欧美日韩黄网欧美日韩日B片|二区无码视频网站|欧美AAAA小视频|久久99爱视频播放|日本久久成人免费视频|性交黄色毛片特黄色性交毛片|91久久伊人日韩插穴|国产三级A片电影网站|亚州无码成人激情视频|国产又黄又粗又猛又爽的

相關(guān)習(xí)題
 0  89522  89530  89536  89540  89546  89548  89552  89558  89560  89566  89572  89576  89578  89582  89588  89590  89596  89600  89602  89606  89608  89612  89614  89616  89617  89618  89620  89621  89622  89624  89626  89630  89632  89636  89638  89642  89648  89650  89656  89660  89662  89666  89672  89678  89680  89686  89690  89692  89698  89702  89708  89716  151629 

科目: 來源: 題型:閱讀理解

Back in old times, people had little knowledge about the universe and nature. Things we now consider to be common sense were mysteries to our ancestors.
Over the years, major breakthroughs have been made in science and many phenomena have been explained. But still, there are always questions we can't yet answer, and The Guardian has listed some of them.
1. What makes us human?
Just looking at your DNA won't tell you - human DNA is 99 percent identical to that of the chimpanzee and, believe it or not, 50 percent identical to a banana's! A lot of the things we once thought were unique about us - language and tool use, recognizing ourselves in the mirror and so on – have since been seen in other animals. Perhaps it's our culture that makes the difference or maybe our ability to use fire. It's also possible that our capacity (能力) for co-operation and our trading skills are what make us unique.
2. Why do we dream?
Given the fact that we spend around a third of our lives sleeping, shouldn't we know everything about it? Unfortunately, scientists are still searching for a complete explanation of what happens when we sleep and why we dream.
Austrian psychologist Sigmund Freud believed dreams were the expressions of wishes that we can't fulfill in our real lives. Others have wondered whether dreams are just random "noise" coming from a sleeping brain.
3. Could we someday live forever?
Apart from accidents, most people die because of diseases that can be treated and aging. And since many diseases, such as diabetes(糖尿。 and cancer, are diseases of aging, treating aging itself could be the key to extending our lives.
Our knowledge of what causes us to age - and what allows some animals to live longer than others - is expanding rapidly. And though we haven't quite worked out all the details, we've worked out some pieces of the puzzles such as DNA damage and metabolism (新陳代謝), which are all leading to the invention of drugs that can slow down the aging process.
If we're lucky enough to lengthen our lives, we might even get to see the day when all of these questions are answered.
【小題1】The main point of the passage is ______.

A.to inform people of the knowledge about the universe and nature
B.to introduce major breakthroughs that have been made in science
C.to present some questions we can't yet answer
D.to explain what were once mysteries to our ancestors
【小題2】Chimpanzees and bananas are mentioned as examples to prove that ______.
A.human beings are actually not different from other animals
B.a(chǎn)nimals have completely different DNA from that of plants
C.both animals and plants share the same amount of DNA
D.DNA alone is not good enough to make humans different
【小題3】The underlined word "identical" is closest in meaning to ______.
A.mysterious B.unique C.a(chǎn)dvanced D.same
【小題4】Which of the following statements is TRUE according to the passage?
A.What were mysteries to our ancestors are considered to be common sense now.
B.Now we know much more about dreams than our ancestors did in the past.
C.With the invention of new drugs people can possibly live even longer.
D.If all the diseases can be treated people can theoretically live forever.

