Global warming is when the earth heats up,the temperature rises.It happens when greenhouse gases—carbon dioxide,water vapor,nitrous oxide(二氧化氮),and methane(沼氣) trap heat and light from the sun in the earth’s atmosphere,which increases the temperature.This is like when heat is trapped in a car.On a very hot day,the car gets hotter when it is out in the parking lot.This is because the heat and light from the sun can get into the car,by going through the windows,but it can’t get back out.Once the light is inside the car,it is trapped and the heat builds up,just like it does in the earth’s atmosphere.This is what the greenhouse effect does to the earth.The heat and light can get through the atmosphere,but it can’t get out.As a result,the temperature rises.
Sometimes the temperature can change in a way that helps us.The greenhouse effect makes the earth appropriate for people to live on.Without it,the earth would be freezing,or on the other hand it would be burning hot.We would not get the sun’s heat and light to make the night somewhat warm.During the day,especially during the summer,it would be burning because the sun would be up with no atmosphere to filter(過(guò)濾) it,so people,plants,and animals would be exposed to all the light and heat.
Although the greenhouse effect makes the earth able to have people living on it,if there gets to be too many gases,the earth can get unusually warmer,and many plants,animals,and people will die.They would die because there would be less food (plants like corn,wheat,and other vegetables and fruits).This would happen because the plants would not be able to take in the heat.This would cause us to have less food to eat,but it would also limit the food that animals have.Gradually,people,plants,and animals would all die of hunger.
People are doing many things to try to stop global warming.One thing people are doing is carpooling.Carpooling is driving with someone to a place that you are both going to.This minimizes the amount of greenhouse gases put into the air by a car.
Another thing that people are doing is being more careful about leaving things turned on like the television,computer,and the lights.A lot of people are taking time away from the television,and instead,they are spending more time outdoors.This helps our planet out a lot.Now,more people are even riding buses,walking to school,and riding their bikes to lower the amount of greenhouse gases in the air.
Planting trees and recycling also help.If you recycle,less trash goes to the dump,and less trash gets burned.As a result,there are fewer greenhouse gases in our atmosphere.Although adults do many things to help stop global warming,kids can do just as much.
【小題1】By the example given in Paragraph 1,the author wants to ________.
A.explain how greenhouse gases work |
B.show his feeling in a car in hot summer |
C.tell us cars are causes of greenhouse gases |
D.say that there are greenhouse gases in every car |
A.light | B.heat |
C.temperature | D.greenhouse effect |
A.If there is greenhouse effect,all the plants will die. |
B.Human beings are likely to disappear from the earth. |
C.Crops can’t take the heat if there is greenhouse effect. |
D.Although greenhouse effect is necessary,too much of it causes us to die. |
A.Why cars and buses pollute the air a lot. |
B.What kids can do to help stop global warming. |
C.What global warming is doing to the environment. |
D.Who should be responsible for the environmental problems. |
【小題1】A
【小題2】D
【小題3】B
【小題4】D
解析【小題1】 A
解析 寫作目的題。通過(guò)這個(gè)例子作者形象地解釋了地球溫室效應(yīng)形成的原理。
2答案 D
【小題2】 代詞指代題。根據(jù)第二段第二句的內(nèi)容可知,溫室效應(yīng)使得地球適宜人類居住,故it指代溫室效應(yīng)。
【小題3】 D
解析 段落大意題。溫室效應(yīng)既有益處,也有害處,太多的氣體會(huì)使溫室效應(yīng)過(guò)度,導(dǎo)致動(dòng)植物死亡,人類也因此滅亡。
【小題4】B
解析 邏輯結(jié)構(gòu)題。文章最后三段談?wù)摰亩际浅扇藶楸Wo(hù)環(huán)境可以采取的行動(dòng),根據(jù)最后一句話“Although adults do many things to help stop global warming,kids can do just as much.”的提示,文章接下來(lái)可能會(huì)談?wù)搩和癁楸Wo(hù)環(huán)境能做的事情。
年級(jí) | 高中課程 | 年級(jí) | 初中課程 |
高一 | 高一免費(fèi)課程推薦! | 初一 | 初一免費(fèi)課程推薦! |
高二 | 高二免費(fèi)課程推薦! | 初二 | 初二免費(fèi)課程推薦! |
高三 | 高三免費(fèi)課程推薦! | 初三 | 初三免費(fèi)課程推薦! |
科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解
The weather is getting hotter. You are thirsty(口渴的) playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you are drinking. Something that looks cool may not be good for your health. There are plenty of “energy drinks” on the market. Most of them have beautiful colors and cool names. The lists on them tell you they are helpful to your health. Sounds great!
