Do you know why different animals or pests have their special colours? Colours in them seem to be used mainly to protect themselves.
Some birds like eating locusts, but birds cannot easily catch them. Why? It is because locusts change their colours together with the change of the colours of crops. When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown colour as crops have. Some other pests with different colours from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.
If you study the animal life, you’ll find the main use of colours is protecting themselves. Bears, lions and other animals move quietly through forests. They cannot be seen by hunters. This is because they have the colours much like the tree.
Have you ever noticed an even more strange act? A kind of fish in the sea can send out a kind of very black liquid when it faces danger. While the liquid spread over, the enemies cannot find it. And it immediately swims away. So it has lived up to now though it isn’t strong at all.
1. From the passage we can learn that locusts ________.A.are small animals |
B.are easily found by birds |
C.are dangerous to their enemies |
D.change their colours to protect themselves |
A.They run away quickly. |
B.Their colours are much like their enemies. |
C.They hide themselves in the day and appear at night. |
D.They have to move quietly. |
A.have the colours much like the trees |
B.move quickly |
C.like brown and grey colours |
D.live in forests |
A.it is very big and strong |
B.the liquid it sends out can help it escape from its enemies |
C.the liquid it sends out can kill its enemies |
D.it swims faster than any other fish |
A.The Change of Colours for Animals and Pests |
B.Colours of Different Animals and Pests |
C.The Main Use of Colours for Animals and Pests |
D.Some Animals and Pests |
相似题推荐
【推荐1】Hello, I’m Lily. Look! It is my classroom and it is blue and white. Four nice jackets are in the classroom. They are white, blue, red and black. The blue jacket and the black jacket are on a desk. The white jacket and the red jacket are on a chair. I know that the boys’ jackets are not red and the girls’ jackets are not black. What color is Lucy’s jacket? I don’t know. But I know it is not blue. Jack says, “My jacket is white.” What color are Jim’s and Cindy’s jackets?
1. Which is blue and white?A.The bag. | B.The desk. |
C.The classroom. | D.The quilt. |
A.Lily’s. | B.Jim’s. |
C.Lucy’s. | D.Jack’s. |
A.Lily’s classroom | B.Five students |
C.The nice colors | D.Four jackets |
【推荐2】We can see lots of different kinds of food with different colors on our dining tables. Doctors and our parents always ask us to eat lots of green vegetables, because they are healthy for us. It’s also good for us to have food in other colors. For example (例如), we can have red food like tomatoes and carrots, yellow food like bananas, brown food like chocolate and orange food like oranges. Most people like to eat red food.
But what about blue food?
A food company (公司) has a test. The workers put (放) the color blue in its candies (糖果). Children like the color blue very much, so would they like the blue candies? The test finds that children don’t like them at all. They still like red, green, brown, yellow and orange candies.
How many kinds of blue fruits or vegetables do you know? You can see a little blue food in your life. People may think blue is not a food color and that it’s not safe (安全的) or healthy to eat the food that is blue. People find many blue plants are poisonous, and animals are afraid to eat them. This is why people don’t often use blue when they make drinks, cakes and other food.
1. What kind of food doesn’t the writer mention (提到) in the passage?A.Green food. | B.Yellow food. | C.Purple food. | D.Orange food. |
A.Different food colors in the world. | B.A test on blue candies. |
C.An old but great food company. | D.Children’s favorite candies. |
A.People don’t like to eat blue food. | B.Having blue food can help us to relax. |
C.People often use blue fruit to make drinks. | D.Children like blue candies very much. |
A.环保的 | B.芳香的 | C.柔软的 | D.有毒的 |
A.Habits and Likes. | B.Colors and Food. | C.Health and Sports. | D.Jobs and Hobbies. |
【推荐3】Green is an important color in nature. It is the color of grass and the leaves on trees. It is also the color of most growing plants.
Sometimes, the word "green" means young, fresh and growing. For example, a greenborn is someone who has no experience. In the 15th century, a greenborn was a young cow or an ox whose horns(角) had not yet developed. A century later, a greenborn was a soldier who had no experience in war. By the 18th century, a greenborn had the meaning it has today—a person who is new in a job.
