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题型:阅读理解-单选 难度:0.65 引用次数:50 题号:13147290

Is there the best time to sleep? Actually, you have an amazing biological clock (生物钟) inside your body which can tell you some true facts.

From 11 p.m. to 3 a.m, your liver (肝脏) gets larger when filled with more blood and it lets the rubbish in your body out. If you go to sleep at 11 p.m., you have 4 hours to clean up the rubbish. And if you sleep at 2 a.m, there is only an hour to go. What if you sleep after 3 a.m.? Unfortunately, you won’t have any time to clean yourself. If you continue with this sleeping habit, there will be more toxins (毒素) in your body. You know what will happen next.

What if you go to bed late and wake up late? Did you realize you felt very tired the next day no matter how much you slept?

Going to bed late is very bad for your health. Besides not having enough time to clean your body, you will miss other important body functions (功能), too.

From 3 a.m. to 5 a.m., you should exercise and breathe in fresh air to take in good energy into your body. From 5 a.m. to 7 a.m., go to the toilet. And from 7 a.m. to 9 a.m., it’s the best time to have breakfast. This is your most important meal in a day. Not having breakfast causes lots of health problems for you in the future.

Once you know the importance of your biological clock, try your best to follow it. What if you have much work to do until late at night? Well, why not go to bed early and wake up early to do it? You’ll get the same time, but your body will get fit.

1. After reading, We can learn ________ is the proper time to go to bed.
A.3 p.m.B.2 a.m.C.11 p.m.D.5 a.m.
2. If you always go to bed late, ________.
A.you’ll lose weightB.you’ll do more work
C.your liver will get lagerD.there will be more toxins in your body
3. The underlined word “breathe” means ________ in Chinese.
A.释放B.呼吸C.循环D.消化
4. Which of the following is WRONG according to the text?
A.The liver helps clean up the rubbish in the body.
B.It’s best to have breakfast between 7 a.m. and 9 a.m.
C.You’d better enjoy a good sleep from 11 p.m. to 3 a.m.
D.It’s necessary to stay up late when there is much work to do.
5. The passage mainly talks about ________.
A.going to bed as early as possible
B.doing exercise is quite necessary
C.following your biological clock and you will get fit
D.we should do different things in different times of a day

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【推荐1】Streetball is a city game. People play it on playgrounds and in gyms around the world.

Usually only one side of the court is used in the streetbal, but the rules of the game are almost the same as basketball games. The number of players in a game may be only 2, and it is called one-to-one. Sometimes there are also two teams of five players each. It is easy for you to join a streetball game. You only need to go to an outdoor court. If there are some teams playing, and they agree to let you take part in, then you have a chance to join any team.

Streetball is a very popular game in the world, and it is very popular with the young people. Some cities in the United States even have streetball programs on TV. It is said (据说) that this is a good way for young people to keep away from troubles such as crimes (犯罪) and drugs (毒品).

1. Where do people usually play streetball?
A.On the hill.B.In the classroom.C.On playground.D.In the water.
2. The rules of streetball games are almost the same as ___________ games.
A.baseballB.footballC.volleyballD.basketball
3. What does the underlined word “troubles” mean in Chinese?
A.麻烦B.荣誉C.诱惑D.纠缠
4. Why do people say the streetball game is good for the young people?
A.Because it is very popular.
B.Because it can be played by two people.
C.Because it can make them strong.
D.Because it can keep them from some troubles.
5. What can we know from the passage?
A.It’s not easy to join a streetball game.
B.The streetball game is only for good players.
C.The streetball is very popular with young people.
D.There are many programs on TV about the streetball game all over the world.
2020-11-27更新 | 130次组卷
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    1     . As we know, we put food on a plate and water in a glass on earth. Gravity(引力) holds the food down and keeps the water in the glass. But in space, there is almost no gravity. So food can float away, and astronauts must eat and drink carefully.

    2    . In space, sleeping is very different. Some astronauts like to float in the air, but some astronauts like to be in a sleeping bag. They tie the bag to a wall so that they can’t float at night.

    3    . Exercise is very important in space. On earth, your legs carry your body, but in space, astronauts float, so they do not use their legs. This is bad for their legs, so they exercise for thirty minutes every day. They often use an exercise bike for this.

    4    . Many people can use computers, but few of them know how to look after them. Remember the following when you use computers: Keep your computer in a cool, dry room; do not put water or food near your computer; keep your screen clean and not too bright.

    5    . Some things can carry messages. For example, a sign at the bus stop helps you to know which bus to take. Signs on the door tell you where to go in or out. Have you ever noticed that there are a lot of signs around you and that you receive messages from them all the time?

A.Use computer in right ways
B.How to sleep in right ways
C.How to keep healthy in right ways
D.Signs and messages
E.Eating and drinking in space
F.The importance of exercise
2020-11-11更新 | 120次组卷
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【推荐3】Many people dream of travelling into outer space. However, spending too much time in space may cause health problems, according to NASA. That’s why astronauts shouldn’t spend more than six months on the International Space Station (ISS) at a time.

Muscle (肌肉) and bone (骨头) less

In a weightless environment, astronauts don’t need to use their muscles to support themselves. Therefore, their muscles start shrinking (萎缩). To keep their muscles strong, astronauts need to exercise about 2 hours each day on the ISS. The weightless environment also causes astronauts’ bones to lose minerals (矿物质), with density (密度) dropping at over 1 percent per month.

Sleep disorder (混乱)

In space, the sun rises every 90 minutes. It is hard for astronauts to get used to this light-dark cycle when they sleep. Also, they need to sleep in a sleeping bag that is fixed to a wall, which is uncomfortable. Astronauts now have individual sleeping pods (分离仓) that help shut out some of the light. Still, studies have found that most astronauts only sleep about six hours each night, even though they should have eight and a half hours. Brain changes scientists have found that the position of the brain changes during spaceflight. It shifts upward within the skull (头骨). This can affect how the brain deals with how we see, stay balanced (平衡) and move around. That’s why some astronauts can’t control (控制) their movement and balance after returning to the Earth.

Scientists have also found that astronauts may get used to this change after going on more spaceflights. But they still need to do more research.

1. According to the story, astronauts may suffer the following health problems.
a. bone loss       b. high blood pressure            c. sleep disorder       d. mental disease       e. muscle shrinking
A.abeB.bceC.aceD.bed
2. Astronauts suffer muscle problems after returning to the Earth because ________.
A.they are too busy to exercise in space.B.they don’t have enough room to exercise in space.
C.they don’t use their muscles in space.D.they rarely (很少) walk while in space.
3. How can astronauts deal with the problem of losing their balance?
A.They can walk upside-down on the Earth.B.They can go on more spaceflights.
C.They can take some medicine.D.They can sleep more and rest.
2021-09-15更新 | 9次组卷
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