【推荐1】Open an app, place your order, and wait for your food to be delivered(配送) to your home— this is how many people eat in China these days. According to the latest data from the China Internet Network Information Center, 421 million Chinese people use online food delivery services.

That's equal to half of the total number of Internet users in China.

Which group of people is ordering food online the most? Unsurprisingly, it's mainly young   people. A recent report that was jointly (RRS) published by the China Hospitality Association and Meituan, food delivery service, showed that 86.3 percent of the service's users are between 20 and 34 years old. These people, who are more likely(可能的) to live in small families are the major force driving the development of the food delivery industry(行业).

Small families depend greatly on food delivery services. According to the National Bureau of Statistics(国家统计局), Chinese families have changed in size over the past decade. In 2002, only 7.7 percent of families were single-person households. But this number increased to 15.6 percent in 2017. The percentage of two-person families rose from 18.4 in 2002 to 27.2 in 2017. For small families, cooking is relatively(相对) more time and resource consuming(耗时耗材), so ordering food online has become more popular.

The improvement of China's food delivery services has also attracted more customers.   According to Meituan's report, the average time it takes to make a food delivery dropped from 38   minutes in 2016 to 29 minutes in 2019. Many delivery platforms are also offering more services,   delivering products such as fruit, vegetables, medicine and flowers. As its services continue to   improve, it's likely that the food delivery industry will keep growing.

【推荐3】Many children use the Internet to get useful knowledge and information, and to relax in their free time. But some of them are not using it in a good way. Here are some rules to make sure you are safe and have fun on the Internet.

Make rules for Internet use with your parents. For example, when and how long you can go online, and what activities you can do online.

Don’t give your password (密码) to anyone else, and never give out the following information—your real name, home address, age, school, phone number or other personal information.

Check with your parents before giving out a credit card (信用卡) number.

Never send a photo of yourself to someone in e-mail unless your parents say it’s OK.

Check with your parents before going into a chat room. Different chat rooms have different rules and attract different kinds of people. You and your parents will want to make sure it’s a right place for you.

Never agree to meet someone you met on the Internet without your parents’ permission (允许). Never meet anyone you met online alone.

Always remember that people online may not be who they say they are. Treat everyone online as a stranger.

If something you see or read online makes you uncomfortable, leave the site. Tell a parent or teacher right away.

Treat other people as you’d like to be treated. Never use bad language.

Remember—not everything you read on the Internet is true.

【推荐1】Artificial intelligence (AI) (人工智能) is the ability of a computer program or a machine to think and learn. It is also a field of study that tries to make computers "smart". John McCarthy, a scientist, came up with the name "artificial intelligence" in 1955. Many things such as learning and problem solving can be done by computers, though not in the same way as we do.

An unusual goal of AI research is to create computer programs that can learn, solve problems, and think logically. At present we use the term AI for successfully understanding human speech, recognizing (识别) human faces, operating self-driving cars and competing in some game systems like Chess and AlphGo (阿尔法狗). Some people also consider AI a danger to humans if it develops too quickly. Professor Stephen Hawking, a well-known British scientist, was not for this kind of technology.

Math is the basic language of AI. If we raise the standard in the learning of math, our students will be more likely to become successful AI designers in the future. We not only want bright students, but also need to attract average students and give them the math skills which are needed to change them into AI designers. Besides, a good knowledge of computer science is also necessary for AI designing.

Scientists hope to create creative and emotional AI which can possibly understand human feelings or create art. Many ways and tools have been tried to discover this fascinating field.

【推荐3】You wouldn’t steal a car. You would never rob (抢劫) a bank or pick someone’s pocket. But you may be another kind of thief.

If you have ever bought a disc for 15 yuan or less, then you have helped to rob artists or musicians of their intellectual properly rights (知识产权).

Last Thursday was World Intellectual Property Day. Activities to tell people about intellectual property rights were held around the country.

Intellectual property includes inventions, literary (文学的) and artistic works, names, and pictures. They are of little value (价值) if they are not read, seen and used.

While the cost of copying discs is very small, authors, singers and actors have to spend a lot of money and time making a new product. That’s why they have the right to make money from their work.

So buying pirated (盗版的) music of Jay Chou and Jolin Tsai is like stealing from them, paying them no respect for their hard work.

If Jay Chou cannot make money from his work, he may not make anything else. But those who make pirated goods are becoming rich without doing any hard work.

The authors should ask for a fair price for their work. Earlier this year there was much talk about how much KTV clubs should pay the music companies for using their songs.

The copyright fee (版权费) also should be fair to the users. That’s good for the music’s popularity and society as well.

【推荐1】We can’t clearly remember since when we started to take our mobile phones to a dinner table. This happens a lot, especially when we eat out. Once a dish comes, instead of lifting our chopsticks, we take out our mobile phones and click. Later, we post the photos onto WeChat, waiting to be “liked”. Then we check our mobile phones from time to time during the meal, to see whether we get “likes” or not. We may seem abstracted at dinner.

Does that sound familiar(熟悉的) to you? Do you do that often? If not, how do you feel when others do that when having dinner with you?

A recent study shows that what we are used to doing is not so good. Spending time taking photos of food makes the food less pleasant. To test this, some researchers did an experiment. Some people were asked to take photos before they could enjoy food. As a result, it showed that the more photos they took, ▲ . So, why not stop taking photos and just enjoy the food in front of you?

Besides the scientific result, there are also some other bad influences of taking photos of food before meals. After posting the photos onto the Internet, one will not be able to control himself and check his mobile phone many times. “Does everyone like my photos? I hope a lot of people like them!” It seems that your mobile phone secretly calls your name all the time, even when you are with real people. Also, others may think that you think your “likes” are more important, but they themselves less.

So, next time you go out to have dinner with your family or friends, how about not taking photos of food? Let the food be delicious as it is and share your life with people around you. Trust me, it will be a wonderful time.

【推荐2】Everyone wants to keep friendship for long. Then what do we do to keep friendship for a long time? Friendship is like a seed (种子). If all the conditions are right and you really look after it well, then you’ll have a strong plant. It will go on to grow bigger and better as time passes by. If it’s what you want, keep the advice in mind.

Spend time around people you’d like to be friends with, and join in with their plans. If you don’t agree with their plans, say no in a friendly way, “I like that idea but maybe we could…”

Be a good listener, so that others know that you’re really interested in what they’re saying.

Get to know people well by sharing “safe” ideas with them first. It might be something about TV shows or your favourite football team. It isn’t always safe to tell someone very personal things about yourself, like things you might be worried about or afraid of.

Be positive (乐观的)! Don’t feel sad about something terrible, and you should learn how to deal with sadness. Talk about the good things in your life. No one wants to be troubled by problems all the time.

The most important thing is that you have to be a good friend if you want a good friend.