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5、[百师联盟]2025~2026学年高一年级期中测试化学A试题


5．而教室后面有另一块黑板。
七、口语交际(共5小题；每小题2分，满分10分)
1.D 2.B 3.C 4.F 5.E
八、词汇考査(共10小题；每小题1分，满分10分)
用括号内所给词的适当形式填空。
1． sounds 2． sits 3．buildings 4．notices 5． teacher's
6． reading 7． are 8． exercises 9． having10．Yours


Scientist have worked out 138 our Sun will die. It won’t be any time soon. It will be in 10 billion years. 139 it clear, scientists from the University of Manchester in the UK worked for a long time. According to their 140 , in about 5 billion years from now, the Sun will turn into a “red giant”. This is the scientific name that is given to a star at the end of its life. When our Sun becomes a red giant, its center will turn much 141 . Its outside circle will expand (扩大) as far as Mars. This means Earth will be burnt and disappear. The scientists say no humans will be on Earth when the Sun 142 out. Humans will disappear in around one billion years from now.
The Sun is still quite young in space years. It is just 4.6 billion years old. This means it is only around one 143 into its lifespan (寿命). Professor Albert Zijlstra said when a star dies, its core (核) will appear. It 144 turns off and dies. Professor Zijlstra was happy that modern science can help us know the age of stars and what will happen to 145 . He said, “ 146 its help, we even have found out 147 of how the Sun dies out.”
阅读短文，从方框中选择适当的词或短语并用其正确形式填空，使短文通顺，意思完整，每词或短语限用一次。
it success quick send take off
On April 24, 2025, China achieved a great success! It launched (发射) the Shenzhou-20 spaceship. Three astronauts 148 to the orbiting (轨道) space station for a six-month mission.
The spaceship 149 from the Jiuquan Satellite Launch Center in the north-west of China. Just about 10 minutes after the launch, it separated from the rocket and got into 150 planned orbit. The China Manned Space Agency said the astronauts were fine and the launch was 151 .
6.5 hours later, the Shenzhou-20 152 met and connected with the Tiangong space station. The Shenzhou-20 crew (全体机组成员) took over from the Shenzhou-19 crew in space.


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以反应Ⅱ为主，可导致甲醇的
产率降低，D错误。
9.氨氮 废水造成水体富营养化，必须脱除才能排放，常用的方
法有化学沉淀法、氧化法等。
Ⅰ.化学沉淀法
（1）向含有氨氮的废水中添加和 ，发
生反应生成 沉淀，写出该反应的离子方程式：


【详解】（1）是弱酸，电离方程式为；根据电离常数的定义可知，其电离平衡常数表达式为：；电离常数只与温度有关，则若保持温度不变，随着NaOH溶液的滴入，的电离平衡常数将不变；
（2）溶液导电能力与离子浓度成正比，CH3COOH是弱电解质，溶液中离子浓度较小，加入NaOH后，溶液中离子浓度增大，溶液导电性增强；HCl是强电解质，随着NaOH溶液加入，溶液体积增大，导致溶液中离子浓度减小，溶液导电能力减弱，当完全反应式离子浓度最小，继续加入KOH溶液，离子浓度增大，溶液导电能力增强，根据图知，曲线②代表0.1 mol/L NaOH溶液滴定HCl溶液的滴定曲线；滴入的NaOH溶液体积在0～10mL内，曲线②产生变化的原因是：随着NaOH溶液滴入，盐酸中自由离子的浓度逐渐减小，故溶液的电导率逐渐减小，故答案为：盐酸；随着NaOH溶液滴入，盐酸中自由离子的浓度逐渐减小，故溶液的电导率逐渐减小；
（3）由图可知，B点电导率大，则其离子总浓度较大，故答案为：B；
（4）B点为盐酸和氢氧化钠恰好反应，是氯化钠溶液；C点为氯化钠和氢氧化钠的混合物，氢氧化钠会抑制水的电离，则水的电离程度较大的是B点。
29．(24-25上·浙江温州十校联合体·期中)室温下，水溶液中各含硫微粒物质的量分数随变化关系如下图[例如]。已知：，。
(1)在的溶液中，下列粒子浓度关系式正确的是______。
A．


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