But after a careful check you may find that most energy drinks have lots of caffeine(咖啡堿)in them. These drinks are especially aimed at young people, students, busy people and sports players. Makers sometimes say their drinks make you better at sports and can keep you awake. But be careful not to drink too much. Caffeine makes your heart beat fast. Because of this, the International Olympic Committee(IOC)(國(guó)際奧委會(huì)) has limited its use. Caffeine in most energy drinks is at least as strong as that in a cup of coffee or tea. Possible health dangers have something to do with energy drinks. Just one box of energy drink can make you nervous, have difficulty sleeping and can even cause heart problems. Scientists say that teenagers should be discouraged from taking drinks with a lot of caffeine in them.
【小題1】Which of the following can be the best title of the passage? ______
A.What’s the Use of Energy Drinks? |
B.Who Can Drink Energy Drinks? |
C.What’s that in Energy Drinks? |
D.Why Can’t We Buy Energy Drinks? |
A.disliked | B.helped | C.stopped | D.encouraged |
A.energy drinks are especially aimed at teenagers |
B.energy drinks are helpful to teenagers’ study |
C.sports players need to drink a lot of energy drinks |
D.a(chǎn)dvertisements are important in getting people to buy energy drinks |
A.they have beautiful colors and cool names |
B.they have lots of caffeine |
C.they can keep them awake and better at sports |
D.they are said to be helpful to health |
查看答案和解析>>
科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解
Will online courses transform world of education?
Some may wonder what it feels like to attend a class at Stanford University. The recently popular MOOCs (Massive Open Online Courses) can satisfy this desire. But they are also most likely to change the situation of higher education. Only last month,both Peking University and Tsinghua University announced plans to start open online course on the edX platform,one of the world’s major providers of MOOCs,to explore this new form of online education.
Gaining momentum(勢(shì)頭)
“It’s not only a change of platforms from offline to online. It’s more about a reform of
teaching methods,even the whole education system,”said Chen Jining,president of Tsinghua University.
The potential of MOOCs to reform education has been obvious in the US ever since the immediate popularity of the course Artificial Intelligence,taught by Stanford University professor Sebastian Thrun, who later co-founded Udacity, a platform with 1.6 million enrolled(注冊(cè)) students in 200 countries. According to Nature magazine,by June 2013,74 percent of universities in the US offered some type of online course. Lu Fang, vice-president of Fudan University,explains the appeal of MOOCs as a simple case of supply and demand:“The demand for high quality educational resources from both enrolled students and professionals is feeding the rise of MOOCs,in which classes usually taught by top teachers are available to everyone,”said Lu.
Too early to replace
With easy access and free of charge, MOOCs are said to have the potential to change the present education system. But there are barriers,because hardly any universities offer degree certificates, as college administrators point out, it’s difficult to confirm if students are foaming anything in MOOCs,reposed USA Today.
The Wall Street Journal also reposed that,presently,a typical MOOC student is likely to have
already graduated from college and is using the course to explore an interest or acquire professional
skills. Even so, an increasing number of undergraduates are signing up.
“What we are really establishing(創(chuàng)建)are educational pathways for people who want skills that are related to contemporary jobs,”Thrun told The Wall Street Journal.
【小題1】MOOCs have been considered likely to reform education since___________.
A.the founding of Udacity |
B.the wide application of online education |
C.the popularity of the course Artificial Intelligence |
D.the opening of MOOCs on the edX platform in China |
A.high quality educational resources are in demand |
B.students can attend courses in famous universities |
C.college students have access to famous teachers |
D.MOOCs have brought about revolution in education |
A.Most of the MOOCs focus on professional training for college graduates. |
B.There are barriers for MOOCs to replace the present education system. |
C.International companies prefer applicants who graduate from MOOCs. |
D.More and more undergraduates have realized the limits of MOOCs. |
A.doubtful | B.negative | C.critical | D.optimistic |
查看答案和解析>>
科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解
Even plant can run a fever, especially when they’re under attack by insects or disease. But unlike human, plants can have their temperature taken from 3, 000 feet away straight up. A decade ago, adopting the infrared (紅外線)scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress. The goal was to let farmers precisely target pesticide (殺蟲(chóng)劑)spraying rather than rain poison on a whole field, which invariably includes plants that don’t have pest (害蟲(chóng))problems.
