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The biggest danger facing airlines nowadays may not be a terrorist with a gun, but the man with portable computer in business class. In the last 16 years, pilots have reported well  over 100 incidents that could have been caused by electromagnetic interference  (电磁干扰).  The source of this interference remains not proved, but increasingly, experts are pointing the  blame at portable electronic devices such as portable computers, radio and cassette players  and mobile telephones.
RTC.A. an organization which advises the aviation  (航空 )industry, has suggested that all  airlines ban such devices from being used during "critical" stages of flight  particularly take-  off and landing. Some experts have gone further, calling for a total ban during all flights .Cur- rently , rules on using these devices are left up to individual airlines. And although some air- lines prevent passengers from using such equipment during take-off and landing, most are un- willing to carry out a total ban, given that many passengers want to work during flight.
The difficulty is predicting how electromagnetic fields might affect an aircraft's computers. Experts know that portable devices send out radiation which affects those wavelengths which aircraft use for navigation and communication. But, because they have not been able to reproduce these effects in a laboratory. they have no way of knowing whether the interference might be. dangerous or not.
The fact that aircraft may be fragile to interference raises the risk that terrorists may use radio systems in order to damage navigation equipment. As worrying, though, is the passenger who can 't hear the instructions to turn off his radio because the music's too loud.
What is said about the over 100 aircraft incidents in the past 16 years?

A.They may have been caused by the damage to-the radio systems.
B.They may have taken place during take-off and landing.
C.They were proved to have been caused by the passengers portable computers.
D.They were suspected to have resulted from electromagnetic interference.

Why is it difficult to predict the possible effects of electromagnetic fields on an airplane 's computers?

A.Because it is extremely dangerous to conduct such research on an airplane.
B.Because it remains a mystery what wavelengths are liable to be interfered with.
C.Because research scientists have not been able to produce the same effects in labs.
D.Because experts lack adequate equipment to do such research.

Few airlines want to perform a total ban on their passengers using electronic devices because_______

A.they don't believe there is such a danger as radio interference
B.the harmful effect of electromagnetic interference is yet to be proved
C.most passengers refused to take a plane ,which bans the use of radio and cassette players
D.they have other effective safety measures to fall back on

The passage is mainly about_________.

A.a new rule for all airlines
B.the disadvantages of electronic devices
C.a possible cause of aircraft incidents
D.effective safety measures for air flight
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You can’t hide a natural disaster from children, so how do we prepare them for it? First of all, you should explain to them that acts of nature aren’t necessarily disasters but can become one. These may include floods, hurricanes, tornadoes, winter storms, wild fires, and earthquakes. The way to prepare children for these disasters is to educate them about what each type is and then make it fun by making them “Disaster Masters” or whatever title you can think of.
Making them a Disaster Master won’t be easy. They must know what’s in a disaster emergency kit(工具箱) and why it’s included. You can get your friends involved, too. If your friends have children, they may want to be involved in your emergency preparations. Make it a group project. This is the opportunity for everyone to become familiar with the equipment.
We have to be aware of our conduct and the way we react to stress. The children will be easily influenced by your attitude and demeanor. The calmness, steady manner, and good humor of your spouse (配偶) and you will go a long way toward the easing or the reduction of stress.
Explain to them what they’re likely to encounter or see and describe how people may react. Disasters can come and go very quickly and generally don’t last long. If you must stay away from home, try to get into a routine quickly and encourage them to make new friends. Let them know they can look to their parents and other adults if they become scared or confused. And it’s important to let them know it’s OK to cry during a disaster.
It’s sometimes helpful to let the children draw pictures of what they’ve experienced. Encourage them to write what they learned and what could have been done better. Save the story. Make it part of a documented family history!
This passage was written mainly to tell us about ______.

A.the importance of mutual help in disaster preparation
B.tips for preparing children for a natural disaster
C.the importance of educating children about natural disasters
D.ways to raise children’s courage in natural disasters

It is a must that a Disaster Master knows ______.

A.when a natural disaster will come
B.why there are natural disasters
C.how to use a disaster emergency kit
D.how to teach others about emergency preparations

The underlined word “demeanor” in Paragraph 3 can be replaced by “______”.

A.personality B.lifestyle
C.emotion D.behavior

When they meet with a natural disaster, children ______.

A.must write down what they see and how they feel
B.should believe that the disaster will never last long
C.can cry if they are frightened
D.should help other children despite the danger

The author wrote the passage mainly for ______.

A.parents B.young children
C.teachers D.college students

Recently a Beijing father sent in a question at an Internet forum (论坛) asking what "PK" meant.
"My family has been watching the 'Super Girl' singing competition TV programme. My little daughter asked me what 'PK' meant, but I had no idea," explained the puzzled father.
To a lot of Chinese young people who have been playing games online, it is impossible not to know this term. In such Internet games, "PK" is short for "Player Kill", in which two players fight until one ends the life of the other.
In the case of the "Super Girl" singing competition, "PK" was used to refer to the stage where two singers have to compete with each other for only one chance to go up in competition ranking.
Like this father, Chinese teachers at high schools have also been finding their students' compositions using Internet jargons which are difficult to understand. A high school teacher from Tianjin asked her students to write compositions with simple language, but they came up with a lot of Internet jargons that she didn't understand.
"My 'GG' came back this summer from college. He told me I've grown up to be a 'PLMM'. I loved to 'FB' with him together; he always took me to the 'KPM'," went one composition.
"GG" means Ge Ge (Chinese pinyin for brother). "PLMM" refers to Piao Liang Mei Mei (beautiful girl). "FB" means Fu Bai (corruption). "KPM" is short for KFC, Pizza Hut and McDonald's.
Some specialists welcome Internet jargons as a new development in language.
If you do not even know what a Kong Long (dinosaur, referring to an ugly looking female) or a Qing Wa (frog, referring to an ugly looking male) is, you will possibly be regarded as a Cai Niao!
By writing the article, the writer tries to ________ .

