①People who have dogs love to talk about dogs. If you have a dog or if you are friends with a dog owner, you are probably heard many interesting facts and stories about these four-leggged friends of ours. You may have heard someone say that dogs are color-blind. But is this true? Do you know anything about this fact?
②________ Just like us, dogs have retinas (视网膜). The retina is an important light-sensing structure. Dogs also have cone cells (视锥细胞) and rod cells (视杆细胞) in their retinas. The cone cells allow dogs to perceive (感知) color and see things in detail, while the rod cells help them see things in the dark and notice movement.
③Most humans have three kinds of con e cells: blue, red and green. They allow us to tell the difference between different colors. But dogs have only two kinds of con e cells. One kind is blue, and the other lies somewhere between red and green. Therefore dogs are unable to tell orange, red and green. They can only see things in yellow, blue, grey, brown, white and black. In other words, the vision (视力) of dogs is similar to that of a red-green color-blind man. Although they have fewer kinds of cone cells, dogs have more rod cells than humans. This allows them to see more clearly in the dark and notice movement more exactly than us. While a camper is spending a night outdoors with his dog, for example, the dog may suddenly stand up and stare into the darkness. This can be a little worrying for campers who are alone. The dog, however, may have simply seen a small mouse moving across the grass in the distance that we might never be able to see.
④The next time someone mentions that dogs are color-blind, you can remind them, “They’re red-green color-blind, to be exact.” While it may be true that our lovely animal friends see fewer colors, they can still see better than us in many other ways!
1. How does the writer start the passage?| A．By giving advice. | B．By raising questions. |
| C．By telling two stories. | D．By comparing numbers. |
| A．Dogs can see clearly in the dark. |
| B．Dogs have more cone cells than humans. |
| C．The rod cells help dogs see the world in the dark. |
| D．A dog’s eyes have many similarities with human eyes. |
| A．We know little about humans’ eyes. |
| B．Dogs can’t see orange, red and green things. |
| C．A dog can help us be careful at a camping night. |
| D．More tests will be done for finding more about dogs’ eyes. |
A． | B． | C． | D． |
相似题推荐
| A. Hi! I live in a zoo in the UK. Our kind is endangered. You can only find us in the wild in Madagascar. B. I’m a wild Siberian tiger. I was on news a few days ago because I hurt a villager on a farm in Mishan, Heilongjiang. My family mainly live in northeastern China but I lost my way those days. C. I’m a red kite. A cameraman is filming me. So I’m angry and trying to scare him. I have good eyesight. So even though the cameraman is far away, I can still see him. D. I’m a chimpanzee and I live in a zoo in Chongqing. When people are washing their clothes, I like to watch. Then I learned how to wash clothes myself. The zoo even gave me a prize for my hard work. E. I’m a little bear and climbing a hill with my mom in Spain. It is hard for me to climb, since I am still learning. My mother is behind me. She is teaching and protecting me. F. I’m a duck and my name is Kiwi. I couldn’t walk because I got hurt. People saved my life and made a wheelchair for me. I’m now learning to walk again. G. I’m a penguin and live at London Zoo. The zookeeper is helping all the penguins mail our Christmas wishes in hopes of getting fish from Santa. I’m looking forward to the gifts. |
【推荐2】Southern white rhinos (犀牛) mainly live in Africa. They are very large in size, about 4 metres long, 1.75 metres high, and over two tons in weight. There are two horns (角) on the nose. The front horn is over half a metre long, while the other one is smaller. Southern white rhinos are not really white. They are grey in colour. “White” may come from the Afrikaans word for “wide”. It has some connection with their wide mouths.
Southern white rhinos live on grass, leaves, fruit and so on. They have very poor eyesight. However, they have good hearing and an excellent sense of smell. Their skin (皮肤) is nearly 5 cm thick but is very sensitive. During the day, they try to find a cool place to avoid sunburn. Southern white rhinos lie in mud (泥浆) when they can, as it sticks to their skin and protects them from the bright African sun.
Some humans kill rhinos for their horns. They sell horns to those who believe horns have magic powers or can treat sickness. It puts southern white rhinos in danger.
