Have you ever rubbed your hands together when they get cold? Why do we do that? We do that for friction. Friction happens when two things that aren’t very smooth rub together to make heat energy. The faster you rub two things together, the more friction (and heat) you can make. Let’s discover friction!
| WHAT YOU’LL NEED: ● Soap ● Water ● Your hands! WHAT TO DO: 1. Make sure your hands are dry. 2. Rub your hands together until you feel the heat of your hands. 3. Now, use soap and water to get your hands very slippery (滑的). 4. Try to make friction happen while your hands are slippery. 5. Please write down what has happened. LET’S TALK! Friction is an energy that happens when two things rub together. When friction happens, it makes heat! When your hands are slippery, they won’t make very much friction and your hands won’t get so hot. DID YOU KNOW? 1. Friction happens when you stop your fast running bike. 2. Ancient people made fires by rubbing two pieces of wood together. Friction happened though they didn’t know it. ? Friction is everywhere. Have you ever noticed situations where friction is happening? If not, ask your parents to take you out in a car. If it is not too hot, touch the tires (轮胎) of the car before and after a short drive to see how much warmer they get from friction. |
根据表格内容，选择正确答案。 You’d better make your hands to get heat when you rub them.
| A．slippery | B．dry | C．wet | D．smooth |
What does the word “friction” in this text mean in Chinese?
| A．摩擦 | B．冷却 | C．膨胀 | D．震动 |
is NOT an example of friction.
| A．Bike riding | B．Car driving | C．Hands rubbing | D．Friction discovering |
What’s the last column (栏目)?
| A．THINK IT OVER! | B．WHAT HAPPENED? |
| C．EVERYDAY ACTION: | D．WORK WITH PARENTS! |
This text is most probably .
| A．a science report | B．a car advertisement |
| C．a rubbing introduction | D．a chemistry programme |
There have been many great inventions, things that changed the way we live. The first great invention was one that is still very important today -the wheel. This made it easier to carry heavy things and to travel a long distance.
For hundreds of years after that there were few inventions that had as much effect (作用) as the wheel. Then in the early 1800's the word started to change. There was little unknown land left in the world. People didn't have to explore（探索） much anymore. They began to work hard to make life better. In the second half of the 19th century many great inventions were made. Among them were the camera, the electric light and the radio. These all became a big part of our life today. The first part of the 20th century saw more great inventions. The helicopter (直升飞机) in 1909. Sound movies in 1926. The computer in 1928. And jet planes in 1930. This was also a time when a new material was first made. Nylon came out in 1935. It changed the kind of clothes people wear.
By this time most people had a very good life. Of course new inventions continued to be made. But man now had a desire to explore again. The world is known to man but the stars are not yet. Man began looking for ways to go into space. Russia made the first step. Then the United States took a step. Since then other countries, including China and Japan, have made their steps into space.
In 1969 man took his biggest step away from the earth. Americans first walked on the moon. This is certainly just a beginning thought. New inventions will some day allow us to do things we have never yet dreamed of.This passage talks mainly about ___________.
| A．why cars were very important |
| B．when light was invented |
| C．which country made the first step into space |
| D．how inventions effect people’s life |
Nylon came out nearly at the same time as__________.
| A．radio | B．camera | C．jet plane | D．movies |
Which of the statement is not true?
| A．For hundreds of years after wheel there were many other inventions having as much effect as the wheel. |
| B．America, Russia, Japan and China began to explore the stars before 1969. |
| C．In the early 1800’s people began to work instead of exploring more unknown land to make life better. |
| D．New invention will change our life greatly in the future. |
What does “a desire” mean in the passage?
| A．a good way | B．a new invention |
| C．a strong wish | D．a wonderful idea |
Man didn’t have a desire to explore a lot ______________.
| A．at the beginning of the 1800’s |
| B．in the 1960’s |
| C．since the 1900’s |
| D．from the 1800’s to the 1960’s |
A well-known poem by Tang dynasty poet Du Mu tells of a scene in early April: “Rains fall heavily as Qingming comes, and passersby with lowered spirits go.”
This scene takes place on Tomb Sweeping Day, also known as Qingming Festival. Tomb Sweeping Day is a traditional Chinese festival. Tomb Sweeping Day is a traditional Chinese festival. It began in the Zhou dynasty, over 2, 500 years ago. Chinese people celebrate it to remember and honor their ancestors(祖先). This year, it falls on April 4. Tomb Sweeping Day became a public holiday in the Chinese mainland in 2008. People have one day off for that day.
On this day. families bring flowers, food and wine to the grave sites(墓地) of their ancestors. They place cakes, fruits in front of the grave and some may bum joss paper as money for the dead. After that, they sweep the tombs and cherish(怀念) the memories of their dead family members.
Tomb Sweeping Day gives us a chance to show respect to our ancestors and family members who have passed away and show that we miss them. This tradition shows that family values are an important part of Chinese culture.
Tomb Sweeping Day is also the beginning of the time for gardening and outdoor activities in China. Families often get together for outings or to fly kites at this time.The Chinese meaning of the underlined word “passersby” is ______.
| A．行人 | B．陌生人 | C．故人 | D．古代人 |
Tomb Sweeping Day is celebrated for people to ______.
