You can’t see your sleeping pets brain waves, but its behavior can tell you when your cat might be dreaming. If you watch closely, you’ll see that as she falls asleep, her breathing becomes slow and regular with her body still. She has entered the first stage of sleep, called slow-wave sleep. After about 15 minutes you’ll notice a change in her breathing. Her eyes move under her closed lids, her paws twitch (抽动) and she flicks (尤指用手指或手快速地轻抚) an ear. She has entered dreaming. Although she twitches and makes little grunting (嘟嘟) noises, messages from her brain to the large muscles in her legs are blocked, so she can’t run about. She is in a state of “sleep paralysis (麻痹)”.
Michel Jouvet, a French scientist, interrupted their sleep paralysis. Even though they were completely asleep, the dreaming cats began to run for balls that Jouvet couldn’t see and arched (弓起) their backs at unseen enemies. He figures he was watching them act out their dreams! Obviously, the dreaming cats seemed to be practising important cat skills: following, pouncing (猛扑), and fighting.
In another study, Matt Wilson recorded rats brain waves while they learned mazes (迷宫). One day, he left the brain-wave-recording machine on while the rats fell asleep. The pattern of brain waves in the sleeping rats matched the pattern from the maze so closely that Wilson could figure out exactly which part of the maze each rat was dreaming about!
Many researchers now think that in both people and animals, one purpose of dreams is to practise important skills and figure out recent caning. This may explain why so many people dream about fighting and escaping, skills that were probably important to our ancestors, and why dreaming affects our ability to learn.
Do all animals dream? From looking at the brain waves of sleeping animals. How often animals dream seems to be tied to body size. Cats dream about every 15 minutes, mice every 9 minutes, and elephants every 2 hours. And though cows and horses usually sleep standing up, they only dream when lying down.
1.What does Michel Jouvet find in his study?
A. The dreaming cats are in a state of body paralysis.
B. The dreaming cats often practise their important skills.
C. The eyes of dreaming cats moved while bodies are still.
D. The muscles of the dreaming cats are blocked to move.
2.What can you know about dreaming from the passage?
A. Dreaming a lot can help humans learn more.
B. Learning mazes is the basic skill for cats to learn.
C. Rats often dreams to make certain their recent learning
D. Fighting and escaping are not important skills for ancestors.
3.Which animal may dream most frequently?
A. Rats. B. Dogs.
C. Cows. D. Elephants
4.How does the author develop his passage?
A. By making comparisons. B. By using figures
C. By telling stories D. By showing facts
高三英语阅读理解中等难度题
You can’t see your sleeping pets brain waves, but its behavior can tell you when your cat might be dreaming. If you watch closely, you’ll see that as she falls asleep, her breathing becomes slow and regular with her body still. She has entered the first stage of sleep, called slow-wave sleep. After about 15 minutes you’ll notice a change in her breathing. Her eyes move under her closed lids, her paws twitch (抽动) and she flicks (尤指用手指或手快速地轻抚) an ear. She has entered dreaming. Although she twitches and makes little grunting (嘟嘟) noises, messages from her brain to the large muscles in her legs are blocked, so she can’t run about. She is in a state of “sleep paralysis (麻痹)”.
Michel Jouvet, a French scientist, interrupted their sleep paralysis. Even though they were completely asleep, the dreaming cats began to run for balls that Jouvet couldn’t see and arched (弓起) their backs at unseen enemies. He figures he was watching them act out their dreams! Obviously, the dreaming cats seemed to be practising important cat skills: following, pouncing (猛扑), and fighting.
In another study, Matt Wilson recorded rats brain waves while they learned mazes (迷宫). One day, he left the brain-wave-recording machine on while the rats fell asleep. The pattern of brain waves in the sleeping rats matched the pattern from the maze so closely that Wilson could figure out exactly which part of the maze each rat was dreaming about!
Many researchers now think that in both people and animals, one purpose of dreams is to practise important skills and figure out recent caning. This may explain why so many people dream about fighting and escaping, skills that were probably important to our ancestors, and why dreaming affects our ability to learn.
Do all animals dream? From looking at the brain waves of sleeping animals. How often animals dream seems to be tied to body size. Cats dream about every 15 minutes, mice every 9 minutes, and elephants every 2 hours. And though cows and horses usually sleep standing up, they only dream when lying down.
1.What does Michel Jouvet find in his study?