查看答案和解析>>

科目: 來源: 題型:閱讀理解

People have always been dreaming of going to the moon. As long as the year 1901, H. G. Wells, an English writer, wrote a book vividly describing a trip to the moon. On landing there, the explorers discovered that the moon was full of underground cities. Words failed to express their surprise when they spotted so many “moon people”. The “moon people” felt even more surprised. “Why,” they asked, “are you traveling to outer space when you don’t even use your inner space?”
H. G. Wells could only imagine a travel to the moon. In 1969, human beings really left their footsteps on the moon. People today know that there are no underground cities on the moon. However, the question that the “moon people” asked is still an interesting one. A growing number of scientists are seriously thinking about it.
Underground systems are already in place. Many cities have underground car parks. In some cities, such as Tokyo, Seoul and Montreal, there are large underground shopping areas. The “Channel”, a tunnel connecting England and France, is now complete.
But what about underground cities? Japan’s Taisei Corporation is designing a network of underground systems, called “Alice Cities”. The designers imagine using surface space for public parks and using underground space for flats, offices, shopping, and so on. A solar dome (太陽能穹頂) would cover the whole city.
Supporters of underground development argue that building down rather than building up is a good way to use the earth’s space. The space, they say, can be used for farms, parks, gardens, and wilderness. H. G. Wells’ “moon people” would second it. Would you?
【小題1】The explorers in H. G. Well’s story were surprised to find that the “moon people”     .

A.knew so much about the earth
B.understood their language
C.lived in underground cities
D.were advanced in technology
【小題2】What does the underlined word “it” (paragraph 2) refer to?
A.Discovering the moon’s inner space
B.Using the earth’s inner space
C.Meeting the “moon people” again
D.Traveling to outer space
【小題3】What sort of underground systems are already in place?
A.Offices, shopping areas, power stations.
B.Tunnels, car parks, shopping areas.
C.Gardens, car parks, power stations.
D.Tunnels, gardens, offices.
【小題4】 We can learn from the text that     .
A.H. G. Wells once went to moon himself.
B.Underground cities are more comfortable.
C.The solar dome is a necessary part of underground cities.
D.More underground systems will be in place in 2013.
【小題5】What would be the best title of the text?
A.Alice Cities — cities of the future
B.Space travel with H. G. Wells
C.Enjoy living underground
D.Building down, not up

查看答案和解析>>

科目: 來源: 題型:閱讀理解

Many animals recognize their food because they see it. So do humans. When you see an apple or a piece of chocolate you know that these are things you can eat. You can also use other senses when you choose your food. You may like it because it smells good or because it tastes good. You may dislike some types of food because they do not look, smell or taste very nice. Different animals use different senses to find and choose their food. A few animals depend on only one of their senses, while most animals use more than one sense.
Although there are many different types of food, some animals spend their lives eating only one type. The giant panda eats only one particular type of bamboo. Other animals eat only one type of food even when given the choice. A kind of white butterfly will stay on the leaves of a cabbage, even though there are plenty of other vegetables in the garden. However, most animals have a more varied diet. The bear eats fruits and fish. The fox eats small animals, birds and fruits. The diet of these animals will be different depending on the season.
Humans have a very varied diet. We often eat food because we like it and not because it is good for us. In countries such as France and Britain, people eat foods with too much sugar. This makes them overweight, which is bad for their health. Eating too much red meat and animal products, such as butter, can also be bad for the health. Choosing the right food, therefore, has become an area of study in modern life.
【小題1】We can infer from the text that humans and animals ____.

A.depend on one sense in choosing food
B.a(chǎn)re not satisfied with their food
C.choose food in similar ways
D.eat entirely different food
【小題2】Which of the following eats only one type of food?
A.A white butterfly.B.A small bird.
C.The bear.D.The fox.
【小題3】Certain animals change their choice of food when ____.
A.the season changes
B.the food color changes
C.they move to different places
D.they are attracted by different smells
【小題4】We can learn from the last paragraph that ____.
A.food is chosen for a good reason
B.French and British food is good
C.some people have few choices of food
D.some people care little about healthy diet
【小題5】What will most probably be talked about in the next paragraph?
A.Why choosing the right food is important.
B.How to choose the right food.
C.The right amount of food for a person.
D.Vegetables matter more than meat and sugar.