Even better, Paley’s Remote Scanning Services Company could detect crop problems before they became visible to the eye. Mounted on a plane flown at 3, 000 feet at night, an infrared scanner measured the heat emitted by crops. The data were transformed into a color-coded map showing where plants were running“fevers”. Farmers could then spot-spray, using 50 to 70 percent less pesticide than they otherwise would.
The bad news is that Paley’s company closed down in 1984, after only three years. Farmers resisted the new technology and long - term backers were hard to find. But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to get back into operation. Agriculture experts have no doubt the technology works. “This technique can be used on 75 percent of agricultural land in the United States, ” says George Oerther of Texas A & M. Ray Jackson , who recently retired from the Department of Agriculture, thinks remote infrared crop scanning could be adopted by the end of the decade. But only ff Paley finds the financial backing which he failed to obtain 10 years ago.
【小題1】 Plants will emit an increased amount of heat when they are______________.
A.sprayed with pesticides |
B.facing an infrared scanner |
C.in poor physical condition |
D.exposed to excessive sun rays |
A.estimate the damage to the crops |
B.measure the size of the affected area |
C.draw a color-coded map |
D.locate the problem area |
A.resorting to spot-spraying |
B.consulting infrared scanning experts |
C.transforming poisoned rain |
D.detecting crop problems at an early stage |
A.the lack of official support |
B.its high cost |
C.the lack of financial support |
D.its failure to help increase production |
A.the desire of farmers to improve the quality of their produce |
B.growing concern about the excessive use of pesticides on crops |
C.the forceful promotion by the Department of Agriculture |
D.full support from agricultural experts |
查看答案和解析>>
科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解
One of the most popular activities enjoyed by Americans is spending time in forests and walking along paths through the country.This activity,called hiking,has led to the creation of paths throughout the United States.
One of the longest is the Appalachian National Scenic Trail.The trail is the first completed part of the National Trails System.The trails system was established by Congress and the president in 1968.The Appalachian Trail is more than 3,400 kilometers long.It starts in the northeastern state of Maine and ends in the southeastern state of Georgia.The trail goes through 14 states.They are Maine,New Hampshire,Vermont,Massachusetts,Connecticut,New York,New Jersey,Pennsylvania,Maryland,West Virginia,Virginia,Tennessee,North Carolina,and Georgia.
The path takes walkers through the Appalachian Mountains.They extend from the Canadian province of Quebec to the southern American state of Alabama.
The Appalachian Mountains are among the oldest on Earth.They first began forming about one thousand million years ago.During the millions of years since then,the mountains were changed and reformed by the forces of water and wind.Ice also changed the mountains,making many of them smaller and digging valleys and lakes among them.Many different kinds of trees grow along the trail.And many different kinds of animals live in the forests along the trail.
Lands along the trail are protected by the federal government and by state governments.Some parts are not protected by the government directly.Instead,they are protected by legal agreements with private owners willing to permit people to walk across their property.
Walkers on the Appalachian Trail pass through some of the great valley systems of the mountains.They can look down into these beautiful valleys and see farms and forests stretching across the land for many kilometers.Farmland in the valleys is rich and productive.And some of the great events in American history took place in the valleys.For example,one of the great battles of the American Civil War was fought in the Shenandoah Valley in Virginia.
【小題1】The Appalachian Trail________.
A.is more than four thousand three hundred kilometers long |
B.starts in the northern state of Maine |
C.goes through more than fourteen states |
D.ends in the southeastern state of Georgia |
A.a(chǎn)re the first completed part of the National Trails System |
B.began forming one million years ago |
C.were changed by natural forces like water,wind and ice |
D.were around by valleys and rivers and famous for its scenery |
A.a(chǎn)re protected entirely by either the federal government or state governments |
B.a(chǎn)re mainly protected by legal agreements with private owners |
C.can be visited by travelers freely only under the permission of owners |
D.a(chǎn)re protected by both the federal government and state governments |
A.The Appalachian Mountains have some great valley systems. |
B.Farms and grasslands stretch across the valleys for many kilometers. |
C.One of the American independence battles was fought in the Shenandoah Valley. |
D.Lakes in the Appalachian Mountains are one of the most beautiful sights. |
查看答案和解析>>
科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解
Even while in a deep sleep, people can still learn brand new information. Sleepers soak in new associations between smells and sounds, knowledge that lingers(逗留)into the next waking day, researchers report online August 26 in Nature Neuroscience.