Someone who is good at growing plants is said to have a green thumb(大拇指). The expression comes from the early 20th century. A person with a green thumb can make plants grow quickly and well. The Green Revolution(绿色革命) is the name given some years ago to the development of new kinds of rice and other grains. It was the result of hard work by agricultural scientists who had green thumbs.
Green is also the color used to describe the powerful feeling jealousy(嫉妒). The green eyed monster isn't a dangerous animal from outer space. It is an expression used about 400 years ago by the British writer William Shakespeare in his play "Othello". It describes the unpleasant feeling when someone has something he wants.
In most places in the world, a green light is a signal(信号) to move ahead. In everyday speech, a green light means approval(赞成) to continue with a project.
1. A new solider was called a greenborn in the ________ century.A.15th | B.16th | C.18th | D.20th |
A.is good at growing plants | B.really has a green thumb |
C.has no experience in war | D.is new in a job |
A.he sees a dangerous animal | B.he can't get something |
C.he reads a sad play | D.his friend gets a prize that he wants |
A.Green, the color of grass and trees | B.The stories about the color "green" |
C.Green, a sign of approval | D.Different meanings of "green" |
【推荐1】In many science fiction (科幻) movies, men travel to faraway stars and even fight with aliens. But are there real aliens in the universe (宇宙)? The answer of some scientists is yes. So they have been searching for aliens in outer space for many years. They hope io find life signs of aliens.
Some scientists are used to using radio telescopes (望远镜) to search for aliens in space. In order to find aliens, they have worked hard for over half a century, but so far they have found nothing. Then some scientists guessed aliens might not want to connect us, but aliens could answer our messages. So some scientists sent radio signals into the universe. They hope one day they would be picked up by alien technology. These scientists want to prove (证明) that we are not alone in the universe.
But what should we do if the “alien phone” rings one day? Should we answer it? Stephen Hawking, the famous physicist, thought it could be dangerous to connect aliens. He said that the main purpose of aliens’ visiting to our solar system could be searching for our resources (资源). But other scientists think we have no need to worry. David Morrison. a NASA scientist, said, “If an alien radio signal reaches the earth from a planet thousands of light-years away, then they almost surely have solved all the problems we still have including the short of resources. Maybe they are much smarter than us, but why don’t they hurt us? I think we can try to connect them.”
根据短文内容,选择最佳答案
1. ______ scientists believe there are aliens.
A.Few | B.Some | C.Most | D.All |
A.more than 50 years | B.50 years | C.40 years | D.30 years |
A.Aliens are dangerous. | B.Aliens are friendly. |
C.Aliens can’t be found. | D.Aliens have been on the earth. |
A.Because we want to find aliens. | B.Because aliens are much smarter than us. |
C.Because we want to help aliens. | D.Because aliens have many skills. |
A.How to Use Radio Telescope. | B.Stephen Hawking’s Idea. |
C.Protect Our Earth. | D.Are We Alone? |
【推荐2】①How good are you at remembering names, dates, and telephone numbers? It is not easy for all. Remembering things is one of the most interesting functions (功能) of the human brain. That’s why scientists spend so much time studying how it works.
②Studies show that when we learn something new, it stays in our memory for 20-30 seconds. This is our short-term memory. Remembering a phone number long enough to find a piece of paper is an example. The opposite of short-term memory is long-term memory, which is where things are stored in the brain for a long time. The brain can turn short-term memory into long-term memory. For example, when studying for an exam, instead of just reading the information once or twice, you might go over your notes again and again until you can remember the important information.
③Dave Farrow is known for his excellent memory. He has been listed twice in Guinness (吉尼斯) World Records for Greatest Memory. As a student, Dave had great difficulties in learning. He found some ways to improve his memory in order to do well in school. Here are some you can try.