查看答案和解析>>

科目: 來源: 題型:閱讀理解

Researchers found that walking around with a forced smile and fake (假的) happiness simply leads to people feeling unhappier. So, putting a brave face on your sadness could be harmful. The research also found that women suffered more than men when pretending to be happy.
Dr. Brent Scott, who led the study, said employers should take note because forcing workers to smile when dealing with the public can result in bad outcomes. He said, “Smiling for the sake of smiling can lead to emotional tiredness, and that’s bad for the organization.” He also said the research showed customer-service workers who had “fake smiles” throughout the day fell into a bad mood and didn’t want to work, so their productivity dropped.
The study is one of the first of its kind to examine emotional expressions over a period of time and compare the different effects on men and women. Dr. Scott’s team examined the effects of “surface acting”, or fake smiling, compared to “deep acting”, or making people smile by thinking of pleasant memories.
Dr. Scott said, “Women were harmed more by surface acting, meaning their moods worsened even more than men’s. However, they were helped more by deep acting, which means their moods improved more by thinking of pleasant memories. ”
According to Dr. Scott, women tend to suffer more when pretending to be happy because they are expected to be more emotionally expressive than men. Therefore, forcing a smile while feeling down is more likely to go against their normal behavior and cause more harmful feelings.
Although deep acting can improve moods a little in the short term, Dr. Scott says, it’s not a long-term solution to feeling unhappy. “There have been some suggestions that if you do this over a long period you start to feel unreal. You’re trying to develop positive emotions, but at the end of the day you may not feel like yourself any more.”
【小題1】According to the passage, Dr. Scott’s study ______.

A.is supported by some big employers in the USA
B.is meaningful as there haven’t been many similar ones
C.examined more women than men for a long time
D.a(chǎn)imed to make the employees more productive
【小題2】Women suffer more from fake happiness mainly because ______.
A.they usually become shy in public places
B.they are supposed to be more emotionally expressive
C.they are often treated in a terrible way
D.they like thinking of pleasant memories
【小題3】It is implied in the passage that deep acting _____.
A.doesn’t have any effect on men
B.cannot improve our moods in any case
C.harms our feelings in the long run
D.pleases people by feeling like another person

查看答案和解析>>

科目: 來源: 題型:閱讀理解

Today is National Bike-to-Work Day. And on New York City’s jammed streets, people are cycling on hundreds of miles of new bike lanes. But New York’s widespread efforts to make streets safer for bikes have also left some locals complaining about the loss of parking spots and lanes for cars.
When the weather is good, Aaron Naparstek likes to pedal(用踏板踩)his two young kids to school on a special Dutch-made bicycle. Naparstek supports the new lane.
Aaron: The bike lane on Prospect Park West is really introducing a lot of new people to the idea that it’s possible to use a bike in New York City for transportation or to travel around. This is what 21st century New York City looks like.
Prospect Park West is still a one-way road, but where it used to have three lanes of car traffic, now it has two, plus a protected bike lane. Supporters say that makes the road safer for everyone, including pedestrians, by slowing down cars and taking bikes off the sidewalk. But some longtime residents disagree. Lois Carswell is president of a group called Seniors for Safety. She says the two-way bike lane is dangerous to older residents who are used to one-way traffic.
Lois: We wanted a lane — the right kind of lane that would keep everybody safe, that would keep the bikers safe. But we want it to be done the right way. And it has not been done the right way.
Craig Palmer builds bars and restaurants in Manhattan. I was interviewing him for a different story when he brought up the bike lanes all on his own.
Craig: I think the biggest problem is that Bloomberg put all these bike lanes in. You took what used to be a full street and you’re shrinking it.
Then there are the Hasidic Jews in Williamsburg, Brooklyn, who forced the city to remove a bike lane through their neighborhood. But polls show that the majority of New Yorkers support bike lanes by a margin of 56% to 39%. Bicycle advocate Caroline Samponaro of Transportation Alternatives calls that a mandate.
Caroline: If this was an election, we would have already had our victory. The public has spoken and they keep speaking. And I think, more importantly, the public is starting to vote with their pedals.
【小題1】What does Aaron mean by saying “This is what 21st century New York City looks like.”? 

