1. English listening essay training materials
yogurt
When you open a yogurt container, you will often see liquid gathering on it. Some people mix it back into yogurt, and some people drain it. What is it and where does it come from?
When you open a box of yogurt, you will often find a layer of liquid floating on the surface. Some people mix it into yogurt, and some people pour this liquid out. What is this liquid and where does it come from?
In order to solve the mystery of liquid in yogurt, let's go back a few steps and go back to the fact that yogurt is made of milk. There are two different types of protein in milk. Most protein is casein, and the rest is whey protein-curd and whey protein.
In order to uncover the mystery of this liquid in yogurt, let's look back at the raw material for making yogurt-milk. There are two different types of protein in milk. Protein is mostly casein, and the rest is whey protein, including clots and whey.
If you look at a glass of milk, you can't tell casein from whey. But this situation changed when special bacteria were added to milk to make yogurt. Yogurt-producing bacteria ferment sugar in milk and produce an acid. As a result, the acidity of the mixture is stronger than before, and this stronger acidity makes casein coagulate. On the other hand, whey protein does not coagulate and is separated from casein in liquid form.
We can't distinguish casein from whey just by observing a glass of milk. But when special bacteria are added to milk to make yogurt, the situation is different. Bacteria used to make yogurt ferment sugar in milk and turn it into acid. So the acidity of the mixture is stronger than before, and the higher acidity makes casein coagulate. On the other hand, whey protein does not coagulate, but is separated from casein in liquid form.
The yogurt you buy in the store has a stabilizer, usually fruit pectin, to keep the solid casein and liquid whey mixed together. But some whey will still be separated from casein, which is what you see when you open the yogurt container.
The yogurt you bought in the supermarket contains a stabilizer, usually pectin, which is used to mix solid casein with liquid whey. However, some whey is still separated from casein, which is the liquid you see when you open the yogurt package.
Whey contains not only protein, but also B vitamins, including riboflavin, nicotinic acid and thiamine, which are not found in the solid part of yogurt. Because of the nutritional value of whey, your best way is to mix it into yogurt and eat it down!
Whey contains not only protein, but also vitamin B. Vitamin B includes riboflavin, nicotinic acid and sulfur, which are not available in the solid part of yogurt. Because of the nutritional value of whey, your choice is to mix it with yogurt and drink it all at once!
2. English listening essay training materials
The history of smallpox
In Shakespeare's time, wishing someone had acne was a terrible curse. In London in the17th century, 10% of the population died of smallpox, which is a virus that is easily spread by airborne particles or contaminated clothes. Infection begins with fever, pain, sneezing and nausea. Soon a red rash appeared, usually covered with dripping scabs on the skin. Although some people recover, people may be blind, deaf or leave serious scars because of smallpox.
In Shakespeare's time, it was very vicious to curse others for smallpox. In London in the17th century, 10% people died of smallpox, a terrible disease that can be spread through the air and contaminated clothes. The precursor symptoms of infected patients are fever, pain, sneezing and nausea. Red maculopapules appear quickly and then usually develop into scabs on the skin. Although some people get well, they will be deaf, blind or leave deep scars.
Doctors tried to treat smallpox with sheep manure or gold needles, but to no avail. But farmers in Europe and traditional doctors in Africa and Asia have found that exposure to a very small amount of virus can provide some protection.
Physicians at that time tried to help treat smallpox with sheep manure or gold needles, but failed. However, farmers in Europe and traditional doctors in Africa and Asia have found that infection with a very small amount of smallpox virus will bring certain immune effects to the human body.
Traditional therapists inoculate skin scratches with a small amount of pus infected with smallpox. About one person in every 200 people dies in this process, but most people are mild and will recover in a few days. In this process, they gained immunity to diseases.
Traditional doctors vaccinate normal people by injecting a small amount of pus from smallpox patients. The mortality rate of this treatment is one in two hundred, but most people have mild symptoms and will recover within a few days. In this process, they gained immunity to smallpox virus.
Because smallpox vaccination exposes people to such a small dose of virus, it causes much less death than the natural spread of the disease. Nevertheless, doctors in London are skeptical about what farmers or traditional therapists do. It was not until the fashionable Lady Mary Wortley Montagu came back from Turkey that it became popular in high society.
