题目条件、推导过程和结论,能更深刻地把握概念本质。

真题是宝,高频考点早知道

在所有复习资料中,历年真题的价值无可替代。近5年的MBA数学真题中,求积分面积、线性方程组求解、概率分布计算这三类题型出现频率超过80%。以积分面积为例,2020年考的是"计算y=x²与y=√x围成的区域面积",2021年考"y=sinx在[0,π]与x轴围成的面积",2022年则结合了参数方程"x=t²,y=t³在t=0到t=1间的面积"。虽然形式不同,但核心都是"确定积分上下限,选择积分变量,计算定积分"。

建议考生将近10年真题按章节分类整理,用表格统计每个知识点的出现次数和分值占比。比如统计后会发现,"函数与极限"占15-20分,"线性代数"占25-30分,"概率论"占20-25分。整理过程本身就是对知识点的系统梳理,能帮助考生明确"哪些内容必须精通,哪些可以适当弱化"。到了冲刺阶段,针对高频考点进行专项训练,比如每天集中做10道积分面积题,连续训练一周,考试时遇到同类题目就能快速反应。

时间管理,培养解题节奏感

综合科目3小时要完成25道数学题、30道逻辑题和2篇作文,平均每道数学题只有7分钟左右的时间。但实际考试中,许多考生因数学耗时过长导致作文写不完。这就需要在日常练习中刻意培养时间意识。建议从基础阶段开始,做题时就使用计时器,记录每道题的完成时间。比如做10道题时,设定总时间70分钟(每道7分钟),到时间就停笔,统计完成率和正确率。

一位上岸考生的经验是:将数学题分为"简单题(3分钟内解决)""中等题(5分钟内解决)""难题(8分钟以上)"三类。日常练习时,简单题必须控制在2分钟,中等题4分钟,这样考试时即使遇到稍难的题目,也能通过前期节省的时间弥补。此外,每周进行1次全真模拟,完全按照考试时间安排,既能适应高强度答题节奏,又能发现自己的时间分配短板。

策略性放弃,避免因小失大

考试中遇到卡壳的题目是常事,关键是如何处理。如果一道题超过5分钟还没有思路,继续硬啃不仅浪费时间,还会影响后续答题心态。这时候建议用记号笔标记,先完成其他题目。比如去年有位考生在第12题遇到复杂的矩阵运算,卡了10分钟仍无进展,导致后面的概率题和逻辑题都没时间仔细思考。而另一位考生同样遇到难题,选择先跳过,完成所有会做的题目后,再回头用排除法和代入法解题,反而更高效。

具体操作时,可以准备两种颜色的笔:黑色笔正常答题,红色笔标记难题。交卷前15分钟,优先检查黑色笔答题部分,确保基础分拿到手;红色标记的题目,用代入法验证选项(比如将选项代入方程看是否成立),或通过排除法缩小范围(比如根据奇偶性、取值范围排除错误选项)。这种策略能化利用考试时间,避免因一两道题影响整体得分。

总结:科学方法+刻意训练=数学突破

MBA数学复习没有捷径,但有规律可循。从大纲延伸学习到概念深化,从真题研究到时间管理,再到策略性放弃,每个环节都需要考生用心琢磨、反复练习。只要掌握正确的方法并坚持执行,数学不仅不会成为阻碍,还能成为拉开分数差距的优势科目。