A. The dreaming cats are in a state of body paralysis.
B. The dreaming cats often practise their important skills.
C. The eyes of dreaming cats moved while bodies are still.
D. The muscles of the dreaming cats are blocked to move.
2.What can you know about dreaming from the passage?
A. Dreaming a lot can help humans learn more.
B. Learning mazes is the basic skill for cats to learn.
C. Rats often dreams to make certain their recent learning
D. Fighting and escaping are not important skills for ancestors.
3.Which animal may dream most frequently?
A. Rats. B. Dogs.
C. Cows. D. Elephants
4.How does the author develop his passage?
A. By making comparisons. B. By using figures
C. By telling stories D. By showing facts
高三英语阅读理解中等难度题查看答案及解析
You can’t see it with your own eyes，but your smart-phone is likely to be covered with bacteria- perhaps even more so than your toilet seat. That's a lot of dangerous microbes（微生物）floating around, and yes, it is terribly dirty.
In this age of global travel and trade, it’s more important than ever to cut down on possible routes of infection and to stop bacteria and viruses spreading from person to person. Part of that means making sure your phone isn’t sending anything more than data.
And besides the potential health risks of a dirty phone, there's also the simple annoyance of looking at a screen that’s covered in fingerprints and other oily spots that are part of life with a smart-phone.
In short, you’ve got plenty of reasons to regularly give your phone a thorough clean. Not just during a pandemic（大流行病），either-we should be thinking about keeping our phones bacteria free all the time, says microbiologist Paul Turner, a professor at Yale University.
After all, we touch our phones all the time and many of us are relatively careless about cleaning them. “It sets the stage for kind of concern,” Turner says. “People could be handling phones and picking up any bacteria or virus that can attach to a surface and survive for a period of time.”
Take SARS-CoV-2, the corona- virus（冠状病毒）that causes the COVID-19, for example. Scientists are still trying to get solid evidence, but early research suggests that it can survive on plastic or stainless steel（不锈钢）surfaces for two or three days. That means you could be washing your hands perfectly well, but immediately picking the virus up again as soon as you reach for your phone.
You could be doing everything right（like washing your hands and staying away from people），but
if there’s a contaminated surface in your home or your pocket, you could expose yourself to the virus anyway, Turner says.
1.Why does the author mention the toilet seat?
A.To draw a vivid picture of a dirty phone.
B.To show how dirty a toilet seat is.
C.To add some background information.
D.To introduce a topic for discussion.
2.What can we learn in Paragraph 6?
A.Simply washing our hands is not enough.
B.Scientists have got solid evidence of the COVID-19.
C.The corona-virus can survive on smooth surfaces for 2 or 3 weeks.
D.The author suggests washing our hands before using our phones.
3.What do the underlined words “contaminated surface” refer to in the last paragraph?
A.A stainless steel. B.A deadly virus.
C.A clean phone. D.An infectious phone.
4.What is the main idea of the text?
A.You may get infected with your dirty phone.
B.You are supposed to wash your hands.
C.You’d better clean your dirty phone.
D.You’d better throw away your dirty phone.
高三英语阅读理解困难题查看答案及解析
__1._. You don’t show your secret personality when you are awake because you can control your behavior, but when you are asleep, your sleeping position shows the real you. __2.__. The important position is the one that you go to sleep in.
If you go to sleep on your back, you’re a very open person. You normally trust people and you are easily influenced by fashion or new ideas. You don’t like to displease people. So you never express your real feelings. __3.__.
If you sleep on your stomach, you are a rather secretive person. You worry a lot and you’re always easily upset. You always stick to your own opinions or judgment, but you aren’t very ambitious. __4.__. This means that you enjoy having a good time.
If you sleep curled up, you are probably a very nervous person. You have a low opinion of yourself and so you’re often delusive(不真实的，虚假的 ).You’re shy and you don’t normally like meeting people. You prefer to on your own, You’re easily hurt.
If you sleep on your side, you have usually got a well-balanced personality. _5.__.You’re usually careful. You believe in yourself. You sometimes feel anxious, but you don’t often get sad. You always say what you think even if it makes people rather angry.
A. You’re quite shy and you aren’t quite sure of yourself
B. You know your strengths and weaknesses
C. Normally people seldom change their sleeping position
D. Everyone has got two personalities—the one that is shown to the world and the other that is secret and real
E. Maybe you don’t want to make friends with a person who sleeps curled up
F. You usually live for today not tomorrow
G. In a normal night, of course, people frequently change their positions
高三英语七选五困难题查看答案及解析
When your pet is sick, you know it needs medication. But pets, like babies, don’t know the pill you want them to take will help them. 1. Here are some tips to help get your pet to take liquid medicine.
