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


In 2004，the World Health Organization，WHO，warned of a possible outbreak of another serious disease which may be even more deadly than SARS．The WHO believes that it is likely that bird flu will spread to human beings in the next few years．If it does，up to seven millions people could die from the disease．
Diseases like bird flu are caused by viruses，that is，tiny things which change and be come more dangerous over time．When a new type of a common virus changes，it may be able to get past the body’S immune system．If that happens，humans are in great danger until a cure or treatment becomes available．
There have always been viruses and people always get sick，of course，but as we saw with SARS，the situation is more difficult today．People travel more than ever before，which means that disease can spread quickly and across large areas——in fact the whole world．
Scientists are already working on drugs that will prevent or limit the effect of a new virus，but the process takes time．It is just as important to make sure that countries，especially poor countries，are prepared to deal with the disease。New disease usually affect poor areas the most，so we must help develop health care in all countries．
73．The situation is more serious today because          ．
A．people travel more                                      B．people don’t eat health food
C．there aren’t enough hospitals                            D．scientists can’t find a cure
74．From this passage we know          ．
A．bird flu will surely spread to human beings in the next few years．
B．a(chǎn) virus changes and become less dangerous over time．
C．SARS is 1ikely to come again in some years．
D．poor areas usually suffers more from Dew diseases than rich areas．
75．The possible title of this passage is
A．The Work of WHO
B．Scientists Are Working Hard on Drugs for Diseases
C．What Is a Virus
D．Virus Changes and Causes New Diseases Over Time

小題1:A
小題2:D
小題3:D
         
練習冊系列答案
相關(guān)習題

科目：高中英語 來源：不詳 題型：閱讀理解

PEOPLE who have had a painful experience may wish they could wipe the memory from their minds. Researchers at Johns Hopkins University, US, say that this may someday be possible.
A drug remains far off, but researchers have laid a foundation with their discovery that proteins can be removed from the brain’s fear center to cut memories forever.
Previous research had already shown that a special behavior therapy (治療) could cut painful memories. But relapse (復發(fā)) was possible because the memory hadn’t necessarily disappeared.
By looking at that process, Richard Huganir and Roger Clem, two researchers from Johns Hopkins University, discovered a “window of vulnerability (脆弱的窗口)” when proteins are created. The proteins help signals travel within the brain as painful memories are made. Because the proteins are unstable, they can be easily removed with drugs or behavior therapy to cut memories.
Researchers used mice to find the window, but think the process would be the same in humans. They used electric shocks to make the mice fear a certain sound. The sound triggered (觸發(fā)) the creation of the proteins, called calcium-permeable (鈣通透性) AMPARS, which formed for a day or two in the fear centers of the mice’s brains.
The researchers are working on ways to reopen the window by recalling (喚醒) the painful memory and using drugs to remove the protein. They published their report online last month in Science Express.
Their research has drawn interest and concern from experts in mental healthcare.
Kate Farinholt, a mental health expert with the National Alliance on Mental Illness, Maryland, US, said many people suffering from a painful event might benefit from erasing a memory. “Erasing a memory and then everything bad built on that is an amazing idea, and I can see all sorts of potential ,” she said.
But there are a lot of unanswered questions, too.
“Completely deleting a memory is a little scary. How do you remove a memory without removing a part of someone’s life,” Farinholt said. “And is it best to do that, considering that people grow and learn from their experiences?”
小題1:What have researchers at Johns Hopkins University found recently?  
A．A new drug to erase painful memories from human brains.
B．A special behavior therapy to erase painful memories.
C．Removing certain proteins from the brain can wipe painful memories.
D．Erasing memory damages a patient’s brain functions.
小題2:What makes it possible to erase painful memories according to Paragraph 4? 
A．The way the brain cells are created.
B．The unstable character of the proteins in the brain.
C．The strength of the signals the proteins send.
D．The drugs that can stop the formation of memories.
小題3:Which of the following shows the stages of the process done on mice? 
a. removal of fear proteins            b. making mice fear a certain sound
c. fear proteins created in mice brains   d. making mice recall painful memories
A．a(chǎn)-b-c-dB．d-a-c-bC．b-c-d-aD．c-b-d-a
小題4:What is Kate Farinholt’s opinion of the research? 
A．People may lose the chance to learn from their bad experiences.
B．The research will be a great breakthrough in treating painful memories.
C．People could suffer long-term memory loss.
D．People could forget happy memories as well.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