④One way is to look at the first letter of each word you want to remember. Then, make your own word or sentence using all of those letters. For example, if you want to remember all the colours in a rainbow, try remembering the name Roy G. Biv. Each letter in this name matches the first letter of a colour: red, orange, yellow, green, blue, indigo and violet. Another way is to remember information in groups. For example, when you remember a telephone number, remember three numbers as a group, the next four numbers as a group and the final four numbers as a group. This way, your brain only has to remember three things instead of 11.
⑤If you are interested in improving your memory, apart from using some ways to remember things, there are lots of simple things you can do, like eating healthily, sleeping well and exercising daily. Challenging your brain also helps you keep it healthy and active. So, why not start playing mind games, learning a musical instrument or studying a new language?
1. What can we learn from Paragraph 2?A.Short-term memory is less important than long-term memory. |
B.The information needed for an exam stays in short-term memory. |
C.People store new information in long-term memory by going over it. |
D.Our short-term memory can hold information for more than half a minute. |
A.describe how people remember things | B.show the importance of a great memory |
C.tell people to use some ways to improve memory | D.give a reason why people need to improve memory |
A.Some advice to improve memory. | B.Some activities to challenge the brain. |
C.Some advantages of playing mind games. | D.Some reasons for keeping the brain active. |
A.①/②/③④/⑤ | B.①②/③/④/⑤ | C.①/②/③/④/⑤ | D.①②③/④/⑤ |
【推荐3】Today there are 6 billion people on the earth. By the year 2050 there may be 12.5 billion. This is a lot of people to feed. We need more food. One way to produce more food is by growing stronger plants. For thousands of years, farmers have made plants better. Every season, they pick the best plants for the next season. It works very slowly. Since 1983, scientists have been able to change plants more quickly by changing their genetic material(遗传物质). Food from plants grown in this way are called genetically modified foods or GM foods.
By changing the genetic material of a plant, it is possible to make new plants. They make plants which are strong against plant diseases. They can also help in our diseases: a kind of rice is being prepared, for example, which stops people from becoming blind.
Rich countries produce GM foods because they are easy to grow and bring in more money. Poor countries are interested in them because they help produce more food, GM plants are not natural. No one knows how good or bad they are. Making GM foods is only one way of feeding people in 2050. There are strong feelings against them, because they are unnatural. They may feed people, then hurt them or their children later. But both rich and poor countries are very interested in their use, and they are not going to go away. In 2050 we may think differently about them.
1. GM foods are made by ________.A.farmers | B.workers | C.scientists | D.plants |
A.They make plants strong against diseases. | B.They are unnatural. |
C.They can help in human diseases. | D.Both A and C. |
A.are a quick way to produce food | B.grow in wild |
C.are safe | D.are grown only in rich countries |
A.They are not useful. | B.They are not helpful. |
C.They are not natural. | D.They are not cheap. |
A.GM foods will disappear one day in the future | B.GM foods will not disappear in the future |
C.People will not be interested in GM foods | D.People will have to stop using GM foods |
【推荐1】Drones(无人机)can do a lot of things for us, taking photos, delivering things from packages to pizzas to beer and following wild animals. But they have other uses now.
Can you believe it? Drones can serve people coffee. US company IBM has made this kind of drone. It can deliver coffee to sleepy people. The drone can know when to bring a cup of coffee by studying a person's data. Then, the drone will fly to the person. There is a special device(设备)under the drone. It helps the drone to give people coffee. The drone can also learn about someone's coffee-drinking habits and predict when someone needs their next cup of coffee.
Drones can also save lives. One company in Africa use drones to deliver medicine and blood fast and save many people's lives. The drones are able to fly at speeds of up to 60 mph and when they are within a minute of the destination(目的地), the doctors receive a text and wait nearby. The drones drops off the package and then returns to its home.
A 92-year-old hunter in Virginia was lost and had to spend a night in the woods. The police searched for him all night but failed to find him. Luckily, the drone tracked him down in 20 minutes. Also, drones helped the firefighters know about the fire in the wildfire fight.