2. If the answer is yes, then your easiest path is to mix it with canned food. First give your hungry pet a small amount of canned food without the medication. It’s important that the pet nibbles (啃) at the food and sees that there's nothing wrong.
Next, while the pet is still hungry, mix the medication in a small amount of food and present it. Repeat as necessary to get the entire dose (剂量) down. 3. If the pet decides not to finish the meal, the dose will be wasted.
If the chemist says the medication cannot be taken with food, you need a syringe (注射器) or a dropper to get the liquid down your pet’s throat.
4. Keep a cheerful tone in your voice so the pet doesn’t sense your stress or hesitation. Position your pet where it cannot run away, perhaps having a dog sit with his back against a wall or chair – or a cat on your lap.
5. Use your other hand to insert the syringe or dropper between the cheek and back teeth. Slowly squeeze the medication so the pet won’t choke. Try to keep your pet’s mouth closed for about 30 seconds until you see it has swallowed. If your pet is being obstinate (倔强的) , stroke its throat gently or blow on the face.
Be sure you end the process with praise and perhaps a treat so your pet will not associate medication with a bad experience.
A. Before you call your pet in, be sure to have the medication and any other materials you’ll need ready.
B. Once the pet is in position, use one hand to gently open the pet’s mouth from above, tilting back the head slightly.
C. Ask the vet if the liquid medication can be given with food.
D. You should know the reason why the pet refuses to take medicine.
E. Never mix the medication with the full meal.
F. They just know it smells funny and they don’t want it.
G. Don’t force your pet to swallow all the medicine.
高三英语信息匹配中等难度题查看答案及解析
When your pet is sick, you know it needs medication. But pets, like babies, don’t know the pill you want them to take will help them. 1. Here are some tips to help get your pet to take liquid medicine.
2. If the answer is yes, then your easiest path is to mix it with canned food. First give your hungry pet a small amount of canned food without the medication. It’s important that the pet nibbles (啃) at the food and sees that there's nothing wrong.
Next, while the pet is still hungry, mix the medication in a small amount of food and present it. Repeat as necessary to get the entire dose (剂量) down. 3. If the pet decides not to finish the meal, the dose will be wasted.
If the chemist says the medication cannot be taken with food, you need a syringe (注射器) or a dropper to get the liquid down your pet’s throat.
4. Keep a cheerful tone in your voice so the pet doesn’t sense your stress or hesitation. Position your pet where it cannot run away, perhaps having a dog sit with his back against a wall or chair – or a cat on your lap.
5. Use your other hand to insert the syringe or dropper between the cheek and back teeth. Slowly squeeze the medication so the pet won’t choke. Try to keep your pet’s mouth closed for about 30 seconds until you see it has swallowed. If your pet is being obstinate (倔强的) , stroke its throat gently or blow on the face.
Be sure you end the process with praise and perhaps a treat so your pet will not associate medication with a bad experience.
A. Before you call your pet in, be sure to have the medication and any other materials you’ll need ready.
B. Once the pet is in position, use one hand to gently open the pet’s mouth from above, tilting back the head slightly.
C. Ask the vet if the liquid medication can be given with food.
D. You should know the reason why the pet refuses to take medicine.
E. Never mix the medication with the full meal.
F. They just know it smells funny and they don’t want it.
G. Don’t force your pet to swallow all the medicine.
高三英语信息匹配中等难度题查看答案及解析
—You can have a pet dog，but suppose you get bored with it in a few days？________？
—We won't，we promise！(2011·安徽，29)
A．Then what B．All right
C．How come D．So what
高三英语单项填空中等难度题查看答案及解析
How would you like to sleep with one half your brain asleep and the other half awake? Dolphins sleep this way. Recently, scientists at Indiana State University have discovered that ducks sleep this way too. They found that ducks sleep half awake so they can rest and watch for danger at the same time.
After putting their ducks in a row and videotaping them, some researchers found ducks on the end of each row spent more time asleep with one eye open, apparently looking for predators.
“The more the ducks felt threatened, the more they slept with one eye open,” said lead author Niels C. Rattenborg, a graduate student at Indiana State University, Terre Haute. “The unique aspect is not that they do it, but that they control it. When they sleep at the edge of a group, they tend to realize greater danger, so they spend more time sleeping with one half of their brain.” Ducks with one eye open were still awake enough to detect predators, said the authors of the study, which appears today in the journal Nature.
