河北省20252026学年高一年级阶段性联合测评数学试题于2025-09-24发布，目前免费查试卷答案网站已经汇总了河北省20252026学年高一年级阶段性联合测评数学试题的各科答案和试卷，更多试卷答案请关注免费查试卷答案网站。

试题答案

本文从以下几个角度介绍。

    河北省20252026学年高一年级阶段性联合测评数学试题

1、河北省2025-2026学年高一年级阶段性联合测评数学试题


6、河北省2025-2026学年高一年级阶段性联合测评数学试题


④People in the south make sausages.
⑤People clean the house.
A．②③④ B．①②⑤ C．②③⑤ D．①②③④
58．What does the underlined word “nutrition” in Paragraph 3 mean in Chinese
A．风味 B．色泽 C．谷物 D．营养
59．Why do people clean the house before the Chinese New Year according to the passage
A．Because their houses are dirty and need cleaning.


a. Only exercising once or twice a month. b. Hardly having breakfast.
c. Staying up late. d. Eating too much junk food.
A．a, b, c B．b, c, d C．a, b, d D．a, c, d
32．How long did David watch TV in the evening
A．For thirty minutes. B．For two hours. C．For sixty minutes. D．For three hours.
33．Why did David faint in the PE class
A．Because he didn’t drink water. B．Because he was too tired.


6、河北省2025-2026学年高一年级阶段性联合测评数学试题


3、河北省2025-2026学年高一年级阶段性联合测评数学试题


5、河北省2025-2026学年高一年级阶段性联合测评数学试题


6、河北省2025-2026学年高一年级阶段性联合测评数学试题


1、河北省2025-2026学年高一年级阶段性联合测评数学试题


6、河北省2025-2026学年高一年级阶段性联合测评数学试题


(2)ⅰ.吸氧　ⅱ.　还原　4CH3COOH+O2+4e- 2H2O+4CH3COO-(3分)
(3)反应放热,温度升高使气体压强增大(3分)
解析　(1)①作为对照实验,②中醋酸百分含量与①中不同,即②的实验目的是探究醋酸浓度的影响,则②中铁粉的质量也为2.0 g。
(2)t2 s时,容器中压强明显小于起始压强,说明锥形瓶中气体减少,发生了吸氧腐蚀,碳作正极,铁作负极,电子从负极移向正极;碳电极上氧气得到电子发生还原反应,电极反应式为4CH3COOH+O2+4e- 2H2O+4CH3COO-。
(3)反应放热,温度升高使锥形瓶中气体压强增大。
19.答案　(除注明外,每空2分)
(1)2H2O H2↑+H2O2(3分)


3、河北省2025-2026学年高一年级阶段性联合测评数学答案