A report, published in last week's Journal of the American Medical Association, offers a picture of how risky it is to get a lift from a teenage driver. Indeed, a 16-year-old driver with three or more passengers is three times as likely to have a fatal(致命)accident as a teenager driving alone. By contrast, the risk of death for drivers between 30 and 59 decreases with each additional passenger.
The author also found that the death rates for teenage drivers increased dramatically after 10 p. m.,and especially after midnight. With passengers in the car,the driver was even more likely to die in a late night accident.
Robert Foss, a scientist at the University of North Carolina Highway Safety Research Center, says the higher death rates for teenage drivers have less to do with "really stupid behavior" than with just a lack of driving experience. "The basic thing, "he says, "is that adults who are responsible for issuing(發(fā)放) licenses fail to recognize how skilled a task driving is. "
Both he and the author of the study believe that the way to reduce the harm is to have so-called graduated licensing systems, in which getting a license is a slower process. A graduated license requires that a teenager first prove himself capable of driving in the presence of an adult, followed by a period of driving at night with a limited number of passengers before graduating to get a full driving license.
Graduated licensing systems have reduced teenage driver crashes, according to recent studies. About half of the states now have some sort of graduated licensing system in place, but only 10 of those states have number limitation on passengers. California is the strictest, with a new driver prohibited from carrying any passenger under 20 for the first six months.
76.Which of the following situations is most dangerous according to the passage?
A. Adults giving a lift to teenagers on the highway after 10 p. m.
B. A teenager driving after midnight with passengers in the car.
C. Adults driving with three or more teenage passengers late at night.
D. A teenager getting a lift from a stranger on the highway at midnight.
77.According to Robert Foss, the high death rate of teenage drivers is mainly due to_______.
A. their frequent driving at night         B. their lack of driving experience
C. their improper way of driving         D. their driving with passengers
78.Which of the following statements is true according to Paragraph 3 ?  
A. Teenagers should spend more time learning to drive.
B. Driving is a skill too difficult for teenagers to learn.
C. Teenagers should be limited in taking driving lessons.
D. People issuing license are partly responsible for the accidents.
79.A suggested measure to be taken to reduce teenagers'driving accidents is that_______
A. driving in the presence of an adult should be made a rule.
B. they should be forbidden to take on passengers
C. they should not be allowed to drive after 10 p. m.
D. the licensing systems should be improved
80.The present situation in about half of the states is that the graduated licensing system_______.
A. is under discussion              B. is about to be set up
C. has been put into effect                 D. has been perfected

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

A Train Floating On Air
A train that floats on air? It's not magic―it's magnets (磁).And it's close to reality.
In Virginia USA the fall of 2002, a train with no wheels traveled on air and carried college students across their campus.In Japan, a whisper-quiet railway engine hovered and raced at 350 miles per hour using magnets and electricity as the power.And in China, a magnet train line linked Shanghai with nearby Pudong Airport.
These trains use magnetic levitation (懸浮) technology, “maglev” for short. They use the same rules as the magnets you pick up at home or school: opposite poles of magnets attract each other, and like poles repel each other.
How does it work?
Powerful magnets on the bottom of the train repel magnets on the track, which is actually just a magnet-filled guiding way. With a magnetic field of sufficient force, the train will go hovering on air, which seemed impossible to us in the past.
When an electrical current is sent through the track, the train moves. Turn the current backwards and the train slows down.
Maglev doesn't rely on the friction (摩擦力) of wheels on track, so it can climb a much steeper hill than a traditional train. And it can travel easily in snow and ice, something that could bring normal trains to a screaming stop.    
小題1:This passage is about __________.
A．maglevB．magnetsC．levitationD．electricity
小題2: Which of the following is a repelling action?
 