A. go out to fly kites
B. B. have a public holiday
C. get together with their families
D. remember and honor their ancestorsWhat can people take to the grave sites according to the passage?
| A．Flowers, food, fruits and umbrellas. |
| B． Flowers, food, wine and joss paper. |
| C．Food, fruits. joss paper and kites. |
| D．Flowers, wine and pets. |
Which of the following is NOT mentioned in the passage?
| A．We have one day off for Tomb Sweeping Day. |
| B．Tomb Sweeping Day began in the Zhou dynasty. |
| C．People in the world celebrate Tomb Sweeping Day. |
| D．Family values play an important role in Chinese culture. |
What does the passage mainly discuss?
| A．People bring many things to the grave site. |
| B．Du Mu wrote a poem about Qingming Festival. |
| C．Tome Sweeping Day is a traditional Chinese festival. |
| D．Qingming Festival is a good time for outdoor activities. |
任务型阅读
The population is one of the greatest problems in the world. The population in developing countries is more serious than that in developed countries.Women in developed countries often have only one or two children. While in some developing countries ,many women have three or four children.
China has the largest population in the world.The newborn population each year is almost as large as the whole population of Australia. If the population grows so fast, there won’t be enough space for people to stand on the earth.What’s more,a large population also causes many difficulties for the whole world. So some things must be done to stop the population from growing so fast. China has carried out a policy called family planning .
That’s late marriage.late child. fewer births and better babies.I think family planning is a useful policy to control China’s population,and things will be better if it workes well in controlling the population of China.What do you think of it?
What can you tell from the population in developing countries and in developed countries?
__________________________________________________________________________
Which country has the largest population?
_________________________________________________________________________________
What problems does the large population cause?
_________________________________________________________________________________
Has China carried out a policy called family planning ?
_________________________________________________________________________________
把划线部分翻译成汉语。 ________________________________________________________________________________
No Car Day was first started by 34 cities in France on September 22, 1998. It was started to protect the environment. By now, more than 1,000 cities around the world have had a No Car Day.
The first No Car Day in China was in Chengdu in 2001. Other cities, including Beijing, Taibei, Shanghai,Wuhan and Shenzhen also support the day.
In Beijing, more and more people are joining in the activity. It asks drivers to leave their cars for one day each week and walk, take a bus or subway or ride a bike to work. The slogan（口号）for the activity is,“If we drive for one less day, we can have one more nice day.” Beijing is trying to have 238 blue sky days this year. In the first three months of this year Beijing only have 52 blue sky days. This was 11 days less than the number for the same period last year. Car exhaust(汽车尾气) is one of the most important reasons of the pollution. We must do more for No Car Day.
So far, more than 200,000 drivers have shown their support. “We can’t control the weather, but we can choose not to drive.” said Wu Zonghua, a car club chairman.
There are_______ cities in China that support No Car Day according to the passage.
| A．four | B．five | C．six | D．seven |
The activity of No Car Day encourages drivers in Beijing to work.
| A．to take a bus, or subway. | B．ride a bike |
| C．to walk | D．A,B and C |
According to the passage there were blue sky days in the first three months of last year in Beijing.
| A．238 | B．63 | C．52 | D．41 |
The air pollution in Beijing is mainly caused by according to the passage.
| A．noise | B．cars | C．rubbish | D．weather |
The main idea of the passage is .
| A．So far, more than 200,000 drivers have shown their support |
| B．more and more people in Beijing are joining a No Car Day activity. |
| C．more than 1,000 cities around the world have had a No Car Day. |
| D．a No Car Day helps to protect our environment. |
As we all know, people couldn’t live without water. Some parts of our bodies are made of water. We depend on clean water to live every day.
However, we human beings are polluting water seriously. In some areas of China, people are still in great need of clean water. Dirty water is one of the world’s biggest health problems. It’s harmful to our health. When water from the rain and melting(融化) snow runs through roads, it picks up some dangerous chemicals and other things along the way. Many of the rivers are short of protections, so they are easy to be polluted by factories or animals’ waste.
World Water Day has grown to become one of the important dates since 1993. In 2013, World Water Day shares the topic of Water Cooperation(合作). If everyone tries their best to save and protect the clean water, our living conditions will be much better.
we know that people couldn’t live without _________ according to the first paragraph.
| A．fire | B．water | C．books | D．language |
Many of the rivers are easy to be polluted by __________.
| A．animals | B．human beings’ waste |
| C．fish | D．factories or animals’ waste |
he underlined phrases “pikes up ”in paragraph 2 means“______”.
| A．毁坏 | B．接送 | C．带走 | D．拾起 |
When has World Water Day become one of the most important dates?
| A．since 1993. | B．in 1993 | C．in 2013. | D．since 2013 |
Which of the following is NOT right?
| A．Dirty water does harm to humans’health. |
| B．Human beings aren’t short of clean water. |
| C．The topic of 2013 World Water Day is Water Cooperation. |
| D．We should try our best to protect the clean water. |
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