Look for the promotional slogan Fight the Blizzard 30

Hehe! Ay.

People now.

There are very few hearts that help others anymore !

During the Spring Festival holiday, the Internet, like newspapers, television, radio and other traditions, has become an important platform for people to understand the disaster situation and express their love. In the past few days, many netizens have left messages on the Internet, or through blogs, podcasts and other emerging technologies, in the form of text, **, **, etc., witnessing and recording the moving scenes and pictures in the fight against the snow disaster, leaving them with a lot of emotion, feelings, feelings, and ......

There were tears in my eyes, and I tasted the emotion of the merciless people in the heavy snow. I know in my heart that with such a good leader, how can the motherland not be strong; As long as we show the spirit of unity, courage, and unity in the face of the snow disaster, how can the motherland not prosper. ——A netizen of Xinhuanet.

When a crisis comes, the grassroots are heroes; At the head of the disaster, the little people are the mainstay. 10 **, the freeze frame is just a drop in the ocean, a glimpse, but it conveys the moving that is heavier than Mount Tai. When these emotions flow into rivers and rivers and seas, all the ice will melt. ——A netizen on Sina.com.

When a blizzard strikes, we may think it's just a natural disaster, and the workers who brave the dangers to climb the transmission towers are just doing their jobs. But the sacrifices of the three martyrs Luo Haiwen, Luo Changming, and Zhou Jinghua tell us that this is a war without gunpowder. In order to ensure the electricity consumption of the people and enterprises, so that everyone can have a good year, countless power workers move forward bravely and are not afraid of hardships and dangers.

Without their contributions, the interests of the country and the people will not be guaranteed. Let us remember the monuments that stand on the elevated towers in the snowstorm, they make you and me extremely relieved, and the country is extremely relieved. ——Jiangxi Normal University Ye Sai Blog.

This song is so well written, I hope it will be popular. A nation that is calm in the face of danger must be a great nation that is invincible. "Let love come home, nothing is impossible; Ice and snow can block this journey, but it can't hide the eyes of love; Home is the one who reaches out in times of trouble, and you are my family ......"The lyrics are so touching.

An easy-net netizen left a message: "Behind the 10 classics ** and 10 touching stories are the spirit and strength of 1.3 billion Chinese, and the determination and courage to overcome natural disasters." Nothing can stump us, we can definitely win. ”

A Sina netizen said: "After reading these ** with tears, I was not only moved, but also distressed." From the prime minister to the people's soldiers, as well as the ordinary people who are fighting on the front line, they are all good, and they will all be respected and loved by the people.

Good people, take our actions, stretch out our warm hands, and do what we can to help those in need. ”

A netizen who is abroad said: "Although I have not experienced this snow disaster abroad, I feel the same way when I see these, I want to say that although natural disasters are unpredictable, as long as everyone is united and united, what difficulties we can't solve!" ”

Resistant to snow disasters.

Snow devils are wreaking havoc in the south of the Yangtze River, and the whole country is fighting for rescue.

Xiangxin talked about Guangdong's anti-ice and heroic soldiers, and Su Anhui praised the heroes.

The central body is sympathetic and warm, and all people love to thaw the tundra.

Overcome serious disasters and respond together, and help the poor and create a new day.

Snow clearing. The snow and ice are not afraid of the cold, bend over and raise their arms to dance the silver shovel.

Clear the roadblocks and clear the road, and enjoy the sweet heart of watching the traffic.

Full of red rivers. Hot snow melts ice.

The blizzard is repeated, the year is cold, and the ice is so cold that the frost is miserable. Looking at the southern country, the sky is frozen, and the road is closed. In the past 50 years, there has been no disaster, and one side is in trouble.

To ensure smooth traffic, the will has become a city, and the military and civilian forces. In the middle of winter, the wind is cold; The electric pole is covered, and the hearts of the people are strong. Air rescue, strong and super-easy.

At a critical juncture, be wise, break friends and be proud. Look at Shenzhou, how can you be an enemy?

Sweeping snow and ice are not afraid of the cold, bending over and raising their arms to dance the silver shovel.

Clear the roadblocks and clear the road, and enjoy the sweet heart of watching the traffic.

Full of red rivers. Hot snow melts ice.

Blizzards are repeated, the years are cold, and the frost is severe. Looking at the southern country, the sky is frozen, and the road is closed. In the past 50 years, there has been no disaster, and one side has difficulties in all directions.

To ensure smooth traffic, the will has become a city, and the military and civilian forces. In the middle of winter, the wind rises; The electric pole is covered, and the hearts of the people are strong. Air rescue, strong and super-easy.

At a critical juncture, be wise, break the luck, and be heroic. Look at the oak laughing luck in Shenzhou, the upper and lower exorcisms, how can they be enemies.