Because the dose of virus used in smallpox vaccination is very small, the death caused by smallpox is insignificant compared with the natural spread of smallpox. However, doctors in London are still skeptical about this treatment method of farmers and traditional doctors. Until Mary? Waltley. After montague came back from Turkey, this kind of treatment became popular in the upper class.
Observing Turkish doctors, Ms. Mary asked her son to get vaccinated in London and published a booklet explaining the procedure. Soon, even physicians found that vaccination gave people a better chance of contracting mild smallpox and avoided many deaths.
By observing the treatment methods of Turkish doctors, Mrs. Mary vaccinated her son and published a booklet in London to explain the treatment process. Soon, even those physicians noticed that this inoculation method would only cause slight symptoms of smallpox, thus saving many lives.
3. English listening essay training materials
Virtual school
In the past academic year, 42 of the 50 states in the United States provided some kind of public online learning. One state, Michigan, now requires all students to have an online learning experience before graduating from high school.
In the past academic year, 42 of the 50 states in the United States provided some form of public online learning. Now, Michigan requires all students to have online learning experience before graduating from high school.
Since the rise of Internet in 1990s, even the concept of school has changed.
Since the rise of Internet in 1990s, the concept of school has even changed.
A new report from the Center for Evaluation and Education Policy of Indiana University says that 18 states have full-time virtual schools. There are no buildings. All courses are online.
A new report from the Center for Evaluation and Education Policy of Indiana University says that 65,438+08 states have full-time virtual schools, no school buildings, and all courses are studied online.
Online learners may work at different times. But there may be fixed class discussion time-through text, voice or video-and teachers' virtual office hours.
Online universities can study at different times, but class discussions must be held at fixed times-via SMS, audio or video-and teachers have fixed virtual working hours.
1997, Flo Fei Da opened the first statewide public virtual school in the United States.
1997, Florida opened the first statewide virtual school in the United States.
Today, Florida Virtual School offers more than 90 courses. As of1February, there are 56,000 students registered. Almost 60% are women. The school website says that each student has registered for two classes on average.
Today, Florida Virtual School offers more than 90 courses. By the end of 65438+February, 56000 students had enrolled, nearly 60% of whom were women. According to the school website, each student takes two classes on average.
Two thirds of the students also attend public or charter schools. Charter schools are privately run with public funds. Other students go to school at home or in private schools.
Two thirds of the students also study in public schools or government charter schools. Government charter schools are privately run, but funded by the public. Other students are educated at home or in private schools.
The Florida Virtual School has now opened the Florida Virtual Global School. Students from other countries pay for classes. Janet Hagen teaches English. She lives in Indianapolis, Indiana. Her students live in distant Africa and Japan.
The Florida Virtual School has now opened the Florida Virtual Global School. Students from other countries pay for study. Janet Haijing is a teacher in an English class. She lives in Indianapolis, Indiana. Her students are as far away as Africa and even Japan.
So how good is the virtual school? As the new report from Indiana University points out, students show mixed results.
So, what is a virtual school like? The report from Indiana University points out that research shows that the level of schools is uneven.
For example, students in Florida Virtual School get higher scores than those who study the same course in the traditional way. They scored higher on statewide tests.
For example, students in Florida Virtual School get higher scores than students who study the same courses in the traditional way. They also scored higher on statewide exams.
But students in virtual schools in Kansas and Colorado have lower test scores or worse performance than traditional learners.
However, students in virtual schools in Kansas and Colorado scored lower and performed worse than traditional students.
Education experts say the mixed results show that more research is needed to find the best way to teach in virtual schools. At the same time, they say that education schools need to train more teachers to work in physical and virtual classrooms.
Education experts say these mixed results show that more research is needed to discover new teaching methods in virtual schools. At the same time, they say, education schools need to train more teachers who can teach in physical and virtual classes.
4. English listening essay training materials
Elizabeth Taylor.
Legendary Hollywood actress Elizabeth Taylor has died at the age of 79. Taylor's family issued a statement saying that she died peacefully and her children were with her. This experienced actress is famous for her films "National Velvet" and "Cleopatra", which made her a star at the age of 12. She has been suffering from congestive heart failure. She has been hospitalized in Los Angeles for the past six weeks.
Legendary Hollywood actress Elizabeth Taylor has died at the age of 79. Taylor's family issued a statement saying that she died peacefully and her children were with her. In the past six weeks, the experienced actress was hospitalized in a hospital in Los Angeles for congestive heart failure. She is famous for starring in national velvet and Cleopatra. The movie National Velvet Gentelle became a star at the age of 12.
