【推荐3】Chinese people are eating too much salt. On average, people in China eat about 10.5 grams of salt each day, much higher than the 6 grams recommended（建议）by Chinese Dietary Guidelines（2016）. China now has one of the highest salt intakes in the world. To fix this, China issued the first salt reduction guide for its food industry on April 18, 2018, People’s Daily reported.

If the guide is followed properly, the average salt intake for Chinese people will drop by 20 percent by 2030. The guide calls for food companies to lower the salt content in their products by improving their production techniques（技术）and changing flavors（滋味）.

The salt we take is mainly comes from processed（加工的）food. For example, a 104-gram can of Lay’s classic potato chips contains about 0.66 grams of salt, which accounts for over 10 percent of the recommended daily salt intake.

A small amount of salt makes food taste better and is important for good health, but eating too much increases the risk of high blood pressure, Xinhua reported.

Less salt leads to better health. And there’s no need to worry that food will be less tasty in the future. A study by the Monell Chemical Senses Center in the United States found that it’s easy for people to reduce their salt intake. Although you may think your food is not salty enough at first, your taste buds（味蕾）will gradually get used to it and you will feel that your food tastes the same as it did before.

    1     Some people climbed the highest mountains; some traveled into unknown parts of the world; some sailed small boats across the largest sea. Now some people begin to look for new excitement.

Bungee jumping (蹦极) is quite a dangerous sport. It only lasts for a few minutes or even seconds. You jump from a high place.     2     Usually, there is a rubber band (橡胶带子) tied to your legs. When you jump down, the rubber band pulls you up. About 2,000,000 people around the world have tried bungee jumping.

    3     Some scientists say that it is because modern life has become safe and it is not interesting. In the past, people lived in danger. They had to go out and look for food.     4    

Now, people live and work in safe places, buy food in shops. And there are doctors and hospitals to look after them if they become ill.     5    

【推荐2】In the world today, all of the people need to have fun when they are free. We can’t work all the time if we are going to keep healthy and enjoy life.

Everyone has his own way of relaxing: Perhaps the most popular form is to take part in sports. There are team sports, such as basketball and football. There are also individual（个人的）sports, such as swimming and running. Skating and mountain climbing are the most popular recreation（消遣）for people who like to be outdoors.

Not everyone who enjoys sports likes to take part in them. Many people like watching them on TV or listening to them on the radio. So many people like some indoor relaxation, such as watching TV, singing and dancing.

It doesn’t matter if we like indoor recreation or take part in outdoor sports. It is important for everyone to relax from time to time, and enjoy themselves.

【推荐3】阅读短文，掌握其大意，然后根据短文内容从下面选择恰当的选项还原到文中，使短文意思通顺，结构完整。每个选项至多使用一次，有一项多余。请将答案编号涂卡。

As spring is coming, we can easily find a large number of people who are doing sports.     1     Everything is hard at first. More importantly, how can you develop an everyday habit and stick to it?

Set a goal

Before getting started, ask yourself “Why do I want to exercise?”     2     Sports can also bring people both physical and mental health. Also, it can train spirit and develop personality. If you have a goal in mind, it will be much easier to say no to junk food and yes to daily exercise.

Choose a proper sport

Some play basketball well while others show great interest in tennis. When choosing a sport, you are advised to pick a simple but useful one because it doesn’t require a long period of time to practice your skills. In that case, you will not give up easily.     3     Most people can get used to it without too much training. What’s more, it helps to free us from the daily stress and negative emotions (消极情绪).

Find a partner

    4     However busy you are, it’s impossible to refuse your friend’s invitation since the promise you made to each other shouldn’t be broken easily. Besides, exercising together with a friend can reduce the tiredness and increase the chance to achieve your goal as well.

Look for small ways to exercise

Setting aside a whole morning for exercise is a good idea.     5     For example, do not take the lift when going home and take the stairs (楼梯) instead. Or get up from your desk during your break between classes to do stretches (拉伸). These simple physical activities will certainly pay off.

All in all, sports play an important role in our life. So take up exercise right now and make it part of your life in this season of new beginnings.

【推荐1】A new study finds that more than eighty percent of Internet users in the United States search of health information online.

Susannah Fox from the Pew Internet Project says doctors are still the main source of health information. But the study found that searching online is one of the leading ways that people look for a second opinion. He says, “People are sort of fact-checking what they have heard from a doctor. Our studies show that people are still very likely to turn to a health doctor when they need a diagnosis (诊断) or are planning a treatment.”

Forty-four percent of people are actually looking for doctors or other providers when they search for health information online.   Two-thirds of Internet users look online for information about a certain disease or medical condition.

The Internet has also become an important source of spiritual support for people with health problems. Susannah Fox says one in five Internet users has gone online to find other people who have the same condition.   

A disease is considered uncommon if it affects(侵袭) fewer than 200,000 people worldwide. The rise of social networking has made it easier for people with uncommon diseases to connect with each other and feel less alone. Social networking is also changing the way some doctors and patients communicate with each other.

