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【初中科学·教材详解】26新版浙教版九上科学课本导读:九下第三章

  • 2026-08-07 04:59:55
【初中科学·教材详解】26新版浙教版九上科学课本导读:九下第三章
本周我们继续讨论新教材九下第三章的内容变化，内容对应老教材九下第二章。同样先奉送一个放在开头的总结精要版：
一、整体调整不大，须与七上生态系统部分叙述进行联系；
二、能量流动率相关计算可能会考。
九下第三章的具体导读：
不吐不快：所以把生态系统和食物网食物链丢在七上是要干嘛呀。。。就是你在七上不写这部分影响学生对于生物的认识吗？结果到了九年级还得再来一遍。
第一节 生态系统的结构
①种群与群落：这部分与旧版差别大。
新增了一个以“桑基鱼塘”为代表的立体农业科学阅读。
②生态系统的成分：调整不大。
③能的流动和物质循环：这部分给出了一个有具体数值的能量金字塔，所以食物链中能量流动率10%~20%是不是可以认为是明牌内容了？估计会引入一些基础的能量流动率计算题，和孟德尔种豌豆一样，很明显是加强的信号。
④生命系统的层次结构：说实话硬要把细胞→组织→器官→系统→个体以及种群→群落→生态系统→生物圈两块层次结构组合起来的思路，其实有点令人无语。之前说了好多次这个编委里生物老师的脑洞确实有点大。
第二节 生态系统的稳定
①生态系统的稳定与变化、②破坏生态平衡的因素：整一节都是片汤话，和旧版相比有改动，但意义不大。
新增了一个人造生物圈，这个和之前的生物圈二号一样，是有出题空间的。
总的来说，生态系统这一章节其实是强行被切割成两部分放在了七上和九下两本教材中，毫无疑问可荣膺浙教版编写最不合理的章节之一。能量流动率相关问题应作一定程度重视，其余则改动不大，不太会出难题。
最后同样给出一些意见：在往年的经验基础上，老师备课或学生预习要注意以下几个点：
①预习时需简单回顾七上科学生态系统部分的内容，以便和本章节内容形成整体。
②找一些能量流动率计算题练手。
③在章节学习评价部分也介绍了生物富集现象，这部分内容可以与能量流动率结合起来讲解，作为有计算的环节也可以一起进行练习。
#浙江科学#浙教版科学九年级下册#真题#九年级科学#课本#杭州上城区 #中考科学 #中考模拟
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2026秋|小学语文二年级上册新教材《1-8单元生字词默写》含答案(可下载打印)

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  1. CONNECT:[ UseTime:0.000522s ] mysql:host=127.0.0.1;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000850s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000310s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000245s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000469s ]
  6. SELECT * FROM `set` [ RunTime:0.000228s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000571s ]
  8. SELECT * FROM `article` WHERE `id` = 470088 LIMIT 1 [ RunTime:0.000518s ]
  9. UPDATE `article` SET `lasttime` = 1786093619 WHERE `id` = 470088 [ RunTime:0.003730s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000305s ]
  11. SELECT * FROM `article` WHERE `id` < 470088 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000571s ]
  12. SELECT * FROM `article` WHERE `id` > 470088 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000524s ]
  13. SELECT * FROM `article` WHERE `id` < 470088 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000994s ]
  14. SELECT * FROM `article` WHERE `id` < 470088 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000800s ]
  15. SELECT * FROM `article` WHERE `id` < 470088 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001084s ]
0.082389s