The researchers studied four groups of four ducks held in plastic boxes, which were arranged in a row. Ducks on the end were found to sleep with one eye open 31.8 per cent of the time, compared to 12.4 percent of the time for ducks in the central position.
Also, ducks in the central position did not open one eye more than the others, while ducks on each end kept the eye facing away from the group open 86.2 per cent of the time. Brain wave readings of the ducks showed that the half of the brain receiving signals from the closed eye indicated that half of the brain was sleeping. Signals from the half of the brain receiving signals from the open eye showed a state between fully awake and asleep.
1.The under lined word “predator” is most likely to mean________.
A. an animal that is likely to be friends with ducks
B. a human being who looks after and feeds ducks
C. a scientist who does research work on animals
D. an animal that hunts, kills and eats other animals
2.Ducks at the end of each row sleep with one eye open because________.
A. they are looking for food
B. they are watching out for danger
C. they want to enjoy the scenery
D. they are unique in their sleeping habit
3.Which of the following is true according to the passage?
A. Ducks with one eye open at the edge can still enjoy a certain degree of sleep.
B. Ducks with less sense of duty usually choose to stay in the center of a row.
C. Ducks on the northern end of a row would keep their eye facing the south open.
D. A video tape recorder was the only electronic device used in the experiment.
高三英语阅读理解中等难度题查看答案及解析
It’s nearly noon on a Saturday and you can’t believe it: your teenager is still in bed, sleeping away. But before you wake him up---mumbling to yourself that you can’t believe what a lazybones he is---you should know that he probably needs all the zzzs he can get.
As much as nine hours of sleep a night, in fact. Furthermore, teens’ circadian rhythms (i.e., processes that occur once a day) mean that young people would rather stay up past midnight and rise after 9 a.m. The result? Many teens stay up late, drag themselves out of bed early for school and try to make up the sleep debt on the weekends---or in class!
“There’s a biological reason why teens stay up late and want to sleep late,” says Dr. Stan Kutcher, the Sun Life Chair of Adolescent Mental Health at Dalhousie University in Halifax. “Their natural sleep-wake cycle changes as part of the maturation process. And because of changes in their social activities, recovering from sleep debt is more problematic.”
Teens need extra sleep for several reasons. First, their brains are changing. “The brain is reorganizing itself, laying down new pathways. What we’re seeing is a relationship between brain redevelopment and an increased need for sleep,” says Kutcher. As well, growth hormones are released during sleep, so adequate sleep is crucial for adolescents’ physical development. In addition, everything adolescents have learned in school that day is being processed and locked into long-term memory during sleep. Sufficient sleep also plays a key role in overall physical health. The immune system, for example, needs deep sleep to become and remain robust(healthy).
Staying up late on school nights means that, on average, teens get between six and a half and seven hours of sleep a night---about two hours less than they need. As a result, many either doze off in class or have trouble concentrating. Some of the behavioural problems and irritability in teens can be linked directly to sleep deprivation(损失), Kutcher says.
Then there’s the breakfast issue. Dr. Carlyle Smith, a sleep researcher and a psychology professor at Trent University in Peterborough, Ont., adds that many teens simply cannot tolerate food when they first wake up, so skipping breakfast becomes another factor in reduced alertness in class. The most obvious solution to the teen sleep problem is to have school start later in the day, but initiatives(积极性) toward this across the country have gone nowhere, Smith says, mainly because of costs and resistance from school boards and teachers.
So for now, just sympathize with your teens. Encourage them to go to bed, if not early, then at least at a regular time, so they won’t develop insomnia from erratic(不稳定的) schedules. Warn them not to have too many caffeinated drinks before bed. And don’t let sleeping away the weekend become an issue to fight over. Schedule family activities to take place later in the day on weekends and let them sleep in. “If you want your kids to grow and remember stuff, let them sleep,” says Smith. “It’s not laziness. Their brains are working really, really hard.”
1.The word “zzzs” (Paragraph 1) most probably means __________.
A．food B．sleep C．energy D．blame
2.What causes teenagers to be less sleepy late at night and more sleepy early in the morning?
A．Caffeinated drinks.
B．Too much family activities.
C．Circadian rhythms.
D．Too much homework.
3.How many reason why teens need extra sleep are mentioned in Paragraph 4?
A．Three. B．Four. C．Five. D．Six.
4.One of the reasons why many teenagers fail to have better performances in class is that __________.