A．B．C．D．
小題3:What can we learn from the text?
A．A magnet-filled guiding way is formed inside a maglev train.
B．Instead of electricity, magnets are used as the power of a maglev.
C．Maglev trains can climb hills with the help of magnetwheels.
D．Electric currents decide the movements of a maglev train.
小題4: What is the difference between a maglev train and an ordinary train?
A．A maglev train can climb mountains without power while an ordinary one can’t.
B．A maglev train can travel in college campus while an ordinary train is not allowed.
C．Travelling without a track, a maglev train is safer and smoother than an ordinary one.
D．Floating on a track, a maglev train is faster, quieter than an ordinary railway train.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Beijing — Premier Wen Jiabao has urged the leadership of all countries to deepen their political will in dealing with climate change woes (災難) as uncertainties mount (增長) in the months before the United Nation’s conference in Cancun, Mexico, at the end of this year.
Wen made the remarks on Friday when he met with nearly 20 politicians, climate change and environmental ministers worldwide, who are in Beijing this weekend to attend an international forum on green economy and climate change.
Based on the achievements made at the Copenhagen Summit last December, Wen urged the rich countries to further make clear their compulsory carbon reduction targets. “At the same time, we developing countries should make clear our voluntary goal of slowing down climate change,” Wen said.
Wen also urged the developed countries to transfer（轉(zhuǎn)讓）climate change friendly technologies to the developing countries, especially the poorest countries and island nations.
During the meeting, Wen said China will redouble its efforts in reducing carbon emissions and improving energy efficiency during the coming years after it finishes its 2006-2010 goal of cutting energy consumption per unit of economic output by 20 percent.
While praising China for its green efforts, former Australian Prime Minister Robert J. Lee Hawke asked China to share its experiences and lessons on energy savings and pollution reduction to the rest of the world to deal with global environmental woes and climate change.
Wen responded: “China, together with the rest of the world, is willing to make its due contribution in coping with global warming and climate change.”
At a banquet for the foreign guests on Friday night, former vice-premier Zeng Peiyan said “Increasing uncertainties are ahead for the climate change negotiations. The world needs more dialogue and cooperation”.
“Climate change woes are our shared challenges but the root lies in the historical emissions by the developed countries,” said Zeng, as president of the China Center for International Economic Exchanges, which organized the weekend climate change summit.
Zeng expected the forum to work as a platform for different countries to communicate their positions freely before the Bonn climate change negotiation in June and the Cancun conference at the end of this year.
小題1:Which title suits this passage best?
A．We must work on climate change.
B．We should share our ‘green’ technology.
C．We need to clarify our action targets.
D．We ought to cooperate to control the climate.
小題2: The underlined part in the last paragraph but one implies ________.
A．Air pollution just existed in the developed countries in the past.
B．In the past, the developed countries slowed down the development of the world.
C．Climate change woes were originally caused by the developed countries.
D．The rich countries should be more responsible since they polluted most.
小題3: It can be inferred from the passage that _________.
A．The Chinese government intends to be regarded as a developed country.
B．The whole world has got the same opinion about the measures to take.
C．The developed countries have not found any effective ways to cut their emissions.
D．There is still a long way to go before an agreement can be reached.
小題4:Why did Wen Jiabao urge the developed countries to clarify their carbon reduction targets?
A．Because the developed countries are not willing to deal with global environmental woes.
B．Because the developing countries have not set any goal of slowing down climate change.
C．Because there are mounting uncertainties ahead for the climate change negotiations.
D．Because agreements were already made at the Copenhagen Summit last December.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Weather Report
(8:00 a.m. December 17—8:00 a.m. December 18)
Influenced by a cold front northern Xinjiang, the eastern Qinghai-Tibet Plateau, and the northern and eastern parts of Heilongjiang are expected to experience light snow today. Drizzle (小雨) is forecast for most areas of Sichuan and western coastal areas of South China. Northerly winds of force 4-6 are expected to affect western and southwestern Inner Mongolia, and most parts of Northeast China while northerly winds of force 5-7 will sweep across the Bohai Sea, the northern parts of the Yellow Sea, East China Sea, the Taiwan Straits, and the central and northern parts of the South China Sea.
Weather forecast for major Chinese cities
City
Max(℃)℃C)
Min(℃)
Weather
Beijing
10
－2
clear
Changchun
0
－6
clear
Changsha
19
5
clear
Chengdu
9
4
drizzle
Chongqing
10
5
overcast
Dalian
12
3
clear
Fuzhou
18
－12
cloudy
Guangzhou
23
15
cloudy
Guilin
19
4
clear
Haikou
19
14
overcast
Hangzhou
18
5
clear
Harbin
－3
－8
clear
Hong Kong
21
16
cloudy
Jinan
14
3
-?: ;;.;;:;,.:-,-,;.,
clear
^A-^ ^.-,.-.1
 
