阅读理解 The Internet joins millions of computers all over the world,and today it is used by people all over th...

题型：阅读选择题类：常考题难易度：普通

新目标（Go for it）版2018-2019学年初中英语九年级全册Unit 6 When was it invented? 单元练习

阅读理解

The Internet joins millions of computers all over the world,and today it is used by people all over the world.It was invented in the 1960s in the USA.The American government needed a network of computers for its army.Then in the 1970s scientists and business people also wanted to use the Internet to send and receive messages.For some years,they weren't allowed to use the US network,and when they were allowed to,the messages were in very simple text without photos.

The World Wide Web was invented by a British scientist named Tim Berners-Lee in 1989.He wanted to send documents to other scientists,so he developed the World Wide Web.This allowed him to send and receive scientific documents with text,drawings and photos(also called multimedia documents).In the 1990s,more and more people began to use the Internet and the World Wide Web.

So what's the difference between the Internet and the World Wide Web?The Internet is the hardware.It allows us to communicate with other people.The World Wide Web is the software.It allows us to create, see and read multimedia documents.

The Web is made up of millions of documents called Web pages.These pages are held in computers all over the world.Many people have a favorite website with a number of Web pages on the same subject.

The email is a way of using your computer to send and receive messages.It's cheaper and quicker to use emails than send normal mails.New users call the normal mail “snail mail” because it's too slow.It took 50 years for 100 million people to listen to the radio.It took 15 years for 100 million people to watch television.By the year 2000, it had taken only about three years for 100 million people to use the Internet.What will happen next on the Internet?

（1）、The Internet was first invented for .

A、scientific work B、the American army C、business people D、the American government

（2）、The World Wide Web was invented to .

A、communicate with others B、create,see and read documents C、send and receive scientific documents D、send and receive simple text without photos

（3）、The Internet and the World Wide Web began to be widely used .

A、in the 1970s B、in the 1990s C、in the late of 1980s D、by the year 2000

（4）、The writer wrote the last paragraph to show that .

A、the Internet has a greater influence than radio and TV B、radio and TV will be replaced by computers C、the use of the Internet spreads very quickly D、people spend much more time on the Internet

（5）、The best title of the passage may be “ ”.

A、The effect of the greatest invention B、The development of the Internet C、The movement of new technology D、The history of the World Wide Web

举一反三

阅读下列短文，根据短文内容，回答下列问题。
                                                                                   Save water, save lives
   A BOTTLE of water may not seem like much to you, but it can save the day for people who live in drought-hit (遭受旱灾) areas in China.
In the past few months, some places in southwest China experienced a serious drought. In Yunnan, Guangxi, Sichuan, Guizhou and Chongqing, there has been very little rain since last autumn. Crops died, the land cracked, and wells (井) and rivers dried up. More than 20 million people are having difficulty finding safe drinking water.
   After learning about the drought, many people around the country helped by giving water, money and other resources.
   Last week, China asked every member of the Communist Youth League (团员) and Young Pioneers (少先队员) to give one bottle of water to the drought-hit area. Students in primary schools and middle schools quickly joined the activity.
   “A bottle of water isn't much, but thousands of bottles will be of great use,”said Zhang Zihao, a middle school student at Tongling No 1 Middle School in Anhui.
   In Yuhua Primary School in Xi'an, 900 students bought over 100 bottles of water with their pocket money. They also wrote their wishes on the bottles.
   The serious drought has also made students realize the importance of saving water.
Students from Nanshan Middle School in Huizhou in Guangdong went on the street to tell people to take part in water-saving activities.
“I heard that some children in drought-hit areas don't have enough drinking water. They have to drink muddy (泥泞的) water. I feel really sad about that,” said one student. “I decided to take a shower twice a week instead of every day to save water.” he said.

Cats' sense of smell is very important to their health. Many cat owners have seen a cat smell the food and refuses it. Careful sniffing tells the cat if something is safe to eat.
Cats have a pair of vomeronasal organs(犁鼻器) on the roof of the mouth. When the cat wants to sniff, she will breathe the air in through her mouth. At this moment, she will often squint(斜视) her eyes and maybe even flatten(使…平坦) her ears. This makes her look like she is making faces. The vomeronasal organs will then analyze the smell—almost as if the cat is tasting the smell.
When you come home from outside the house, your cat can smell what you had for lunch and for a mid-afternoon snack. She can smell the people you shook hands with and your neighbour you stopped to talk to and hug. She can smell the grass brought under your shoes as you took a shortcut across the lawn. Your cat's sense of smell is so good that she can smell difference between a gallon of water with a teaspoon of salt in it and plain water. In comparison, we think of salt as completely tasteless.
Cats have scent glands(臭腺) on each side of the forehead, on the chin, the lips and next to the tail. When your cat rubs up against your hand, your leg, the sofa, and your bed, she is leaving her scent in those things. She will then use her sense of smell to recognize “her” things, people and even other pets in the home.
If you want to have fun with your cat's sense of smell, take some small bits of different things, such as a bit of chicken, some flowers and some fish. Place each different scent under a piece of paper towel(so your cat cannot see any of them) and encourage your cat to investigate and find what kind of food she likes to eat best.