Now many actions are taken to protect southern white rhinos. The international trade in rhino horn has been stopped in the world. Besides, many protected areas have been built, especially in South Africa. Up to 2020, more than 20 countries have made rules to protect southern white rhinos. Today the number of southern white rhinos has increased to over 20,000 in the wild.
根据语篇内容，选择最佳选项。1. Where do southern white rhinos mainly live?
| A．In Europe. | B．In America. | C．In Africa. |
| A．Red. | B．Blue. | C．Grey. |
| A．健康的 | B．敏感的 | C．光滑的 |
| A．For their horns. | B．For their meat. | C．For their noses. |
| A．Ways to feed southern white rhinos. |
| B．Actions of protecting southern white rhinos. |
| C．Places for southern white rhinos to live in. |
【推荐3】Owning a lovely pet can certainly make one’s family life better and it can make a difference to a pet owner’s career（职业）life, too. In fact, according to a new research, a person who owns a pet may be more successful in his or her career than those who don’t. This is good news for people who want to keep pets.
The researchers collected information from 857 adults in the United States with all kinds of jobs. Among the successful people in their careers, 93 percent grew up with a pet in their home. 78 percent said that growing up with a pet helped their career success as an adult.
So, how can owning pets exactly lead to career success? Well, according to the research, successful people said that their pets not only helped to teach them to be responsible, be creative and follow the rules, but also made them develop the abilities to understand others’ feelings and organize activities. They are both important and necessary in the business world.
According to the research, 86 percent of present pet parents said owning pets helped them do things on time, better manage their time and put more efforts into work. In fact, 80 percent of present pet parents said they felt more connected with those who were pet owners, and they believed that their workers who had pets were hard workers.
1. A pet owner may ________ than those who don’t keep pets.
| A．spend more money | B．do better in the job |
| C．be much happier | D．be healthier |
| A．93% | B．78% | C．86% | D．7% |
| A．It can help people obey the rules. |
| B．It can make people become good followers. |
| C．It can help people become brave. |
| D．It can make people experience others’ feelings. |
| A．are difficult to get along with | B．are easy to find |
| C．are stronger than others | D．are hard-working |
| A．it is very important to keep a pet |
| B．keeping a pet can only help its owner succeed |
| C．keeping a pet can influence its owner both in life and career |
| D．how to become a successful person |
【推荐1】You and I can tell one face from another, but can computers do the same with few mistakes? At an earlier time, many people thought it was impossible, but now, the development of technology has made it come true.
New technology like facial recognition (脸部识别) technology helps to make our lives better and more convenient in many ways. People can easily come into their office buildings and check e-mails by using it. It can also help the police to find missing kids and bad people by sending the pictures taken from video cameras on the streets to the facial recognition system. More and more shoppers use their e-wallets with the new technology to pay for things they buy in the shopping malls and many kinds of stores.
In the fall of 2017, Apple even used this technology to open the smart-phone in no more than one second. However, what is facial recognition technology and how does the system make it?
First, facial recognition technology checks the space between eyes, the eye color, the ear size and the lip thickness. Then the system makes a record of your face and saves it in the database (数据库). That is to say, if you want to get the right to go into some places or to do something, you just look at the camera and let your picture run through the database.
Once the system checks your face and finds that it is correct, you can then get the right to go into the places or to do something.
However, is there any way to fool the facial recognition system? The answer is yes. Although it is an amazing technology, it sometimes doesn’t work. The following are some examples.
1. What can we know about facial recognition technology from Paragraph 2?| A．It helps us a lot in our lives. | B．It helps us go anywhere fast. |
| C．It lets stores make more money. | D．It is the most useful technology worldwide. |
| A．A special key. | B．A set of numbers. |
| C．Special patterns. | D．Facial recognition technology. |
| A．The camera. | B．The information of the face. |
| C．The smartphone. | D．The right place. |
| A．How the system works. |
| B．How much the system costs. |
| C．Why the system is so popular. |
| D．How many faces the system checks. |
| A．Why the technology is convenient. |
| B．When and where the technology can’t work. |
| C．How the technology becomes more popular. |
| D．Who can make the most use of the technology. |
【推荐2】Boys and girls, let’s do an experiment in today’s lesson.