小題1:According to the weather report, we know it doesn’t rain in many areas except ______.
A．XinjiangB．Qinghai-TibetC．HeilongjiangD．Chengdu
小題2:From December 17 to December 18, if you go to ______, you may be caught in the snow.
A．Northern Xinjiang and TibetB．Sichuan and South China
C．Inner Mongolia and HeilongjiangD．Qinghai and Sichuan
小題3:On December 17, the East China Sea will be swept by ______.
A．a(chǎn) cold frontB．light snow
C．northerly winds of force 4-6D．northerly winds of force 5-7
小題4:The temperature in Harbin Min(℃) is ___ lower than that in Guangzhou Min(℃).
A．23B．31 C．26D．7

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


Computers Help Fire Fighters
In Kansas City, Missouri, a computer helps fire fighters. The computer contains information about every one of the 35000 street addresses in the city. When fire fighters answer a call, the computer will give them important about the burning building, its position and almost all the ways of helping fire fighters with the problems facing them. For example, it can give medical information about invalids living in a burning building. With this information, the fire fighters can take special care to find these sick persons and carry them away quickly and safely.
The Kansas City computer system also keeps a medical record of each of the city’s 9000 fire fighters. The kind of information is especially useful when a hospital can treat the injured. With this information, doctors at the hospital can treat the injured fire fighters more quickly and easily.
1. Missouri is most likely the name of ___________.
A. a well—known river                   B. the head of the fire fighters
C. a state in the USA                     D. a new kind of computer
2. The computer can give ______________.
A. useful and useless information about the city
B. useful information about everyone living in the city
C. useful information about every street address in the city
D. information about every town around the city
3. In this passage the word “invalid” means a person __________.
A. who is badly injured               B. who is helped by firemen
C. who wants to be a firemen          D. who has become weak through illness or injury
4. If injured, the firemen will ___________.
A. be treated at once with the computer’s help    B. hardly get any treatment
C. ask doctors and nurses for help             D. be taken to hospital by the computer