A.There are hundreds of miles of new bike lanes in 21 st century New York City. 
B.Drivers slow down their cars and bikes are taken off the sidewalk in New York. 
C.Bikes are used as a means of transport in 21 st century New York City. 
D.It’s possible to make the streets safe for pedestrians in New York. 
【小題2】According to the passage, which of the following CANNOT support the opponents of these new bike lanes?
A.Drivers lose parking spots and lanes for cars. 
B.The two-way bike lane is dangerous to older residents. 
C.We took what used to be a full street so the road is broader than before. 
D.The removal of one bike lane through a neighbourhood in Brooklyn was not supported by the majority of New Yorkers. 
【小題3】“A mandate” in Paragraph 8 was referred to a demand or command from _______.
A.the authority B.the public C.the supporters  D.the government 
【小題4】What of the following might be the best title of the passage?
A.Ride on National Bike-to-Work Day 
B.A New Bike Lane Appears in New York 
C.A Bike Lane Divides New Yorkers 
D.Who Wins an Election 

查看答案和解析>>

科目: 來源: 題型:閱讀理解

Dan Bebber is a senior research fellow at the University of Exeter in Britain. He says research has shown that wild plants and animals are moving toward Earth's North and South poles as the planet warms.
Mr Bebber wanted to know if the same thing was happening with organisms that attack agricultural crops. He examined reports of first sightings of new insects and diseases around the world. The records came from CABI - the Centre for Agricultural Bioscience International. He says the group began collecting information from developing and industrialized countries years ago.
Dan Bebber and his research team studied 612 different organisms - from viruses and bacteria to insects like beetles and butterflies. They found that since 1960, crop pests and diseases have been moving toward the poles at an average rate of about 3 kilometers each year. Mr Bebber says this puts the most productive farmland in the world in danger.
"As new species of pests and diseases evolve and potentially the environment for them becomes more amenable at higher latitudes, the pressure on the breadbaskets of the world is going to increase."
Farmers face other threats. Invasive species passed through trade are also causing problems. Gene Kritsky is an Entomologist at the College of Mount St. Joseph in Ohio. He specialises in the study of insects. He says climate change may improve conditions for some invasive species.
“It means that species in other parts of the world that might do well in warmer temperatures can now do well in the breadbasket of America.”
Another Entomologist Christian Krupke of Purdue University says the effects of these changes will depend very much on the crop, the insect and the disease. But he says the research is a warning sign that people should care about climate change and do something about it.
【小題1】The purpose of Dan Bebber’s research was to find ______.

A.if farmland could be moved to colder places thanks to global warming
B.if diseases and insects harmful to crops were going towards colder areas
C.if organisms were moving to the north and south poles
D.if the number of crop pests was increasing
【小題2】According to Dan Bebber, if crop pests keep moving towards the poles, ______.
A.it will be hard for farmers to kill them
B.the most productive farmland will produce more crops
C.the earth will not produce enough food to support the world
D.the conditions for some crops may be improved
【小題3】Which of the following is not a threat that farmers have to face?
A.Climate change helps crop pests to adapt to new environment.
B.Foreign species are brought in by trade.
C.Invasive species doing well in warmer places might do well in America.
D.The impacts of the climate and species changes on crops are not easy to determine.
【小題4】The underlined word “amenable” in the fourth paragraph most probably means ______.
A.a(chǎn)greeableB.terribleC.unfriendlyD.changeable

