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4、[鼎尖教育]2025-2026学年高三第六届逐梦星辰杯大联考政治试题


1、[鼎尖教育]2025-2026学年高三第六届逐梦星辰杯大联考生物试题


I have two big eyes.
I have a small nose.
I have a small mouth
And this is my foot.
V. Listen and choose.淘淘设计了机器人，听录音完成身体部位拼图，将序号A或B填入括号内。(12分)
1. Look, it has two heads.
2. It has a short leg.


阅读下面短文，根据要求完成下面各小题。
Two American astronauts, Butch Wilford and Sunita Williams, came back to the Earth in March 2025. They stayed in the space for 9 months. In such a long time, they must follow some special rules to keep them healthy.
In space, everything moves freely in the air. Astronauts must sleep in special bags that are tied to the wall. 3 If they don’t, they may move around and hit things. What’s more, they have to clean themselves with wet cloths because there is not much water in space.
4 The astronauts eat special food that doesn’t break into small pieces. Small pieces can fly around and break important things in the space station. They eat thin, round bread only for astronauts. They also need to drink lots of water to stay healthy.
Exercise is very important in space. Without the Earth pulling down on them, their muscles and bones (肌肉和骨骼) become weak. The astronauts must run for two hours every day on a special machine. They use belts to hold them in place while running. They also need to do yoga to keep their muscles strong.
These rules help the astronauts stay healthy while they wait to come home. Space is a hard place to live. Following these rules can also keep them safe.
45．How do the astronauts exercise every day in space


6、[鼎尖教育]2025-2026学年高三第六届逐梦星辰杯大联考数学试题


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4、[鼎尖教育]2025-2026学年高三第六届逐梦星辰杯大联考生物学试题


3、[鼎尖教育]2025-2026学年高三第六届逐梦星辰杯大联考物理试题


4、[鼎尖教育]2025-2026学年高三第六届逐梦星辰杯大联考历史试题


6、[鼎尖教育]2025-2026学年高三第六届逐梦星辰杯大联考英语试题


【答案】B
【知识点】物理变化、化学变化的特点及其判别
【解析】【解答】A：天然气燃烧生成新物质，属于化学变化，A错误。
B：霓虹灯通电发光，没有新物质生成，属于物理变化，B正确。
C：葡萄酿酒有新物质酒精生成，属于化学变化，C错误。
D：光合作用有新物质生成，属于化学变化，D错误。
【分析】本题考查物理变化与化学变化的判断。解题关键是看变化过程中是否有新物质生成。易错点是准确判断“新物质生成”，化学变化有新物质生成，物理变化无新物质生成。


C．常温下，将0.02的溶液100mL和0.02的溶液100mL混合，若忽略混合后溶液体积变化，则混合后的溶液中，c(OH- )==0.01mol/L，pH=12，C正确；
D．为更好地表示溶液的酸碱性，酸度的定义：AG=lg，则25℃时，0.10 HCl溶液中，c(H+)=0.10mol/L，c(OH- )=10-13mol/L，AG= lg=12，D不正确；
故选C。
7．（23-24上·江西吉安·期末）“火星上‘找’到水的影子”被《科学》杂志评为10大科技突破之一。某温度下，重水(D2O)的离子积，可以用pH一样的定义来规定。下列说法错误的是
A．重水是极弱的电解质，将金属Na加入重水中，重水的电离程度增大
B．该温度下，纯重水的
C．该温度下，1 L含0.01 mol DCl的重水溶液，其pD=2


3、[鼎尖教育]2025-2026学年高三第六届逐梦星辰杯大联考化学答案