1. How many uses of drones did the writer talk about in the passage?A.4. | B.5. | C.6. | D.7. |
A.Doctors use drones to save animals' lives in Africa. |
B.Drones can only deliver packages in the wild. |
C.The drone helped to find the lost 92-year-old man. |
D.The drones can help make coffee at home. |
A.In a travel guide. | B.In a story book. | C.In a science book. | D.In a cooking book. |
A.Drones have many uses. | B.Drones can save lives. |
C.Drones can give people coffee. | D.Drones can find the lost. |
【推荐2】Three people were siting around a table in a restaurant in Brazil. How much do you think each of them tipped(给小费)? The British asked. “It’s common to tip 10 percent, right?” The American woman cried. “Oh, I was planning to leave 20 percent!” And the Chinese asked. “What’s a tip?”
Although it is not a custom to tip in China, tipping is a big deal in Western countries. When travelling to countries like the US and Canada, it is common to tip about 10 to 15 percent of the bill.
Usually, people give tips to a waiter or waitress when they eat in a restaurant. The US tops the list of the biggest restaurant tips, with waiters and waitresses expecting to get 10 to 25 percent of the total bill.
So if you order $ 100(about 662 yuan) worth of food, you are expected to pay your waiter at least $15, making your total payment $ 115.
But why is this? Many waiters and waitresses get paid below the US minimum wage(最低工资) and work for tips to make up for(弥补) that. According to the American travel website, some states pay their servers(服务员) only $2.13 per hour. It is not just for waiters, either. Hotel maids, hairdressers and taxi drivers also usually work for tips.
Besides the US, tipping is also popular in some Southeast Asian countries, such as Indonesia and Thailand. However, in Japan there is a no-tipping culture and you may actually offend the waiter if you try to give him money.
1. Tipping is a big deal in ________ countries.A.Southern | B.Western | C.Asian | D.Eastern |
A.Because it is advised by the travel website. | B.Because waiters will offer better service. |
C.Because servers there are not well paid. | D.Because people have much money. |
A.冒犯 | B.表扬 | C.嘲笑 | D.移动 |
A.tipping is popular in US | B.people in some Southeast Asian countries also tip |
C.tipping is a big deal in Western countries | D.it is OK to tip a waiter in Japan |
【推荐3】Emergency (紧急情况) Numbers in Different Countries
Emergencies always happen every day in every country. What will you do if you meet with an emergency? If you don’t know what to do, just remember some emergency numbers. When an emergency happens, stay calm (冷静的), take out your mobile phone, and call the emergency number you need. Different countries have different emergency numbers.
The USA
In the USA, remember to call 911 when you are in an emergency. The number 911 connects callers to emergency services (服务). It can tell the place of the caller’s mobile phone.
The UK
In the UK, people call the number 999 when they are in an emergency. Each call centre has interpretation (翻译) services with 170 languages.
South Korea
The emergency number 112 is only for police in the country. Most of the telephone operators (接线员) speak Korean. But there are some operators who speak English, Chinese or Russian. They can offer better service for foreigners.
China
In China, 110 is a 24-hour emergency number. Each telephone operator answers 800 to 1, 000 emergency calls every day. Operators should work on an emergency call in 57 seconds. The police need to get to the scene (现场) in five minutes in cities. In the area which is far away from the town or city, it is 10 minutes.
1. If you are in London, which number can you call when you are in an emergency?A.999. | B.911. | C.112. | D.110. |
A.Chinese | B.English | C.German | D.Russian |
A.In 5 minutes. | B.In 10 minutes. | C.In 15 minutes. | D.In 20 minutes. |
A.Four countries’ emergency numbers are mentioned in the passage. |
B.The number 911 can’t tell the position of the caller’s mobile phone. |
C.In Britain, call centres have interpretation services with 100 languages. |
D.In China, operators should work on an emergency call in 30 seconds. |
A.Stay calm and just take a deep breath. | B.Remember to call the emergency number you need. |
C.Call the number 119 at once. | D.Call your friends for help at once. |