Snow devils are wreaking havoc in the south of the Yangtze River, and the whole country is fighting for rescue.

The old man of Hunan and Guangdong regretted the courage to resist the ice and praise the hero, and Su Anhui rescued and praised the heroes.

The central sympathy is warm, and the love of all people thaws the tundra.

Overcome serious disasters and respond together, and help the poor and create a new day.

Sodium carbonate, magnesium chloride, copper sulfate, and sodium chloride are all soluble in water, but copper sulfate is blue when dissolved in aqueous solution, and it is dissolved in water to obtain a colorless solution, so copper sulfate is excluded; Sodium carbonate, magnesium chloride, sodium chloride only sodium carbonate and dilute sulfuric acid reaction, the reaction to produce sodium sulfate and carbon dioxide, because there is no phenomenon after adding dilute sulfuric acid, so it does not contain sodium carbonate, and then add sodium hydroxide, magnesium chloride reacts with it to produce precipitation, sodium chloride does not react, and the appearance of white precipitation proves that there must be magnesium chloride and may have sodium chloride; Because the substance containing sodium will produce a yellow flame when it is burned on the flame of the alcohol lamp, it is verified whether it contains sodium chloride Experimental operation: take a small amount of snow melting agent and burn it on the alcohol lamp, if a yellow flame is generated, it proves that it contains sodium chloride Magnesium chloride can pollute the environment, and questions (1) and (2) can also be answered

So the answer is: experimental operation.

Experimental phenomenon. Conclusion: Copper sulfate.

Does not contain sodium carbonate.

Contains magnesium chloride.

Take a small amount of snow melting agent and burn it on the flame of an alcohol lamp.

Produces a yellow flame.

1) MgCl2 + 2NaOH = Mg(OH)2 + 2NaOH (2) pollutes water, pollutes soil, etc.

The name of this movie is "Snow Song".

Snow songs, Daoban and passengers, camel people, truck drivers, etc., show the light of humanity in front of the snowstorm!

It should be the Wind and Snow Wolf Road, I've seen it.

To put it simply, the fight against the snowstorm reflects the unity and unity of the Chinese people and **** in the face of sudden disasters. The enlightenment of the success of the disaster fight is that we must carry forward the spirit of unity and support from all sides in times of difficulty.

From a political point of view, we have successfully fought the blizzard because we are a socialist country, and our country represents the interests of the people, is anxious about what the masses are anxious about, is willing to do what the masses think, is selfless, and serves the people wholeheartedly. The inspiration of touching deeds to us: our society is a friendly and harmonious society, with a healthy spiritual civilization.

As teenagers, in addition to studying hard, we must also learn the kindness and sincerity of the Chinese embodied in these selfless people.

That's probably it, I'm a freshman in high school, and I've always made up politics when I write about it. You add a little bit more content to my answer, and that's basically it.

When writing political questions, we should proceed from reality, and in the end, we must return to textbooks.

Of course, the occurrence of disasters also reflects the imperfection of China's current early warning mechanism, the inability of the masses to get information in a timely manner, the lack of disaster emergency education in China, and the lack of knowledge of what to do when disasters come. This paragraph, you look at it, write it or not, you make a decision.

The lesson of this snowstorm is to learn to be strong in the midst of difficulties

Politically, let's create a harmonious society.

Politically, it shows that it is now a ruling world, and it can be regarded as a prosperous era.

It embodies the spirit of people who are not afraid of disasters.

According to the flow chart of the title, it can be seen that the snow melting agent is added with water to form a colorless solution, indicating that there is no copper sulfate (the copper sulfate solution is blue) The addition of sodium hydroxide to the colorless solution produces a white precipitate, indicating that it contains magnesium chloride, because magnesium chloride and sodium hydroxide react into magnesium hydroxide (precipitation) and sodium chloride; Sodium chloride and silver nitrate to produce silver chloride (precipitate) and sodium nitrate; Because sodium chloride is generated in the second step, it is impossible to determine whether the snow melting agent contains sodium chloride; Sodium nitrate has nothing to do with the flow chart, so it cannot be concluded Therefore, the substance that must be contained is magnesium chloride, and the substance that must not be contained is copper sulfate, and the other two cannot be determined So the answer is:

cuso4；If there is copper sulfate, the solution is blue

MgCl2, NaCl (reasonable).

The principle of snow melting of "chloride salt" snow melting agent is: after the "chloride salt" snow melting agent is dissolved in water (snow), its freezing point is at zero degrees, for example, sodium chloride (the main component of table salt) dissolved in water after the freezing point is -10, calcium chloride is about -20, and acetic acid can reach about -30 In addition to the dissolution of salts, there is also a role that the freezing point of salt water is low, so it is difficult to form ice cubes after dissolving salt in snow water Therefore, the answer is: reduce the freezing point of water