课程导航
基本 文件 流程 错误 SQL 调试
  1. 请求信息 : 2026-04-06 05:01:15 HTTP/1.1 GET : http://www.aabqn.com/s/4231/n/25658.html
  2. 运行时间 : 0.011105s [ 吞吐率:90.05req/s ] 内存消耗:385.98kb 文件加载:137
  3. 缓存信息 : 0 reads,0 writes
  1. /data/web/baijiao_branch_collect/public/index.php ( 0.79 KB )
  2. /data/web/baijiao_branch_collect/vendor/autoload.php ( 0.75 KB )
  3. /data/web/baijiao_branch_collect/vendor/composer/autoload_real.php ( 1.63 KB )
  4. /data/web/baijiao_branch_collect/vendor/composer/platform_check.php ( 0.90 KB )
  5. /data/web/baijiao_branch_collect/vendor/composer/ClassLoader.php ( 15.99 KB )
  6. /data/web/baijiao_branch_collect/vendor/composer/autoload_static.php ( 4.26 KB )
  7. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/helper.php ( 8.34 KB )
  8. /data/web/baijiao_branch_collect/vendor/topthink/think-validate/src/helper.php ( 2.19 KB )
  9. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/helper.php ( 1.47 KB )
  10. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/stubs/load_stubs.php ( 0.16 KB )
  11. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Exception.php ( 1.69 KB )
  12. /data/web/baijiao_branch_collect/vendor/topthink/think-container/src/Facade.php ( 2.71 KB )
  13. /data/web/baijiao_branch_collect/vendor/symfony/deprecation-contracts/function.php ( 0.99 KB )
  14. /data/web/baijiao_branch_collect/vendor/symfony/polyfill-mbstring/bootstrap.php ( 8.26 KB )
  15. /data/web/baijiao_branch_collect/vendor/symfony/polyfill-mbstring/bootstrap80.php ( 9.78 KB )
  16. /data/web/baijiao_branch_collect/vendor/symfony/var-dumper/Resources/functions/dump.php ( 1.49 KB )
  17. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/App.php ( 15.30 KB )
  18. /data/web/baijiao_branch_collect/vendor/topthink/think-container/src/Container.php ( 15.76 KB )
  19. /data/web/baijiao_branch_collect/vendor/psr/container/src/ContainerInterface.php ( 1.02 KB )
  20. /data/web/baijiao_branch_collect/app/provider.php ( 0.19 KB )
  21. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Http.php ( 6.04 KB )
  22. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/helper/Str.php ( 7.29 KB )
  23. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Env.php ( 4.68 KB )
  24. /data/web/baijiao_branch_collect/app/common.php ( 10.83 KB )
  25. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/helper.php ( 18.78 KB )
  26. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Config.php ( 5.54 KB )
  27. /data/web/baijiao_branch_collect/config/app.php ( 1.29 KB )
  28. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/facade/Env.php ( 1.67 KB )
  29. /data/web/baijiao_branch_collect/config/cache.php ( 1.22 KB )
  30. /data/web/baijiao_branch_collect/config/config.php ( 0.26 KB )
  31. /data/web/baijiao_branch_collect/config/console.php ( 0.29 KB )
  32. /data/web/baijiao_branch_collect/config/cookie.php ( 0.56 KB )
  33. /data/web/baijiao_branch_collect/config/database.php ( 2.29 KB )
  34. /data/web/baijiao_branch_collect/config/filesystem.php ( 0.63 KB )
  35. /data/web/baijiao_branch_collect/config/lang.php ( 0.81 KB )
  36. /data/web/baijiao_branch_collect/config/log.php ( 1.37 KB )
  37. /data/web/baijiao_branch_collect/config/middleware.php ( 0.19 KB )
  38. /data/web/baijiao_branch_collect/config/route.php ( 1.54 KB )
  39. /data/web/baijiao_branch_collect/config/session.php ( 0.57 KB )
  40. /data/web/baijiao_branch_collect/config/trace.php ( 0.34 KB )
  41. /data/web/baijiao_branch_collect/config/view.php ( 0.81 KB )
  42. /data/web/baijiao_branch_collect/app/event.php ( 0.25 KB )
  43. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Event.php ( 7.67 KB )
  44. /data/web/baijiao_branch_collect/app/service.php ( 0.13 KB )
  45. /data/web/baijiao_branch_collect/app/AppService.php ( 0.26 KB )
  46. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Service.php ( 1.64 KB )
  47. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Lang.php ( 7.35 KB )
  48. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/lang/zh-cn.php ( 13.70 KB )
  49. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/initializer/Error.php ( 3.31 KB )
  50. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/initializer/RegisterService.php ( 1.33 KB )
  51. /data/web/baijiao_branch_collect/vendor/services.php ( 0.14 KB )
  52. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/service/PaginatorService.php ( 1.52 KB )
  53. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/service/ValidateService.php ( 0.99 KB )
  54. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/service/ModelService.php ( 2.04 KB )
  55. /data/web/baijiao_branch_collect/vendor/topthink/think-trace/src/Service.php ( 0.77 KB )