Taylor won an Oscar for her role in Who's Afraid of Virginia Woolf and butterfield 8. In the following years, she was the spokesperson for humanitarian cause, especially AIDS research. That work won her a special Oscar for 1993.
Taylor's movie Who's Afraid of Virginia wolf? "and" brothel * "won the Oscar. She later served as a spokesperson for humanitarian cause, especially AIDS research. Her contribution in this field won the 1993 Oscar Special Award.
Taylor is sometimes called the most beautiful woman in the world. In addition to her film work, the Oscar-winning actress is also famous for her off-screen plays, including eight marriages, including two with actress richard burton.
Taylor is called "the most beautiful woman in the world". Besides acting in movies, the Oscar-winning actress is also widely known for her dramatic off-screen experiences, including eight marriages, including two with actress richard burton.
Born in London to American parents, she moved to Los Angeles before World War II, from child star to Hollywood star to movie idol. But the attention she received was not only her beauty and acting talent. Her rich personal life and numerous marriages, as well as her friendship with pop idol Michael Jackson, make her a continuous source of media reports.
Taylor was born in London to American parents. She moved to Los Angeles before World War II, from a child star to a Hollywood movie star, and finally became an idol in the film industry. But she attracts people's attention not only because of her beauty and acting talent. Her bumpy personal experience, numerous marriages and her friendship with pop star Michael Jackson made her the target of media reports.
She loves jewelry and jewelry, and has launched her own perfume, including a perfume called "White Diamond". In the following years, her charity work was widely recognized. France awarded her the famous Legion of Honor on 1987, and Queen Elizabeth made her a dame in 2000, equivalent to a female knight.
Taylor loves jewelry and founded his own perfume brand, one of which is called "White Diamond". In her later career, Taylor's charity work was widely recognized. France awarded her the Medal of Honor on 1987. Queen Elizabeth of England made her a knighthood in 2000, which is equivalent to a knighthood.
5. English listening essay training materials
Calling for education for the aged
According to a new study on population recently published, if the elderly want to contribute to the society instead of becoming a financial burden, they must have more learning opportunities.
According to a new population research report published recently, if the elderly want to stop being a burden to society and continue to exert their surplus heat, they must be given more learning opportunities.
According to the report, the current methods of focusing on young people and professional killers are not enough to meet the challenges of demographic changes. At present, only 1% of the education budget is spent on the oldest third of the population.
According to the report, the current education methods tend to be young people and vocational skills, and it is difficult to meet the challenges of demographic changes. The elderly, who account for one third of the total population, account for only one percent of the education budget.
Challenges include that most people are expected to spend one-third of their lives after retirement, and now there are more people over 59 than those under 65,438+06, and 65,438+06,5438+06,300,000 people are over the age of receiving state pensions.
These challenges include: most people will spend a third of their lives after retirement; The number of people over 59 years old is higher than1the number of people under 6 years old; 11300,000 people have reached the national legal retirement age.
"Learning needs to run through life. Professor Stephen mcnair, the author of the report, said: "Our historical policy concern for young people and the concentration of resources can no longer meet the new needs.
Professor Stephen McWeill, the author of the report, said: "Learning should run through the whole process of life. Our policy focus and resource allocation of 1000 yuan are more focused on young people and it is difficult to adapt to new needs. "
The main part of our education budget is spent on people under the age of 25. When people change their jobs, families, partners and lifestyles more than ever before, they need opportunities to learn at every age. For example, some people start a new career in their fifties or later.
Most of the education budget is spent on people under 25. When people change jobs, places of residence, life partners and lifestyles more frequently than before, people of all ages need opportunities to learn. For example, some people start their businesses in their fifties or later.
Mcnair said that people need the opportunity to have a "mid-life review" to adapt to the later stage of their careers and make plans for the transition to retirement. Now retirement may happen unpredictably at any time between the ages of 50 and 90.
People need a chance to "look back at middle age" to adapt to their future working life and plan their role change after retirement. This change can now take place in a long period of time from 50 to 90 years old.
There should be more money to support people to build a sense of identity and find a constructive role for the "third age"-the 20 years or more they will spend in a healthy retirement.
There should be more funds to ensure that people can establish their sense of identity and find a constructive role in the "third age group", that is, a healthy life for 20 years or more after retirement.