Things you need to prepare:
Instructions:
1. Fill the bowl or glass about 2/3 full with water.
2. Drop the egg carefully into the bowl and watch it going down towards the bottom.
3. Take the egg out and add about 5 spoons of salt. Test to see if your egg goes up.
4. Add more salt if the egg is still at the bottom.
The science behind it:
Things go down in the water when they are denser(密度更大的) than the water. By adding salt we make the water denser. Once the water is denser than the egg, it goes up.
You can also try other things to see if you can have the same result.
Example in daily life:
The Dead Sea is the lowest sea in the world. The Dead Sea has a high concentration(浓度) of salt. So there is nothing living in the Dead Sea. As the experiment above, people can also float(漂) in it. But it is not good to float for a long time.
1. What kind of lesson are the students having?| A．Maths. | B．History. | C．Physics. | D．Geography. |
| A．3. | B．4. | C．5. | D．6. |
| A．The egg is broken. |
| B．Half of the water is poured out. |
| C．The egg is denser than the water. |
| D．The water is denser than the egg. |
| A．We just fill the bowl or glass about 1/2 full with water. |
| B．Adding salt will make water lighter. |
| C．People can float in the Dead Sea. |
| D．Eggs can float in any liquid. |
Humans have many ways to communicate like making phone calls, writing messages, or talking face to face.
Just like humans, some insects use sound to communicate. Male crickets (蟋蟀) can “sing” by rubbing their legs on their wings. The sound is an invitation to female crickets, which says, “I’m here! Come on over!”
Bees use their sense of smell to communicate, too.
Bees also communicate in another way. After a bee finds food, it goes back to its hive and does a dance. Other bees around it can feel the dance moves.
Insects also use touch to communicate, such as ants. When an ant is following a leader, it will tap (轻拍) the leader’s legs with its antennae (触须).
| A．Insects don’t have these choices. |
| B．The dance’s pattern gives them directions to the food. |
| C．Other insects use their sense of smell to communicate. |
| D．That tells the leader that the other ants are keeping up. |
| E．Ants use their antennae to communicate with their leaders. |
| F．If a bee sees an enemy, it produces a pheromone that tells the other bees to attack. |
Research has shown that it is difficult to concentrate on(专注于) driving and talking at the same time. It can even be more dangerous than driving after drinking too much. A recent study found that when drivers were talking on their mobile phones, their stopping times were 30 percent slower than when they had drunk too much - and nearly 50 percent slower than when they were driving normally. It also found that drivers talking on mobile phones were less able to control their cars than drunk drivers.
And talking isn't even the most serious problem, but texting is. Unbelievably, another recent study reported that 22% of adults admitted(承认) they had sent a text message while driving at least once in the past month. An average(平均的) text message takes 90 seconds to write and send. That means for one and a half minutes a driver is looking at their phone's screen and not at the road. The arrival of new smart phones such as the iPhone will only make things worse as they will allow users to do more things than ever before.
Using a mobile phone while driving puts others' lives at risk. No matter how well we drive, if another driver is*not careful, we are put in danger by their actions. Such drivers are selfish, careless and should have their driving licenses (驾照) cancelled.
There is no doubt that mobile phones can be fun and are useful, especially when you're in trouble.
But there is no need to use them while driving. Just wait until you stop or you will probably get into trou-ble of your own.
1. The underlined word "them" in Paragraph l refers to _ .
| A．phone users | B．mobile phones |
| C．drivers | D．ears |
| A．12 | B．13 | C．14 | D．15 |
Dangerous→More dangerous→Most dangerous .
| A．drinking→talking on phone→texting |
| B．texting→talking on phone→drinking |
| C．talking on phone→drinking-→texting |
| D．drinking→texting→talking on phone |
| A．It will take longer to send text messages. |
| B．People will want to talk on their phones more often. |
| C．There will be more things for people to do with their phones. |
| D．People think the new phones are easier and safer to use. |
【推荐2】As usual, Amber was hurrying to catch the yellow school bus. Luckily the traffic lights turned green as she was to cross the road, so she made it. When the bus passed a golden arch（拱形门）, it reminded her of a hamburger. She hadn’t had breakfast that morning because the fruit salad on the blue dish didn’t look delicious at all. However, Amber remembered that she was still on a diet. So now she was really in a black mood.