  56. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Middleware.php ( 6.72 KB )
  57. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/initializer/BootService.php ( 0.77 KB )
  58. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/Paginator.php ( 11.86 KB )
  59. /data/web/baijiao_branch_collect/vendor/topthink/think-validate/src/Validate.php ( 63.20 KB )
  60. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/Model.php ( 23.55 KB )
  61. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/Attribute.php ( 21.05 KB )
  62. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/AutoWriteData.php ( 4.20 KB )
  63. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/Conversion.php ( 6.75 KB )
  64. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/DbConnect.php ( 5.16 KB )
  65. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/ModelEvent.php ( 2.33 KB )
  66. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/RelationShip.php ( 28.30 KB )
  67. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/contract/Arrayable.php ( 0.09 KB )
  68. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/contract/Jsonable.php ( 0.13 KB )
  69. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/contract/Modelable.php ( 0.09 KB )
  70. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Db.php ( 2.88 KB )
  71. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/DbManager.php ( 8.52 KB )
  72. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Log.php ( 6.28 KB )
  73. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Manager.php ( 3.92 KB )
  74. /data/web/baijiao_branch_collect/vendor/psr/log/src/LoggerTrait.php ( 2.69 KB )
  75. /data/web/baijiao_branch_collect/vendor/psr/log/src/LoggerInterface.php ( 2.71 KB )
  76. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Cache.php ( 4.92 KB )
  77. /data/web/baijiao_branch_collect/vendor/psr/simple-cache/src/CacheInterface.php ( 4.71 KB )
  78. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/helper/Arr.php ( 17.45 KB )
  79. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/cache/driver/Redis.php ( 6.94 KB )
  80. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/cache/Driver.php ( 9.03 KB )
  81. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/contract/CacheHandlerInterface.php ( 1.99 KB )
  82. /data/web/baijiao_branch_collect/app/Request.php ( 0.09 KB )
  83. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Request.php ( 55.78 KB )
  84. /data/web/baijiao_branch_collect/app/middleware.php ( 0.26 KB )
  85. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Pipeline.php ( 2.61 KB )
  86. /data/web/baijiao_branch_collect/vendor/topthink/think-trace/src/TraceDebug.php ( 3.40 KB )
  87. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Route.php ( 23.73 KB )
  88. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/RuleName.php ( 5.75 KB )
  89. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/Domain.php ( 2.53 KB )
  90. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/RuleGroup.php ( 22.43 KB )
  91. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/Rule.php ( 26.95 KB )
  92. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/RuleItem.php ( 9.78 KB )
  93. /data/web/baijiao_branch_collect/route/app.php ( 3.05 KB )
  94. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/facade/Route.php ( 4.70 KB )
  95. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/dispatch/Controller.php ( 4.74 KB )
  96. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/Dispatch.php ( 10.44 KB )
  97. /data/web/baijiao_branch_collect/app/controller/Index.php ( 33.26 KB )
  98. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/facade/Request.php ( 9.20 KB )
  99. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/Url.php ( 14.07 KB )
  100. /data/web/baijiao_branch_collect/app/model/IndexModel.php ( 19.95 KB )
  101. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/facade/Config.php ( 1.37 KB )
  102. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/facade/Cache.php ( 2.06 KB )
  103. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/facade/Db.php ( 0.93 KB )
  104. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/connector/Mysql.php ( 5.73 KB )
  105. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/PDOConnection.php ( 53.74 KB )
  106. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/Connection.php ( 8.39 KB )
  107. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/ConnectionInterface.php ( 4.57 KB )
  108. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/builder/Mysql.php ( 16.58 KB )
  109. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/Builder.php ( 24.07 KB )
