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试题答案

本文从以下几个角度介绍。

    1、2024汕头二模化学
    2、汕头二模2024
    3、2024汕头高考二模试卷
    4、21汕头市高考二模时间
    5、汕头市高三二模试卷
    6、2024年汕头高三二模化学
    7、汕头市高考二模2024
    8、2024高考汕头二模化学答案
    9、汕头2024二模
    10、汕头市二模2024

5、2025年汕头市普通高考第二次模拟考试(汕头二模)政治试题


3、2025年汕头市普通高考第二次模拟考试(汕头二模)化学试题


B．Why is Atlay so popular
C．A successful TV show: To the Wonder
D．A popular TV show turns Altay into a more popular destination
Though oceans cover about 71 percent of the earth’s surface, there’s still a lot we don’t know about them. We only know about 20 percent of the seafloor and the remaining 80 percent is still a secret to us. Some scientists even think that humans haven’t yet discovered (发现) 91 percent of sea animals.
So why do we know so little about the deep sea Well, getting to those depths (深处) is very difficult. It requires quite high technology. People built the first navigable submarine (可航行的潜水艇) in 1620, but it couldn’t go more than five meters below the surface. In fact, for a long time many scientists didn’t even think that there could be any life at depths greater than 550 meters. They also didn’t see much need to explore (探索) the deep sea. However, this changed in 1862. With the help of a digging machine, scientists discovered life as far down as 945 meters below sea level. Ten years later, they discovered around 4,700 species (物种) unknown before from the ocean floor.
Since then, people began to develop high technology to help explore the deep sea, including satellites (卫星). But why is it so difficult to explore the deep sea Well, at greater depths it is freezing (极冷的), everything is completely dark, and the pressure (压力) can be very great.
Though we have the difficulties, it’s important to understand the seas. They help control (控制) the earth’s temperature and produce half of the oxygen in the air. They can also provide us with information about climate change. For our future, we have to really understand what is ongoing below the surface.


B
Time passed. There was plenty of food and no work in the Southland, and White Fang lived fat and happy.
Except for Collie, all things went well for him. He learned how to laugh, and how to play at fighting with his
master without really biting him. When Scott, his master rode his horse, White Fang went with him. He never got
tired, because he ran like a wolf.
Once, when they were out riding, a rabbit frightened the horse, and his master fell and broke his leg.
“Home! Go home!” said his master, when he understood he was hurt. White Fang didn’t want to leave him.


3、2025年汕头市普通高考第二次模拟 (汕头二模)政治答案


5、2025年汕头市普通高考第二次模拟考试(汕头二模)物理答案


1、2025年汕头市普通高考第二次模拟考试(汕头二模)历史答案


5、2025年汕头市普通高考第二次模拟考试(汕头二模)化学答案


5、2025年汕头市普通高考第二次模拟考试(汕头二模) 试题


3、2025年汕头市普通高考第二次模拟考试(汕头二模)生物学答案


3亿人都在用的扫描A

①硫酸 ②醋酸 ③氧气
(4)向40g溶质的质量分数为20%的E溶液中通入少量CO2，使E溶液部分变质，充分反应后将溶液蒸干，得到8.65g固体，则变质的E占变质前E的质量分数为 。
【答案】(1) Ca（OH）2 Na2CO3 (2)CaCO3CaO+CO2↑ (3)① (4)25%
【分析】图1中的A~F六种物质中的B~F五种物质均能与A反应，且具有以下转化关系：B→C→D→E→F→B，其中C、E分别与水混合后均会放热，D可用于改良酸性土壤，则D为氢氧化钙（碱），F可用于制造玻璃，则F为碳酸钠（盐）。根据图2六种物质分类，B和F（碳酸钠）均属于盐，D（氢氧化钙）和E均属于碱，E溶于水放热，则E为氢氧化钠，A能与碱、盐反应，则A为酸，C溶于水也会放热，则C为氧化钙（氧化物），F（碳酸钠）能转化为B，，B能转化为C（氧化钙），碳酸钠和氢氧化钙反应生成碳酸钙沉淀和氢氧化钠，碳酸钙高温分解生成氧化钙和二氧化碳，则B为碳酸钙，代入验证，推论合理。
【详解】（1）D为氢氧化钙，化学式为Ca(OH)2；F为碳酸钠，化学式为Na2CO3；
（2）B转化为C，即为碳酸钙高温分解生成氧化钙和二氧化碳，化学方程式为：；
（3）由分析可知，A为酸，且A为无机化合物，则A不可能为醋酸（醋酸是含有碳元素的化合物，属于有机物），则A可能为硫酸，故选①；


3、2025年汕头市普通高考第二次模拟考试(汕头二模)生物答案