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题型:阅读理解-单选 难度:0.65 引用次数:145 题号:22039697

It’s known that green tea is a symbol of Chinese culture. Also, it helps to improve health in so many ways that some people think of it as a kind of medicine. Perhaps that is why the Chinese have been using it for more than 4, 000 years to treat all kinds of medical problems. Today, scientists know that there are catechin, caffeine, vitamin C and theanine in green tea that are good for health.

Catechin is helpful for lowering (降低) cancer (癌症) risk. It protects the body from cancer-causing substances (物质) and slows the growth of cancer. Besides fighting cancer, catechin prevents serious health problems like heart disease.

Caffeine causes the heart to beat faster. That’s why it was once thought that caffeine was not very healthy, but studies suggest that there are also good reasons for drinking caffeine. Specifically, caffeine has to do with a lower risk for Parkinson’s disease and liver (肝脏) disease. Yet, caffeine also has some weaknesses. It can influence sleep and make people nervous, so experts advise teenagers not to have more than 100 ml of caffeine a day. This is about the caffeine of a small cup of coffee.

Vitamin C is something that the human body cannot make enough by itself. So we have to get it through food and drink. The vitamin may play a role in improving physical conditions to colds and the flu. Also, it helps people to get well more quickly from those illnesses.

Theanine is another healthy substance found in tea. It has been shown to lower stress, both mental and physical, and increase mind abilities. It is also used for preventing some brain diseases.

As you can see, green tea has many good values. Drinking it may help you stay healthy. Of course, as with any healthy substance, it is important to check if there are any bad influence as well.

1. Why have the Chinese been using tea for over 4, 000 years according to the passage?
A.Because it’s delicious for us to drink.
B.Because it helps to deal with illnesses.
C.Because it’s a symbol of Chinese culture.
D.Because it’s made into different drinks.
2. Why is caffeine in green tea good for our health?
A.It lowers cancer risk.
B.It makes the heart to beat faster.
C.It lowers liver disease risk.
D.It makes people less stressed.
3. What does the writer mainly want to tell us?
A.Tea can take the place of medicine.
B.We should drink as much tea as possible.
C.Tea has some bad influence on our health.
D.Drinking tea may help people to stay in health.
4. Which of the following best shows the structure of the text?
A.B.C.D.
【知识点】 科普知识 说明文

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[A]

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[B]

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【推荐2】Everyone has got two personalities(性格)---the one that is shown to the world and the other that is secret and real. You don’t show your secret personality when you’re awake because you can control yourself, but when you’re asleep, your sleeping position shows the real you. On a normal night, of course, you often change your sleeping positions. The important position that best shows your secret personality is the one that you are asleep and completely don’t know what’s happening around you.

If you go to sleep on your back, you’re a very open person. You normally trust people and you are easily influenced by new ideas. You don’t like to make people unhappy, so you never express your real feelings. You’re quite shy and you aren’t very confident.

If you sleep on your stomach, you are a person who likes to keep secrets. You worry a lot and you’re always easily becoming sad. You never want to change your ideas, but you are satisfied with your life they way it is. You usually live for today not for tomorrow.

If you sleep on curled up(蜷缩), you are probably a very nervous person. You have a low opinion of yourself and often protect yourself from being hurt, so you are very defensive. You’re shy and you don’t usually like meeting people. You like to be on your own.

If you sleep on your side, you have usually got a well-balanced(平衡的)personality. You know your strengths and weaknesses. You’re usually careful. You have a confident personality. You sometimes feel worried, but you don’t often get unhappy. You always say what you think, even if it makes people angry.

1. You may find the passage in                   .
A.a science magazineB.a guide book
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A.Sleeping on your side is the best way of sleeping.
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2017 NOBEL PRIZE IN PHYSIOLOGY OR MEDICINE
Clock in your body
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B.only humans have biological clocks inside their body.
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