查看答案和解析>>

科目: 來源: 題型:閱讀理解

In July 1994 Jupiter, the largest planet in our solar system, was struck by 21 pieces of a comet(彗星). When the fragment(碎片)landed in the southern part of the giant planet, the explosions were watched by scientists here on earth. But what if our own planet was hit by a comet?
The year is 2094. It has been announced that a comet is heading towards the Earth. Most of it will miss our plant, but two fragments will probably hit the southern part of the Earth. The news has caused panic.
On 17 July, a fragment four kilometers wide enters the Earth’s atmosphere with a huge explosion. About half of the fragment is destroyed. But the major part survives and hits the South Atlantic at 200 times the speed of sound. The sea boils and an enormous wave is created and spreads. The wall of water rushes towards southern Africa at 800 kilometers an hour. Cities on the African coast are totally destroyed and millions of people are drowned. The wave moves into the Indian Ocean and heads towards Asia.
Millions of people are already dead in the southern part of the Earth, but the north won’t escape for long. Tons of broken pieces are thrown into the atmosphere by the explosions. As the sun is hidden by clouds of dust, temperatures around the world fall to almost zero. Crops are ruined. Wars break out as countries fight for food. A year later civilization has collapsed. No more than 10 million people have survived.
Could it really happen? In fact, it has already happened more than once in the history of the Earth. The dinosaurs(恐龍)were on the Earth for over 160 million years. Then 65 million years ago they suddenly disappeared. Many scientists believe that the Earth was hit by a space fragment. The dinosaurs couldn’t survive in the cold climate that followed and they became extinct. Will we meet the same end?
【小題1】Which of the following is NOT TRUE according to the author’s description of the disaster in 2094?

A.The whole world becomes extremely cold.
B.All the coastal cities in African are destroyed.
C.The whole mankind becomes extinct.
D.The visit of the comet results in wars.
【小題2】Why does the author mention dinosaurs at the end of the passage?
A.Because they could only live in the warm climate.
B.Because they once ruled the Earth.
C.Because their extinction shows future disasters.
D.Because dinosaurs and humans never live in the same age.
【小題3】In writing the passage, the author intends to_________.
A.give an accurate description of the possible disaster in the future
B.prove that humans will sooner or later be destroyed
C.tell the historical development of the Earth
D.warn of a possible disaster in the future
【小題4】It can be concluded that the passage is most probably part of a(n)________.
A.terror story B.news report
C.research paper D.a(chǎn)rticle of popular science

查看答案和解析>>

科目: 來源: 題型:閱讀理解

Scientists say they now have proof to support the old-fashioned advice that it's best to sleep on a problem. They say sleep strengthens the memory and helps the brain organize the masses of information we receive each day.
Lead researcher Bob Stickgold at the Harvard Medical School said, "Sleep helps us draw rules from our experiences. It's like knowing the difference between dogs and cats even if it's hard to explain."
The US research team studied how well students remembered connections between words and symbols (象征) , reports New Scientist. They compared how the students performed if they had had a sleep between seeing the words and having the test, and if they had not slept. They found that people were better able to remember lists of related words after a night's sleep than after the same time spent awake during the day. They also found it easier to remember themes (主題) that the words had in common. But they forgot around one in four more themes if they had been awake. Prof. John Groeger, of Surrey University's Sleep Research Centre, said, "People have been trying for years to find out what the purpose of sleep is, as we know that only certain parts of it have a restorative (有助恢復(fù)的) value. " "We form and store huge numbers of experiences in the head every day, and sleep seems to be the way the brain deals with it all."
【小題1】The phrase" to sleep on a problem" in Paragraph 1 most likely means to______.

