On October5, Tu Youyou, 84, became the first Chinese to win a Nobel Prize in natural science. She is only the12th woman in history to be awarded the honor.

    Tu was born in Ningbo, Zhejiang, China on 30 December 1930. She once studied at Xiaoshi Middle School and Ningbo Middle School. Her teacher said that Tu liked reading books and she was very hard-working. From 1951 to 1955, she attended Beijing Medical College. Later Tu was trained for two and a half years in traditional Chinese medicine.

    Tu was given the award for her discovery of artemisinin(青蒿素), which has been developed to fight against malaria(疟疾). When Tu started her search in the late 1960s, over 240,000 compounds(化合物) around the world had already been tested, without any success. Her interest in traditional Chinese medicine drew her to ancient texts and finally found the sweet wormwood(青蒿),which had been used to treat malaria in China around 400 A.D. After more than190 failures, she invented the right drug in 1971.

    Tu Youyou doesn't have a Ph.D., neither has she ever studied or worked overseas. One former colleague, Liao Fuming, who has worked with Tu for more than 40 years, describes her as a "tough and stubborn(固执) woman."

    Tu is stubborn enough to spend many years putting ancient texts together and use them in modern scientific practices. The result is millions of lives saved.

    "She has done wonderful contribution to the world with her work, she really deserves it! It's a blessing for the Chinese people, as it is for the world!" Mats Wahlgren, member of the Nobel Assembly said.

By Anna Matteo

28 January, 2019

    A 3-year-old boy who was lost in the woods for two days is now safe at home with his family. But Casey Hathaway told his rescuers (救援者) that he was not alone in the rainy, freezing cold woods. He said he was with a friend — a bear.

    The child went missing on January 22 while playing with friends near his grandmother's house in North Carolina. When the other children returned but Casey did not, the family searched the area for almost an hour before calling the police.

    Police formed a search team to look for the young boy in the nearby woods. But two days went by and—no Casey.

    Then on January 24, someone called the police saying he heard a child crying in the woods. Police followed up on the information and found Casey at about 9:30 that night. He was in good health.

    Casey told the rescuers he had hung out with a black bear for two days, a bear he called his "friend".

    The police officer Chip Hughes spoke with reporters from several news agencies. He said Casey did not say how he could survive in the woods for two days in the cold, rainy weather. "However," the police officer said, "he did say he had a friend in the woods that was a bear with him."

    Hundreds of people helped in the search and rescue efforts, including some 600 volunteers, police and members of the army. Doctors at the medical center gave Casey some examination. He was then sent to his family on January 25.

    His mother talked with reporters and thanked everyone who joined the search for her son. "We just want to tell everybody that we're very thankful that you took the time out to search for Casey," said his mother. "He is up and talking He's already asked to watch cartoons."

A Chemical reactions(化学反应)make for some great experiments.You can make use of the CO₂ (carbon dioxide) given of by a baking soda and lemon Juice reaction to blow up your balloon! 

What you'll need:

★Balloon 

★About 40 ml of water (a cup is about 250 ml so you don't need much) 

★Soft drink bottle ★Juice from a lemon 

★1 teaspoon of baking soda Instructions: 

★Before you begin, make sure that you pull the balloon long to make it as easy as possible to blow up. 

★Put the 40 ml of water into the soft drink bottle. 

★Add the baking soda and mix it with water. 

★Put the lemon juice in and quickly put the balloon over the mouth of the bottle. 

What's happening?

If all goes well, then your balloon should inflate(膨胀)! Adding the lemon juice to the baking soda creates a chemical reaction and produces CO₂. The gas rises up and escapes through the soft drink bottle. It doesn't, however, escape the balloon, pushing it outwards and blowing it up. 

Even though African elephants are protected, many of them are still being killed for their ivory.

At the end of the 1970s, over 1.3 million elephants walked around Africa, but today, their numbers have fallen to around 450,000. This is mainly caused by illegal(非法的) hunting for ivory. Need for ivory in markets, especially in Asia and Africa, continues to push the illegal trade. This has resulted in the deaths of at least 20,000 African elephants each year.

Ivory, also known as "white gold", has long been considered valuable. Its unusual look has led to its use in lots of expensive things, including jewellery, musical instruments and art. And the ivory material itself can stand the test of time. So many people are willing to pay a high price for ivory products.

However, no matter how much real ivory is sold for, it's certainly not worth the harm to elephants. That's why some scientists are working to achieve the same beauty of ivory without killing any animals.

Thaddaa Rath and her team at the University of Vienna have created the ivory called "Digory". The high-tech ivory is made from synthetic resin(合成树脂) and calcium phosphate particles(磷酸钙颗粒). It's first formed into the shape by a 3D printer. And then it is color-matched and colored. Next, it is polished(抛光) to make it look like real natural ivory.

Although Digory looks so real that it is hard to tell it from real ivory, its chemical structure is completely different from that of the real one. Fritz Vollrath, a biologist who is against killing elephants for ivory, felt excited about the invention and spoke highly of it for the fact that Digory could save many elephants from risks. Scientists have made some achievements, but we still need to do more research to make sure that it is widely used. It's still hopeful that scientists can be able to protect African elephants by making high-tech materials to take the place of the real ivory.

假如你是Lily, 学校英语兴趣小组正在举办以"My good friend"为主题的征文比赛。请 你依据以下内容提示写一篇英语短文，介绍一下你朋友Gina。

注意：

1. 可在思维导图内容提示的基础上适当扩展信息。

2. 不能照抄原文；不得在作文中出现真实校名、地名和考生的真实姓名。 

3. 语句连贯，词数不少于70词。作文的开头已经给出，不计入总词数。

Hello, everyone! Let me introduce my friend Gina to you.