The new study is the first to show that entirely new information can get into the sleeping mind, says Anat Arzi of the Weizmann Institute of Science in Israel. "The brain is not passive while you sleep. It's quite active. You can do quite a lot of things while you are asleep."
But the results don't mean that Spanish vocabulary tapes now have a place on the nightstand. L, Researchers have tried but largely failed to find evidence that complicated information, such as new pairs of words, can make its way into the brain during sleep.
Instead of trying to teach people something complicated like a new language, Arzi and her colleagues relied on the sense of smell and hearing. As anyone who has walked by a dumpster(垃圾車)in July knows, smells can cause a nose-jerk reaction. Catching a bad smell automatically makes people inhale(吸氣)less, reducing the size of the inhale. But scent of fresh bread causes a long, deep inhale.、rzi and her team took advantage of this reaction for their experiment.
As people slept in the laboratory, the researchers delivered pleasant scent, such as shampoo. As this nice smell got into the sleepers' noses, the researchers played a particular music. Later, a disgusting smell, such as rotten fish or meat, was paired with a different music. Neither the smell nor the sound woke people up. After just four exposures to the smell-music pair during a single night, the sleepers started to automatically respond to the tones without the accompanying smells, taking in bigger breaths when the shampoo-associated tone played and smaller breaths when played the sound linked to the rotten fish smell.
This new learned association lingered into the next waking day, too. Even though the sleepers had no idea they had been exposed to smells or sounds, their behavior proved that their brain had actually learned something during sleep. As before, the shampoo sound stimulated a long, deep inhale, while the rotten fish tone caused more shallow breaths.
【小題1】We can infer from the passage that
A.while sleeping, we can learn whatever we want to learn |
B.we will increase the size of inhale if we catch a pleasant smell |
C.the knowledge we learned while sleeping will be forgotten in the next waken day |
D.when walking by a bakery, the fresh bread will cause a nose-jerk reaction |
A.One can’t acquire complicated knowledge during the sleeping hours. |
B.Spanish vocabulary tapes now have a place on the nightstand |
C.Researchers have tried to find evidence that the new words can be learned during sleep. |
D.Complicated information can make its way into the brain during sleep |
A.giving instructions | B.a(chǎn)nalyzing human brains |
C.following the guides of others | D.doing experiments |
A.Culture. | B.Science. | C.History. | D.Economy. |
查看答案和解析>>
科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解
How far would you be willing to go to satisfy your need to know?Far enough to find out your possibility of dying from a terrible disease?These days that’s more than an academic question,as Tracy Smith reports in our Cover Story.
There are now more than a thousand genetic(基因的) tests,for everything from baldness to breast cancer,and the list is growing.Question is,do you really want to know what might eventually kill you?For instance,Nobel Prizewinning scientist James Watson,one of the first people to map their entire genetic makeup,is said to have asked not to be told if he were at a higher risk for Alzheimer’s(老年癡呆癥).
“If I tell you that you have an increased risk of getting a terrible disease,that could weigh on your mind and make you anxious,through which you see the rest of your life as you wait for that disease to hit you.It could really mess you up.” said Dr.Robert Green,a Harvard geneticist.
“Every ache and pain,” Smith suggested,could be understood as “the beginning of the end.”“That’s right.If you ever worried you were at risk for Alzheimer’s disease,then every time you can’t find your car in the parking lot,you think the disease has started.”
Dr.Green has been thinking about this issue for years.He led a study of people who wanted to know if they were at a higher genetic risk for Alzheimer’s.It was thought that people who got bad news would,for lack of a better medical term,freak_out.But Green and his team found that there was “no significant difference” between how people handled good news and possibly the worst news of their lives.In fact,most people think they can handle it.People who ask for the information usually can handle the information,good or bad,said Green.
【小題1】The first paragraph is meant to________.
A.a(chǎn)sk some questions |
B.introduce the topic |
C.satisfy readers’ curiosity |
D.describe an academic fact |
A.He is strongly in favor of the present genetic tests. |
B.He is more likely to suffer from Alzheimer’s disease. |
C.He believes genetic mapping can help cure any disease. |
D.He doesn’t want to know his chance of getting a disease. |
A.a(chǎn)dvisable not to let him know |
B.impossible to hide his disease |
C.better to inform him immediately |
D.necessary to remove his anxiety |
A.break down | B.drop out |
C.leave off | D.turn away |
查看答案和解析>>
科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解
Researchers conducting a study of hospital stays for over two hundred and eighty six thousand older folks found something interesting in their data.