A.pay full attention to a problemB.wait until later for a decision
C.sleep to forget a problemD.have difficulty sleeping
【小題2】In the study by the US research team, students were asked to______.
A.put together words of similar meanings
B.remember words and their meanings
C.show their knowledge of words
D.make up lists of related words
【小題3】Which of the following may be easier to remember?
A.Themes learned right before the test
B.Rules from personal experience
C.Words learnt before a good sleep
D.Ideas stored together in the brain
【小題4】What may be the importance of the research?
A.It shows sleep may help us manage information
B.It helps find out the common themes of word
C.It tells us that more sleep can improve health
D.It proves the value of old-fashioned advice

查看答案和解析>>

科目: 來源: 題型:閱讀理解

In all the world's cultures, people sing, play instruments, and celebrate with music. It plays such an important role in our lives that all fields focus on its study, including one looking at the biology of music. Experts are finding that because of the way our brains process music, learning to play an instrument or just listening to music can have a wide range of benefits.
Music education has received a lot of attention. Learning to play an instrument can help children improve math, science, and language skills. One study in Canada tracked children's IQ scores for nine months, discovering that children who studied music had the biggest test score improvements. The secret may lie in the way reading music and playing notes uses several areas of the brain, increasing our ability to learn school subjects. For example, reading notes improves spatial (空間的) reasoning skills, which are helpful in solving math problems like fractions(分?jǐn)?shù)).
Music is also used for medical purposes, such as the treatment of diseases which affect memory. The secret lies in the way the brain processes music. One area near the forehead, the medial prefrontal cortex, connects music with memories stored in two other areas: the amygdale and hippocampus. That's why an old song can remind you of something that happened years ago. For patients suffering from diseases like Alzheimer's, listening to music can help unlock buried memories by strengthening musical pathways to memories.
With the evidence of music's benefits pouring in, it's no wonder some countries make  music study a part of their education systems. People are recognizing that more than just a  form of entertainment, music is also great for the brain.
【小題1】Scientists are studying music because _______.

A.music can be used for medical treatments
B.music plays a very important role in our lives
C.our brains can possess music in different ways
D.music education has received a lot of attention
【小題2】According to the Canadian study, which children had increased IQ scores?
A.Those who already had high IQs.
B.Those who had always played music.
C.Those who could not play any instrument.
D.Those who studied music for a period of time.
【小題3】 Which of the following is a kind of disease?
A.Spatial reasoning. B.Alzheimer's.
C.The amygdale and hippocampus. D.The medial prefrontal cortex.
【小題4】What can be the best title for the text?
A.Music and health B.Music and the mind
C.Music and education D.Music and instruments

查看答案和解析>>

科目: 來源: 題型:閱讀理解

About ten men in every hundred suffer from color blindness in some way. Women are luckier, only about one in two hundred is affected in this matter. Perhaps, after all, it is safer to be driven by a woman!
There are different forms of color blindness. In some cases a man can not see deep red. He may think that red, orange and yellow are all shades of green. Sometimes a person cannot tell the difference between blue and green. In rare cases an unlucky man may see everything in shades of green - a strange world indeed.
Color blindness in human beings is a strange thing to explain. In a single eye there are millions of very small things called “cones”. These help us to see in a bright light and to tell difference between colors. There are also millions of “rods” but these are used for seeing when it is nearly dark. They show us shape but no color.
Some insects have favorite colors. Mosquitoes (蚊子) like blue but do not like yellow. A red light will not attract insects, but a blue lamp will. In a similar way human beings also have favorite colors. Yet we are lucky. With the aid of the cones in our eyes we can see many beautiful colors by day, and with the aid of the rods we can see shapes at night. One day we may even learn more about the invisible (看不見的) colors around.
【小題1】Why do some people say it is safer to be driven by women?

A.Women are more careful.
B.There are few color-blind women.
C.Women are fonder of driving than men.
D.Women are weaker but quicker in thinking
【小題2】This passage is mainly about ________.
A.color and its surprising effects
B.women being luckier than men
C.danger caused by color blindness
D.color blindness
【小題3】According to the passage, with the help of the “cones”, we can ________.
A.tell orange from yellow
B.see in weak light
C.kill mosquitoes
D.tell different shapes
【小題4】We can attract and kill mosquitoes by using a ________.
A.red light B.yellow light C.blue light D.green light

查看答案和解析>>

同步練習(xí)冊答案