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


Jan. 7, 2008 --- French President Nicolas Sarkozy would marry his girlfriend, former supermodel Carla Bruni on Feb. 8 or 9, media reported Monday.
The report said that in December --- less than a month after Sarkozy met Bruni --- he gave her a heart-shaped diamond engagement ring.
Carla Bruni, Italian singer, former model and girlfriend of France’s President Nicolas Sarkozy, holds the hand of her son Aurelien while wearing a pink heart-shaped ring during a visit to the ancient Jordanian ruins of Petra Jan. 5, 2008. French newspapers reported that Sarkozy would marry her early in February.
Sarkozy and his wife of 11 years, Cecilia, divorced in October. Their marital（婚姻）problems became well known in May 2005 when she appeared in public at the side of event organizer Richard Attias.
A marriage to Bruni, a one-time star of the catwalks who is now a singer, would be Sarkozy’s third: He divorced his first wife, Marie, in the late 80s --- after he had met and befriended Cecilia.
Political analyst Dominique Moisi said that a Sarkozy proposal to Bruni could be part of his desire to head off any future arguments, and the speed of their visit to the ancient Jordanian ruins of Petra Jan. 5, 2008 would fit with his personality as a busy man in a hurry.
“Apparently, he’s going to marry her, so the problem will be behind him,” Moisi said. “He will increase the opportunities to travel with her, and to say to the French, ‘You see, I must remarry… You need a first lady.’”
Bruni, an Italian-born French citizen, has dated famous men including Mick Jagger and Donald Trump. She has also reportedly been linked to singer Eric Clapton and actor Vincent Perez.
53. What is the correct order of Sarkozy’s marital history?
A. Long marriage to Cecilia                             
B. Visiting ruins with Bruni
C. Getting divorced from Marie                        
D. Giving Bruni a diamond ring
E. To marry the former supermodel
A. c-a-b-d-e           B. e-d-c-a-b           C. c-a-d-b-e           D. a-c-d-b-e
54. What did Moisi really intend to inform the readers?
A. The president will spend more time staying with Bruni
B. Sarkozy is good at balancing state and personal affairs
C. It is not easy for President Sarkozy to seek a new love
D. It is a doubt whether the marriage would have a bright future
55. The possible purpose of the last paragraph is to _________
A. provide some unknown stories about Bruni’s love affairs
B. show uncertainty about the former supermodel’s loyalty
C. imply that past experiences have little effect on a person
D. prove Bruni one of the most popular and attractive females
56. Which would be the best title for the news?
A. Bruni, France’s first lady                   
B. A third marriage to fail
C. France to have first lady                    
D. President’s new girl friend

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Living an Adventurous Life
Nearly ten years ago, I was told that I had a brain tumor （瘤）, and this experience changed my attitude about adventure forever．I thought that I was going to die and that all my adventures were over．I did not have a brain tumor, it turned out, but rather multiple sclerosis （多發(fā)性硬化癥）, which meant that, although they were not over, the nature of my adventures could have to change．
Each morning that I wake up is a fresh event, something that I might not have had．Each gesture that I make carries the weight of uncertainty and demands significant attention: buttoning my shirt, changing a light bulb, walking down stairs．I might not be able to do it this time．If I could not delight in them, they would likely drown me in anger and in self-pity．
I admire the grand adventures of others．I read about them with interest．With Peter Matthiessen I have hiked across the Himalayas to the Crystal Mountain．I have walked with Annie Dillard up, down, into, and across Tinker Creek in all seasons．David Bain has gone with me along 110 miles of Philippine coast, and Ed Abbey has rowed me down the Colorado River．I enjoy the adventures of these courageous figures, who can strike out on difficult trips – 2 miles, 250 miles, 3000 miles – ready to bear cold and tiredness, indeed not just to bear but to celebrate．
But as for me, I can no longer walk very far from the armchair in which I read．Some days I don’t even make it to the backyard．And yet I’m unwilling to give up the adventurous life, the difficulty of it, even the pain, the anxiety and fear, and the sudden brief lift of spirit that makes a hard journey more attractive．
I refine adventure, make it smaller and smaller．And now, whether I am moving on my hands and knees across the dining room to help my cat, lying wide-eyed in the dark battling another period of sadness, gathering flowers from the garden, meeting a friend for lunch, I am always having the adventures that are mine to have．
小題1:Which of the following is TRUE about the author’s reaction after the illness?
A．The author is drowned in anger and self-pity．
B．The author travels to places he/she has dreamed of．
C．The author can’t take care of himself/herself any longer．
D．The author adapts to the condition successfully．
小題2:Why does the author admire the people mentioned in Paragraph 3?
A．Because they write popular novels．B．Because they are great adventurers．
C．Because they are famous geographers．D．Because they fight with hardship in life．
小題3:Which of the following shows the author’s strong love for adventures?
A．The author spends almost every day looking for adventures．
B．The author works hard to make more money for adventures．
C．The author imagines having adventures while reading．
D．The author expects to recover only to continue adventures．

查看答案和解析>>

同步練習冊答案