Height is just one of the features your genes (基因) decide. In fact, because you have two parents, your genes provide you a height that usually lands somewhere between the height of each parent. If both your parents are tall, then most probably you will be tall, too. But if you have questions about how tall you’re going to be, ask your doctor if he or she can help you find them out.
But genes don’t decide everything. For example, eating an unhealthy diet can keep you from growing to your full potential (潜力). Getting plenty of sleep and enough exercise will help you grow to the expected height.
It’s natural that you’re wondering how fast you should grow. There’s no perfect or right answer. Generally speaking, kids grow about 6 cm a year between age 3 and the time when they start puberty .
Your doctor will know how your growth has been going over the years. 2 cm here and 3 cm there make a little difference to the height you’re at now. How have you been growing up to this height？What other changes may your body be going through？
Don’t be amazed if you seem to have grown a lot in a very short time. Everyone has a growth spurt (高峰) during puberty. The age for starting puberty is about 10 for girls and about 11 for boys. But it can be earlier or later — between 7 and 13 for girls and 9 and 15 for boys.
You’ll usually begin to notice that you’re growing faster about a year after your body starts to show the first changes of puberty.If you want to know how tall you should grow, _______.
| A．you should have enough exercise |
| B．you can ask doctors for help |
| C．you should take some special medicine |
| D．you can record your growth during puberty |
The Chinese for the word “ puberty ” is _______.
| A．童年时期 | B．婴幼儿时期 |
| C．习惯养成期 | D．生长发育期 |
This passage is mainly about ______.
| A．how the genes work in your body |
| B．how your parents’ height influence you |
| C．how you look like your parents |
| D．how you grow to a certain height |
After reading this passage, we can explain ______.
| A．how good it is to be a doctor |
| B．how much sleep time we need |
| C．why genes can’t decide everything |
| D．what healthy diet is |
Which is NOT mentioned in the passage？
| A．Your height most probably depends on how tall your parents are. |
| B．Girls’ age for starting puberty is usually earlier than that for boys’. |
| C．The features showing the first changes of puberty between boys and girls are different. |
| D．You may be amazed sometimes when you grow too fast. |
【2014年四川省乐山市中考】
Usually, students are not encouraged to run or jump around in the corridor (走廊). However,students in a British grammar school really enjoy running on the corridor tiles (瓷砖) and their teachers even encourage them to do that.
Why? It is because the corridor was built with special kinetic (动能的) tiles. When students jump on the tiles, electricity will be generated ( 产生). After one year, the electricity generated from the tiles can fully charge 853 mobile phones or power(供电) an electric car to drive seven miles. It’s amazing, isn’t it?
The corridor tiles are really a brilliant invention. Students can not only play on the corridor,but also help power the lights in their school corridors and other devices ( 设备) in their classrooms. Besides, this is a good way to teach students to be creative. They will be inspired to be scientists, inventors and engineers in the future to find clean energy for all humans.
The inventor of the magic corridor tiles is Laurence Kemball-Cook. He was once a student in this school. Now, he is CEO of his own company. The corridor tiles are not Laurence’s only invention. He has also invented a special dance floor, which can be used at music festivals. It allows dancers to charge their mobile phones while they are dancing on the dance floor.Why do the students in the passage enjoy running on the corridor tiles?
A. Because the corridor tiles are expensive.
B. Because the teachers ask them to do that.
C. Because the corridor was built with special tiles.After one year, the electricity generated from the tiles can provide enough energy for _______.
A. over 800 mobile phones
B. all the lights of the school
C. an electric car to drive70 milesThe underlined word “inspired” most probably means “ _________”.
A. encouraged B. forced C. trainedWhat else has Laurence invented besides the corridor tiles from the passage?
A. A mobile phone.
B. A music player.
C. A special dance floor.According to the passage, which of the following statements is TRUE?
A. Students are not allowed to walk in the corridor.
B. Laurence once studied in the British grammar school.
C. Laurence has more than one company of his own.
【2014年山东省临沂市中考】
What will the car be like in the future? Maybe we can sit in a car that can drive itself.
About 40 years ago, scientists from the United States started to develop self-driving cars (无人驾驶汽车). The most famous recent one was made by Google in 2009. There are cameras and radars (雷达) on the top of the car. They allow the computer in the car to draw a 3D map of the environment. Chinese scientists have also successfully developed a self-driving car. The car made a trip from Changsha to Wuhan.
Is a self-driving car safe? A recent study shows that robots make safer drivers than humans. If only 10% of cars on the street are self-driving, they will save 1,000 lives (生命) every year. If 90% of vehicles (交通工具) are self-driving, 21,700 lives will be saved a year. However, a self-driving car is expensive and each costs about $100,000. So it is impossible to be very popular in the near future.
根据短文内容，判断下列句子正误。正确的用“A”表示，不正确的用“B”表示。American scientists started to develop self-driving cars in 2009.
Cameras and computers are on the top of the self-driving car by Google.
In China, scientists have successfully developed a self-driving car.