  110. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/BaseBuilder.php ( 27.50 KB )
  111. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/Query.php ( 15.97 KB )
  112. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/BaseQuery.php ( 45.13 KB )
  113. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/TimeFieldQuery.php ( 7.43 KB )
  114. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/AggregateQuery.php ( 3.26 KB )
  115. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/ModelRelationQuery.php ( 20.07 KB )
  116. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/ParamsBind.php ( 3.66 KB )
  117. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/ResultOperation.php ( 7.01 KB )
  118. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/WhereQuery.php ( 19.37 KB )
  119. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/JoinAndViewQuery.php ( 7.11 KB )
  120. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/TableFieldInfo.php ( 2.63 KB )
  121. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/Transaction.php ( 2.77 KB )
  122. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/log/driver/File.php ( 5.96 KB )
  123. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/contract/LogHandlerInterface.php ( 0.86 KB )
  124. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/log/Channel.php ( 3.89 KB )
  125. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/event/LogRecord.php ( 1.02 KB )
  126. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/Collection.php ( 16.47 KB )
  127. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Response.php ( 8.81 KB )
  128. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/response/View.php ( 3.29 KB )
  129. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Cookie.php ( 6.06 KB )
  130. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/View.php ( 4.39 KB )
  131. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/view/driver/Php.php ( 6.44 KB )
  132. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/contract/TemplateHandlerInterface.php ( 1.60 KB )
  133. /data/web/baijiao_branch_collect/view/index/pc/school_news_details.php ( 2.39 KB )
  134. /data/web/baijiao_branch_collect/view/index/pc/school_top.php ( 5.76 KB )
  135. /data/web/baijiao_branch_collect/view/index/pc/school_right.php ( 2.17 KB )
  136. /data/web/baijiao_branch_collect/view/index/pc/school_bottom.php ( 1.16 KB )
  137. /data/web/baijiao_branch_collect/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000356s ] mysql:host=127.0.0.1;port=3306;dbname=baijiao_branch_collect;charset=utf8
  2. SHOW FULL COLUMNS FROM `fqi_school` [ RunTime:0.000836s ]
  3. SELECT * FROM `fqi_school` WHERE `school_id` = '4231' AND `site_id` = 18 AND `school_status` = 1 LIMIT 1 [ RunTime:0.000232s ]
  4. SHOW FULL COLUMNS FROM `fqi_school_class` [ RunTime:0.000544s ]
  5. SELECT * FROM `fqi_school_class` WHERE `school_id` = 4231 [ RunTime:0.000183s ]
  6. SHOW FULL COLUMNS FROM `fqi_school_campus` [ RunTime:0.000583s ]
  7. SELECT * FROM `fqi_school_campus` WHERE `school_id` = 4231 [ RunTime:0.000167s ]
  8. SHOW FULL COLUMNS FROM `fqi_school_news` [ RunTime:0.000626s ]
  9. SELECT `a`.*,`content` FROM `fqi_school_news` `a` LEFT JOIN `fqi_school_news_content` `b` ON `b`.`content_id`=`a`.`content_id` WHERE `school_id` = 4231 AND `a`.`content_id` = '25658' AND `news_status` = 1 AND `school_status` = 1 LIMIT 1 [ RunTime:0.000205s ]
  10. (select content_id,news_name,school_id from fqi_school_news where school_id = '4231' and content_id < '25658' and site_id <= '18' order by content_id desc limit 1) union all(select content_id,news_name,school_id from fqi_school_news where school_id = '4231' and content_id > '25658' and site_id <= '18' order by content_id asc limit 1) [ RunTime:0.000330s ]
  11. SHOW FULL COLUMNS FROM `fqi_school_course` [ RunTime:0.000669s ]
  12. SELECT * FROM `fqi_school_course` WHERE `school_id` = 4231 AND `site_id` = 18 AND `course_status` = 1 AND `school_status` = 1 ORDER BY `course_id` DESC LIMIT 4 [ RunTime:0.000282s ]
  13. SELECT * FROM `fqi_school_course` WHERE `school_id` = 4231 AND `school_status` = 1 AND `course_status` = 1 ORDER BY `course_id` DESC LIMIT 8 [ RunTime:0.000181s ]
  14. SELECT * FROM `fqi_school_news` WHERE `school_id` = 4231 ORDER BY `click` DESC,`news_id` DESC LIMIT 5 [ RunTime:0.000155s ]
  15. SELECT `content_id`,`news_name`,`a`.`school_id`,`b`.`school_name` FROM `fqi_school_news` `a` LEFT JOIN `fqi_school` `b` ON `b`.`school_id`=`a`.`school_id` WHERE `a`.`site_id` = '18' AND `b`.`school_status` = '1' AND `news_status` = 1 AND `content_id` < 25658 ORDER BY `content_id` DESC LIMIT 20 [ RunTime:0.002420s ]
0.011408s