The number of hospitalizations for heart disease and stroke went down significantly among a certain group of people at a certain time of year. What folks, and what time of year, you ask? Flu season and the lucky people were the ones who got flu shots(流感疫苗).
It’s generally recommended that people over fifty get their flu shots every year. Influenza(流行性感冒) is no small thing. it’s responsible for around thirty six thousand deaths a year in the U. S. alone. Getting the shots also cuts down on the chances of getting pneumonia(肺炎), which is especially dangerous in seniors.
But what wasn’t known was that there seems to be an added benefit to getting a flu shots in terms of warding off heart problems. The data,in fact, are quite strong in suggesting this is the case.
In this study, flu shots cut clown the number of hospitalizations for heart disease by nineteen percent. Stroke went down sixteen percent one season and a whopping twenty-three percent a second season.These are big results.
So what's the connection between getting a flu shot and having a stronger heart? It isn’t yet known.
Researchers speculate that the flu virus itself may do damage to blood vessels(血管), possibly making clots(血塊)more likely. Blood clots in the heart can cause heart attacks, and blood clots in the brain can cause strokes.
Whatever the specific details are, there's one more good reason to follow your doctor’ s advice and get that annual flu shot.
【小題1】According to the study, the number of hospitalizations for heart disease and stroke went down significanntly among the ones who _____.
A.got flu shots after they were ill |
B.got flu shots before they were ill |
C.got flu shots at the flu season |
D.got flu shots whenever convenient |
A.it can cut down on the chances of getting pneumonia |
B.it can cut down the number of hospitalizations for heart disease |
C.it can kill the flu virus |
D.if can make blood clots |
A.keeping away | B.dealing with | C.setting off | D. picking up |
A.work out to fight against influenza | B.get flu shot every year |
C.follow our doctor's all advice | D.protect our blood vessels |
查看答案和解析>>
科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解
“The first and best of victories is for a man to conquer himself; to be conquered by himself is, of all things, the most shameful,” says Plato. Selfcontrol is at the root of all the advantages. Let a man give in to his impulses (沖動(dòng)) and feelings, and from that moment he gives up his moral (道德上的) freedom.
A single angry word has lost many a friend. When Socrates found in himself any temper or anger, he would check it by speaking low in order to control himself. If you are conscious of being angry, keep your mouth shut so that you can hold back rising anger. Many a person has dropped dead in great anger. Fits of anger bring fits of disease. “Whom the gods would destroy they firstmake mad” “Keep cool”, says George Herbert, “for fierceness (狂怒) makes error a fault.”
To be angry with a weak man is to prove that you are not strong yourself. “Anger,” says Pythagoras, “brings with folly(愚蠢) and ends with regret.” You must measure the strength of a man by the power of the feelings he conquers, not by the power of those which conquer him.
Selfcontrol is man's last greatest victory.
If a man lacks selfcontrol he seems to lack everything. Without it he can have no patience, no power to govern himself; he can have no selfconfidence, for he will always be controlled by his strongest feeling. If he lacks selfcontrol, the very backbone and nerve of character are lacking also.
【小題1】What does the reader learn from the first paragraph?
A.The greatest victory for a man is to conquer everything except himself. |
B.One's moral freedom is based on the control of himself. |
C.To control oneself is the most difficult in one's life. |
D.If a person is too stubborn, he will feel most shameful. |
A.If the gods want to kill you, they make you crazy first. |
B.If you cannot control yourself, you will become crazy. |
C.If you always lose your temper, you will soon be finished. |
D.If you are mad, you will be punished by the gods. |
A.the very backbone and nerve of character |
B.the patience and power to control himself |
C.selfconfidence |
D.strong feelings |
查看答案和解析>>
百度致信 - 練習(xí)冊(cè)列表 - 試題列表
湖北省互聯(lián)網(wǎng)違法和不良信息舉報(bào)平臺(tái) | 網(wǎng)上有害信息舉報(bào)專區(qū) | 電信詐騙舉報(bào)專區(qū) | 涉歷史虛無(wú)主義有害信息舉報(bào)專區(qū) | 涉企侵權(quán)舉報(bào)專區(qū)
違法和不良信息舉報(bào)電話:027-86699610 舉報(bào)郵箱:58377363@163.com