The more self-driving cars there are on the street, the fewer traffic deaths there will be.
The self-driving cars will be very popular in the near future.
【2014年内蒙古呼和浩特市中考】
The police find most criminals (罪犯) because somebody tells them who the criminals are. They find other criminals by using science and their computers. When there is a bank robbery (抢劫), the police first look through their computers for the names of the bank robbers that they know about. Then they go and talk to any of these robbers who are not in prison (监狱). They ask them where they were when the robbery happened. If any of these people cannot give a good answer, the police will often use science to find out if one of them is the robber.
Many criminals leave something of themselves at the places of the crimes like a fingerprint or a hair. Or they take something away on their shoes or clothes, like dirt or animal hair. If they leave behind some of their blood or their hair or a piece of skin, it will have their DNA inside it.
Everyone’s DNA is different and their fingerprints are also different. So, if a criminal cuts himself during a robbery or leaves his hair, or even a small piece of skin, scientists can find out what his DNA is. The police can then ask the person they think is the robber to give them his hair or some blood and see if it has the same DNA. Many criminals are in prison today because of this kind of evidences .
根据上文内容判断正 ( T ) 误( F )Usually the police find criminals because they use their computer.
The police do not usually ask criminals who are in prison about a crime because these criminals could not have done it.
The most useful evidences that criminals leave at the places of their crimes are things with their DNA in them.
Many criminals usually take something away only on their shoes after the crimes.
The story is about a bank robbery.
【2014年四川省内江市中考】
阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳答案，并在答题卡上将该项涂黑。
While we are still children ,most of us live at home with our parents, more or less peacefully . But as we become teenagers , things change ,and we begin to grow apart from our parents . This means we are almost ready to leave the house where we grew up and make a new home of our own .
All humans must do this ,but they don’t all do it in the same way . If ,for instance ,you belong to a primitive tribe (原始部落) ，then as you grew up ,you’d learn the skills you needed as an adult---how to catch fish ,how to keep the house and look after children . You would be ready to marry in your early teens and you would build a house and live near your family in the village.
This seems a very old way of life , but it is what humans have been used to through hundreds of years. And it is what we are still used to in the 21st century ,for man hasn’t changed in the short time since he became civilized(文明的). But could you leave home and look after yourself during the teen years ? Most people would not do very well . Why ? Because although man hasn’t changed very much , the society he lives in has changed greatly ,which means that we have to learn more and more before we are ready to leave our parents’ shelter( 居所 ) and live alone .
However ,sometimes it is very frustrating to live at parents’ home . Parents can be very upset about late nights ,criticizing friends and always saying that we are noisy and dirty . But we still need our emotional (情感的) shelter till we finish our studies , and that is why we usually stay in our parents’ home until we feel grown up enough to deal with living alone .When does the relationship with parents start changing ?
| A．When we are children. | B．When we become teenagers. |
| C．When we are alone. | D．When we get married. |
For most teenagers of the 21st century ,making a new home of their own may be ________.
| A．difficult | B．unimportant |
| C．impossible | D．quite easy |
Why must we know more to be able to live alone ?
| A．Because we are becoming less talented. |
| B．Because our society has changed a lot. |
| C．Because not enough is taught in our schools. |
| D．Because man has never really been civilized. |
From the passage ,we know living at parents’ home when we become teenagers _______.
| A．is always pleasant |
| B．must be very exciting |
| C．makes us feel lonely |
| D．may be annoying |
【2014年湖南省娄底市中考】
阅读理解 阅读下面A、B两篇材料并根据材料内容做后面的题目，从各题所给的A、B、C3个选项中选出能回答所提问题或完成所给句子的最佳答案。（共10小题，计20分）
（A）
Today sending text messages(短信) through mobile phone(手机) is a part of our lives. According to a survey(调查), a third of the U.S. children send more than 100 text messages a day. Sending text messages is becoming more and more popular among young people in China, too. Children prefer text messages to communicate(交流) with friends no matter(不论) where they are, even under the noses of parents and teachers. It seems that some children are “addicted(上瘾)” to sending text messages. In fact, sending too many text messages is bad for their lives, health and study. However, it isn’t all bad. It helps to improve our lives in some ways. Today many children greet(问候) each other on holidays by sending text messages instead of writing paper cards. During the last Spring Festival, more than 15 billion(十亿) text messages were sent in China. “Sending text messages helps save my pocket money,” said Wang Cheng, a friend of mine, “and it saves paper, too.” Many parents send their kids text messages instead of giving orders by mouth. It sounds more friendly. And children can accept them easily.
Sending ______ is a part of our lives today.
A. magazines B. text messages C. cards
______ young people like sending text messages, too.
A. Chinese B. English C. Indian
Why is sending too many text messages bad for study?
A. Because it costs much time.
B. Because it costs much money.
C. Because it makes the parents angry.
Today many children greet each other on holidays by______.
A. visiting
B. writing paper cards
C. sending text messages
Sending text messages can ______.
A. make us study well
B. save money and paper
C. make children clever
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