阅读理解
    You may have noticed that the world's population is not evenly distributed (分散式的) around our planet. There are some countries where people seem to be living nearly on top of each other because conditions are overcrowded. Then there are others where it seems that hardly anybody lives. What influences this unequal distribution of people? There are specific advantages and disadvantages of living in a certain area.
    The two main factors that influence people's choice of location are climate and resources. Climate is the usual weather conditions in a region. Areas that have bad weather are generally less deal as places to live in. The north and south poles at the top and bottom of the world may be beautiful in their rugged, natural way, but the disadvantage of the bitterly cold and windy conditions usually keeps people away. When it comes to climate, warm conditions and a normal amount of rainfall are advantage that attract people.
    Natural resources are things that we get from nature and that help us survive. Each region offers different resources, and therefore attracts different groups of people. People who enjoy the beach can make their living by catching and selling the ocean's many fish and other sea creatures. Those who prefer farming can take advantage of rich soil (土壤) in valleys near rivers. Some people are willing to accept the disadvantages of the terrible conditions of deserts or mountains in order to take advantage of the resources like oil or woods.

阅读理解

Find Which Direction Is South

Do you have a good sense of direction? If not, please take with you a compass. But if you forget to take a compass, you can still find your way.

It's never a wise idea to believe that the family member who was good at the job of map-reading knows where the family is. You can tell by the troubled look on their faces that nothing on the ground seems to match the map. Never mind. The sun is shining and it's still morning. If you don't know the exact time, you can still find out where south is, but you'll need to be patient.

①Find a straight stick and put it in the ground in a place where you can mark its shadow(a dark shape on a surface that is made when something stands between a light and the surface).

②Try to position the stick as vertically(垂直)as you can. You can check this by making a simple plumb line(铅锤线). You haven't got one? OK, use a thread(线) from your clothes with a button(纽扣) tied at the end to act as a weight.

③Mark the end of the shadow cast(投射) by the stick.

④Wait about half an hour and mark the end of the shadow again.

⑤Keep doing this until you have made several marks.

⑥The mark nearest the stick will represent the shortest shadow, which is cast at midday, when the sun is highest in the sky and pointing to the exact south.

⑦Pick a point in the distance along the line between the shortest shadow and the stick.

⑧That point is south of where you are.

⑨Now you can turn the map, like you did before, and find which way you should be travelling.

阅读理解

The Earth is our home; we must take care of it. This means keeping the land, air and water clean. Pollution is a dirty word. To pollute means to make things unfit or unclean to use. Pollution comes in many ways. We see it, smell it, taste it and drink it. Pollution is beginning to threaten (威胁) our health, our happiness and our life. Man has been polluting the earth from the time he first made fire, washed his clothes in the river and threw his waste on the ground. When land was used up or water became dirty, men moved on to another place. At first, the problem was not so serious because there was plenty of clean air, land and water. There weren't so many people then and their wants were fewer. All the dirty things could be absorbed (吸收) by nature and soon covered over. But this is no longer true. The increase of population and the development of industry(工业)have changed that. Man is slowly poisoning (毒害) his environment. Through the use of poison, man has polluted the land, killing the animals. By putting dirty water and chemicals into rivers and lakes we have polluted our drinking water, killing the fish.

Our increasing population is part of the problem. More people, more waste.

Where is this all to end? Are we turning the world into a big rubbish dump (堆存处), or is there any hope that we can get rid of (摆脱, 除去) the pollution? Luckily, millions of people have been warned of the danger of pollution. Large numbers of people are now working hard to bring pollution under control.

阅读理解

3D printing is becoming more and more popular. We are now able to print things such as clothing, prosthetic limbs (假肢), musical instruments(乐器) and so on. People and businesses are able to create the things they need very quickly and easily using 3D printers.

But can you imagine printing food? Some scientists are trying to revolutionize our eating experience by doing this. They hope that having a 3D printer in the kitchen will become as usual as the microwave or blender. Scientists say that they are easy to use: you simply have to choose a recipe and put the food "inks" into the printer. You can also change the instructions to make the food exactly how you want it. This means that it would be very quick and easy to create delicious meals.

Using 3D printers to create your meals would also be saving the environment. There would be less need for traditional growing, transporting(运输) and packaging as food production would be quicker and easier.

Printing food could also help people who suffer from dysphasia (吞咽障碍症). They could program (为…编程) the printer to print softer versions of their favorite foods so that they would not have trouble eating them.

However, some people think that the future of 3D-printed food would be a disaster. It could take away many jobs, including those for growing, transporting and packaging food. Imagine a world where there was no need for farming or growing crops and the same tastes could be printed from a raw "food ink". Similarly, traditional cafes and restaurants might lose business. Also, there are worries about the printed food: is it really possible to get the nutrients (营养物) we need from food-based inks and gels?

What's more, cooking and eating together with family and friends has long been a traditional and enjoyable activity. It is hard to imagine a world where the fun of cooking is dead and meals can be done at the touch of a button.

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