You may have noticed that several colours were used in the above story so as to help describe Amber’s morning. In fact, colours influence your life more than you can ever imagine. Take language for example: You may describe a sick person as being “a bit green”. To describe a depressed（沮丧的） person, you say that the person is “feeling blue”. In short, colours do add interest to daily conversations.
Besides, colours can be used in many parts of your daily life. Have you ever thought about why many school buses and taxis are painted yellow, and stop signs red? Since yellow is the most eye-catching colour, it can catch people’s attention, especially in heavy traffic. As for red, it is the colour which usually shows warning. As a result, some traffic signs use this colour. For the same reason, hot- water taps are usually marked red.
The colours of a dining environment possibly decide how much you eat. Most fast-food restaurants are often decorated in bright colours such as red, yellow, orange, and white for the purpose of increasing people’s appetites（胃口）. This is because bright colours are natural colours found in many foods, and, therefore, able to raise people’s spirits. Blue, in comparison（对比）with bright colours, is said to lower people’s appetites because few foods are blue in nature. For those who are on a diet, blue dishes and bowls might help!
“Morning, Amber! What happened? You look a bit green,” said Violet, Amber’s best friend.
“Nothing… just feeling … blue,” said Amber.
“Hey! Come to my place tonight. Do you know what I just bought? A phone! It’s red-hot.”
Amber was tickled pink to have the chance to play with the phone and said, “Sounds great!”
1. According to the passage, if you are on a diet, ________ might help.| A．putting your food in a blue dish or bowl | B．turning on a yellow light during the meal |
| C．painting the walls of the dining room white | D．covering the dining table with an orange cloth |
| A．it tells other drivers to prepare to stop | B．it helps bus drivers stay in a good mood |
| C．it can easily catch other people’s attention | D．it is the colour that most school children like |
| A．Colours influence people’s daily lives. | B．Most fast-food restaurants are painted grey. |
| C．Different colours are used for different purposes. | D．Colours make daily conversations more interesting. |
| A．Amber was not fat at all. | B．Amber cheered up at Violet’s invitation at last. |
| C．Violet didn’t know how colours influenced our lives. | D．The arch is painted gold only to make it beautiful. |
【推荐3】If we want to grow as people, we cannot just depend on our own evaluation (评价) of how we are doing. We also need to know what other people think about our performance. Receiving feedback (反馈) from others can help us see the larger picture and show us a way to success. However, someone has to give that feedback, and sometimes, that someone will be you. How should you deal with this?
First, if you notice a situation in which some feedback would be helpful, give it as soon as you can. If you wait until the matter disappears from the person’s mind, they might not understand what you’re trying to tell them. Take the person to a safe, comfortable place and offer your advice in private (私下地).
Second, when you’re giving feedback, it’s important to keep in mind that no one likes to be told they’re doing a bad job. Make sure you give an equal (相等的) amount of good feedback to balance out (平衡) anything bad. Like the saying goes, “A spoonful of sugar helps the medicine go down”.
All good feedback shares something in common. First, it should help achieve a goal. It’s less useful to tell your friends that their dish tastes “interesting” than to suggest adding a little salt. Feedback should also look toward the future. You can’t change what’s already happened, but you can prevent it from happening again. Tell your friends they should take more notes in class instead of talking about how they should have studied harder for a big exam they failed.
Finally, don’t think your suggestion is the only correct way to deal with a situation. You might even get some feedback on your feedback. Don’t get unhappy at this — it can only help you give better advice next time.
1. Why is feedback from others important for us?| A．We are not doing well in our study or work. |
| B．Receiving feedback from others may help us succeed. |
| C．Other people’s ideas about our performance are always correct. |
| D．Feedback is the most important for teenagers to grow as people. |
| A．You might forget to tell the person later. |
| B．Perhaps the person wants the feedback right away. |
| C．Maybe the person needs time to understand your advice. |
| D．If you wait too long, the person might forget what’s happened. |
| A．It’s difficult to do a good job all the time. |
| B．It’s helpful to keep on giving bad feedback. |
| C．It’s better to balance good and bad feedback. |
| D．It’s important to think twice before giving feedback. |
| A．The characters included in good feedback. |
| B．The way for people to give feedback properly. |
| C．The differences between good and bad feedback. |
| D．The importance of giving and receiving feedback. |