A．teenagers go to bed early and sleep late
B．teenagers stay up late and get up late
C．teenagers participate in too many social activities at night
D．teenagers skip breakfast because of sleeping in
5.The author wrote this article to __________.
A．advise parents to let sleeping teenagers lie
B．explain why teenagers often sleep late
C．state schools should start late in the day
D．warn teenagers not to drink coffee before bed
高三英语阅读理解中等难度题查看答案及解析
根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
When your pet is sick, you know it needs medication. But pets, like babies, don't know the pill you want them to take will help them. 1. Here are some tips to help get your pet to take liquid medicine.
2. If the answer is yes, then your easiest path is to mix it with canned food. First give your hungry pet a small amount of canned food without the medication. It's important that the pet nibbles (一点一点地吃) at the food and sees that there's nothing wrong.
Next, while the pet is still hungry, mix the medication in a small amount of food and present it. Repeat as necessary to get the entire dose (剂量)down. 3. If the pet decides not to finish the meal, the dose will be wasted.
If the chemist says the medication cannot be taken with food, you need a syringe (注射器) or a dropper (滴管) to get the liquid down your pet's throat.
4. Keep a cheerful tone in your voice so the pet doesn't sense your stress or hesitation. Position your pet where it cannot run away, perhaps having a dog sit with his back against a wall or chair ---- or a cat on your lap.
5. Use your other hand to insert the syringe or dropper between the cheek and back teeth. Slowly squeeze the medication so the pet won't choke. Try to keep your pet's mouth closed for about 30 seconds until you see it has swallowed. If your pet is being obstinate (倔强的) , stroke (抚摸) its throat gently or blow on the face.
Be sure you end the process with praise and perhaps a treat so your pet will not associate medication with a bad experience.
A. Before you call your pet in, be sure to have the medication and any other materials you’ll need ready.
B. Once the pet is in position, use one hand to gently open the pet's mouth from above, tilting(倾斜) back the head slightly.
C. Ask the vet(兽医) if the liquid medication can be given with food.
D. You should know the reason why the pet refuses to take medicine.
E. Never mix the medication with the full meal.
F. They just know it smells funny and they don't want it.
G. Don’t force your pet to swallow all the medicine
高三英语信息匹配中等难度题查看答案及解析
It sounds almost too good to be true，but a new study on sleeping brains suggests that listening to languages while you sleep can actually help you to learn them．
For the study，researchers played recordings of foreign words and their translations to subjects enjoying slow-wave sleep，a stage when a person has 1ittle consciousness of their environment．To ensure that the results were not compromised by foreign language words that subjects may have had some contact with at some point in their waking lives，researchers made up totally nonexistent foreign words．
When the subjects woke up，they were presented with the made-up words again without their translations．The subjects were then asked to imagine whether this made-up word indicated an object that was either smaller or larger．This vague(模糊的)way of testing their understanding of the words is an approach that is supposed to tap into the unconscious memory．
Unbelievably，the subjects were able to correctly classify the words in this way at an accuracy rate that was 10 percent higher than random chance．That’s not a rate high enough to have them suddenly communicating in a foreign tongue，but it is enough to suggest that the brain is still absorbing information on some level，even during sleep．
Researchers have long known that sleep is important for memory，but previously its role in memory was thought to relate only to the preservation and organization of memories acquired during wakefulness．This is the first time that memory formation has been shown to be active during sleep．
In other words，our brains are listening to the world，and learning about it，even when our conscious selves are not present．
The next step for researchers will be to see if new information can be 1earned quicker during wakefulness if it was already presented during sleep．If so，it could forever change how we train our brains to learn new things．Sleep learning might become a widespread practice．
1.Why did researchers use some made-up words in the study?
A.To guarantee the accuracy of the test result．
B.To increase the difficulty of testing information．
C.To avoid the subjects cheating in the experiment．
D.To test if our brain are good at learning something new．
2.What were the subjects asked to do in the study?
A.Classify what they heard by size．
B.Make up a word to represent“large”or“small”．
C.Repeat the words they heard in the sleep．
D.Imagine the meanings of the made-up words．
3.What conclusion did researchers draw from this study?
A.Sleep is necessary for a good memory．
B.Memory formation goes on during sleep．
C.Listening during sleep is good for our brain．
D.Learning languages in sleep has better effects．
4.What will be the researchers’next plan?
A.To train people how to learn during sleep．
B.To prove the existence of unconscious memory．
C.To dig out the reason for unconscious learning．
D.To study the effect of sleep learning on conscious learning．
高三英语阅读理解中等难度题查看答案及解析