Dr. Jeff   Livingston operates a medical center for women in Irving, Texas. His office uses password-protected software to share information with patients. He says the software has increased efficiency(效率)， reduced costs and improved relations with patients. It has just changed the way we do health care. His medical centre also has a Facebook page, a Myspace page and a Twitter feed.

【推荐2】Acupuncture (针灸) is an important part of Traditional Chinese Medicine. Growing up, I’d always considered it out of date. As we know, acupuncture treatment lasts a long period and causes a lot of pain. But my experience made me change my mind.

Last month, I slept through a flight from London to Beijing. When I woke up, I found that I could no longer move my right arm and fingers. There was no pain. My arm simply didn't follow my brain’s instructions to move, as if it was no longer mine.

One doctor said he could do nothing but give me some pills. “Rest for two months first and come back for an examination.” I felt great fear.

In that moment of despair, my friend, an acupuncturist in Sichuan, offered to help. I started my treatment the next day. At first, I was worried. After a few days, I could move my fingers. Two weeks later, I could use chopsticks. Within a month, I got almost well. It was amazing.

Acupuncture first appeared in China more than 2, 000 years ago. It works by improving the smooth flow (流动) of “qi”. “Qi” flows through “jingluo” throughout the body.

I hope this kind of traditional Chinese treatment will bring health and happiness to friends all over the world.

【推荐1】Boys and girls, let’s do an experiment (实验) in today’s lesson.

What we need:

How we do the experiment:

1．Pour tag water into the glass until it is about 2/3 full.

2．Drop the egg carefully into the glass and watch it going down towards the bottom.

3．Add about five spoons of salt to the water. Test to see if the egg goes up.

4．Add more salt if the egg is still at the bottom.

The science behind it:

Things go down in the water when they are denser (密度更大的) than the water. By adding salt, we make the water denser. Once the water is denser than the egg, it goes up and floats (漂浮) on the water.

You can also try other things to see if you can have the same result.

A．

B．

C．

【推荐2】Nobody laughed when the UK comedy show Little Britain toured the US. Americans didn’t find the “British stereotypes( 刻板印象)” funny. One character was a woman who was sick whenever she saw a foreigner. Another was a loud and rude l5-year-old girl cursing(骂) at her teachers. But back home, British people were laughing, thinking, “Yes! That’s exactly what we’re like!”

A laugh is a laugh in any language, but the reasons for it can be very different. Britons and Americans speak the same language, but humor does not always translate.

Take The Office as an example. This was originally a UK TV series but it was changed for the US. Both the US and UK series are set in a boring workplace in a boring town. But David Brent, the boss of the UK office, is not a nice guy like Michael Scott in the US version. “We had to make Michael Scott a slightly nicer guy,” wrote series creator Ricky Gervais. “He couldn’t be too mean.”

Gervais said British people are different from Americans because “Britons cruelly make fun of people we like or dislike... and of ourselves”. He believes the differences between the Americans and British sense of humor are because of “our upbringing.”

“Americans are brought up to believe they can be the next president of the United States,” he wrote. “Britons are told, ‘It won’t happen for you’.”

Things usually turn out fine at the end of every US Office episode. Even if they’re not perfect, the characters “learn a lesson” for the future.

But in David Brent’s office and in lots of UK comedies the last scene is often sad. You are often left with the feeling that things just couldn’t get worse. For British people, this seems truer to life and so much funnier.

It’s not just Britain and the US that have comic differences. Few foreigners would understand a Chinese cross-talk show, for example.

Cultural differences are no laughing matter. But comic differences can be a window into a culture.

【推荐3】Migratory (迁徙的) birds fly to different places during different seasons. This is bird migration. Birds in migration may fly day and night for months at a time. During this long journey, when and how do they sleep?

Some scientists once studied a group of frigate birds (军舰鸟) during a ten-day flight. They recorded these birds’ brain activities. Their findings made headlines-frigate birds can sleep while they are flying!

According to this study, these birds take two types of in-flight naps. The first is called Rapid Eye Movement(REM快速动眼) sleep. It is the deepest stage of sleep. For humans, REM sleep can last for several minutes. For flying birds, however, REM sleep lasts for only a few seconds. Even so, REM sleep is still very important for proper brain functioning.

The other type of nap frigate birds take is Non-Rapid Eye Movement (NREM) sleep. During NREM sleep, the birds put only half of their brain to sleep, while the other half stays awake. The eyes of these birds are connected to the waking part of their brain. In other words, they sleep with their eyes open. They do this to stay away from dangers, and many birds do this even when they aren’t migrating.

Even though frigate birds sleep during the flight, they prefer to stay awake most of the time, spending less than 3% of their time sleeping. Once they reach land, they recover their lost sleep, spending almost half their time dozing.

However, not all migratory birds sleep in this way. Many make occasional pit stops on their way to get a good rest before the next leg of their journey. Some stay completely awake during the whole journey. The Alpine Swift (高山雨燕), for example, can fly for almost 200 days continuously. There is still little evidence of these birds sleeping during their long journeys.

The sleeping habits of birds differ from species (物种) to species. This makes the study of migratory birds very exciting for scientists. In the future, we may learn more amazing things about these animals.