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本文从以下几个角度介绍。

    1、2024天河区高三二模化学
    2、2024天河区化学一模
    3、天河区化学二模
    4、天河区期末考试2024高二
    5、2024天河区二模初三化学答案
    6、2024广州市天河区二模化学
    7、2024天河区二模化学初三
    8、2024天河区化学一模
    9、2024天河区高三二模
    10、天河区2024一模化学

5、2025届天河区高中毕业班综合测试(三)政治试题


1、2025届天河区高中毕业班综合测试(三)化学试题


第二节（满分25分）
阅读下面材料, 根据其内容和所给段落开头语续写两段, 使之构成一篇完整的短文。
The afternoon sunlight streamed through laboratory windows as Emily and Liam adjusted their safety goggles. Their chemistry teacher Mr. Wilson had challenged the class to design an original experiment exploring reaction rates - a frequent topic in recent national college entrance exams.
"Let's test how catalyst(催化剂) concentration affects hydrogen peroxide decomposition," Liam suggested, arranging test tubes containing different manganese dioxide concentrations. Emily carefully measured 10ml H and O for each trial, her lab notebook open to a neatly drawn data table.
During their third trial, something unexpected occurred. The reaction in Tube C suddenly accelerated violently, spewing foamy bubbles over the bench. "The 0.5% catalyst solution shouldn't cause this!" Emily exclaimed, grabbing paper towels. Liam checked their labels and froze - they'd accidentally used 5% concentration in Tube C.
Mr. Wilson approached, observing their flustered cleanup. "Mistakes can be valuable if analyzed properly. Document everything you've observed." His words reminded Emily of last year's Gaokao question about experimental error analysis.
Reviewing their notes, Liam noticed inconsistent timing records. "We rushed the measurements after the first successful trials," he admitted. Emily bit her lip, recalling textbook principles about controlled variables. The clock showed only 25 minutes remaining in class.


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5、2025届天河区高中毕业班综合测试(三)地理试题


2、2025届天河区高中毕业班综合测试(三) 试题


6、2025届天河区高中毕业班综合测试(三)政治试题


6、2025届天河区高中毕业班综合测试(三)英语试题


5、2025届天河区高中毕业班综合测试(三)化学试题


5、2025届天河区高中毕业班综合测试(三)地理试题


A. 的溶解度曲线为曲线
B. 降温可使的饱和溶液变浑浊
C. 时，、的饱和溶液质量相等，则溶剂质量
D. 的饱和溶液从降温到，溶质的质量分数变大
12. 要完成下列变化，通过盐酸一步反应就能实现的是
① ② ③ ④
A. ①② B. ②③ C. ③④ D. ①③


（2）负
（3）带火星的木条；2.5
（4）；分解反应
（5）电；化学
（6）2；H、O
【知识点】电解水实验；物理变化、化学变化的特点及其判别
【解析】【解答】（1）图甲中水蒸发，过程中只是状态的改变，没有生成新物质，发生的是物理变化；


3、2025届天河区高中毕业班综合测试(三)生物答案