A.explain some Internet language
B.suggest common Internet language
C.laugh at the Beijing father
D.draw our attention to Internet language

What does the writer think about the term "PK"?

A.Fathers can't possibly know it.
B.The daughter should understand it.
C.Online game players may know it.
D."Super Girl" shouldn't have used it.

The examples of the Beijing father and the Tianjin teacher are used to show that Internet jargons________ .

A.are used not only online
B.can be understood very well
C.are welcomed by all the people
D.cause trouble to our mother tongue

The underlined word "jargons" means " ________ " in Chinese.

A.行话 B.粗口
C.歌词 D.趋势

What would be the best title for the passage?

A.A puzzled father
B.Do you speak Internet-ish?
C.Keep away from Internet-ish
D.Kong Long or Qing Wa?

February has long been a month of romance. With the sweet smell of roses in the air, romantic films hit cinemas and love stories fill newspapers and magazines.
On the 14th day, it is a custom for a boy to take his girlfriend out to dinner, buy her flowers and chocolates, write poems, sing to her or even spell out her name with rose petals! This is what you see on Valentine’s Day, a day named after Valentine who was a priest in the third century Rome. When the emperor (皇帝) decided that single men could become better soldiers than those with wives, he didn’t allow marriage.
But Valentine continued to perform marriage ceremonies for young lovers in secret. When his actions were discovered, the emperor sentenced him to death. While in prison, it is said that Valentine fell in love with the daughter of his prison guard. Before his death, he wrote her a letter, which he signed “From your Valentine”, an expression that is still in use today. Valentine died for what he believed in and so he was made a Saint (圣徒), as well as becoming one of history’s most romantic characters.
Nowadays, Valentine’s Day is also popular among Chinese young people. Some students are planning to make Valentine’s cards for parents, teachers and friends. Others want to hold parties at which they will exchange small gifts and eat heart-shaped cakes. The idea is to have fun and encourage people to share in the spirit of St. Valentine.
Why did the emperor in Rome not allow marriage in his country?

A.Because there were few women in his country at that time.
B.Because he thought men without wives could be better soldiers.
C.Because there wasn’t enough food for so many people.
D.Because he wanted to control the birth rate.

Valentine was put into prison because ______.

A.he killed one of the soldiers
B.he stole a lot of food
C.he didn’t obey the emperor’s order
D.he didn’t want to be a soldier

The last paragraph mainly tells us ______.

A.students in China send cards to their teachers
B.it is a good idea to celebrate Valentine’s Day in China
C.it is interesting to celebrate Valentine’s Day in China
D.Valentine’s Day is also popular in China now

People celebrate Valentine’s Day to _________.

A.get gifts B.honor a priest
C.enjoy romance D.get married

The best title for this passage should be ______.

A.Valentine’s Day B.A Brave Priest
C.Valentine’s Day in China D.A Romantic Man

Why do we laugh and get amusement from so many different things,from puns (双关语) to pratfalls? Why are some things funny to some people and not to others? How is that while a successful joke can cause pleasure,a sick one can cause serious harm?
Over the centuries,various scholars have attempted to produce a universally agreed-upon theory of humor.Plato and Aristotle introduced the superiority(优越感) theory,the idea that people laugh at the misfortune of others.Their theory seems to explain teasing,but it doesn’t work well for knock-knock jokes.Sigmund Freud argued for his relief theory,the concept that humor is a way for people to release psychological tension and reveal their inner fears and desires.His theory works well for dirty jokes,less well for most puns.
The majority of humor expels today agree with the incongruity theory,the idea that humor arises when there’s a gap between what people expect to happen and what actually happens.Incongruity has a lot going for it — jokes with unexpected funny lines,for example,fit well.But scientists have found that in comedy,unexpectedness is overvalued.
With the goal of developing a new,more satisfactory explanation,I produced “the gentle violation(违背)theory”,the idea that humor arises when something seems wrong or threatening,but is actually OK or safe.A dirty joke,for example,trades on moral or social violations,but it’s only going to get a laugh if the person listening is open enough to consider the subject OK to talk about.Similarly,puns can be seen as linguistic violations that still make grammatical sense.
And while most humor theories have struggled to account for tickling (挠痒痒),or just avoided the phenomenon altogether,my theory accounts for even this kind of laughter.Tickling involves violating someone’s physical space in a gentle way.People can’t tickle themselves — because it isn’t a violation.
What is the author’s attitude towards Plato and Aristotle’s theory?

A.Critical. B.Approving C.uncaring D.Unclear

According to Sigmund Freud’s theory,we can infer that __________ .

A.people will laugh when they see others suffer
B.telling dirty jokes is a relief of one’s nervous feelings ’
C.unexpectedness can explain how humor works
D.tickling doesn’t involve psychological tension

According to the author,why are some things funny to some people but not to others?

A.Because the sense of humor varies greatly from person to person.
B.Because people have different expectations for the same thing.
C.Because some people lack the sense of safety deep in their heart.
D.Because people’s understanding of violation is different.

What is the author’s main purpose of writing this passage?

A.To draw people’s attention to the research of humor.
B.To criticize people’s misconceptions about humor.
C.To explain what exactly causes people to laugh.
D.To prove the sense of humor can be developed.

Coffee is a powerful beverage.On a personal level,it helps keep US awake and active.On a much broader level,it has helped shape our history and continues to shape our culture.
Coffee didn’t take off until the l400s when people figured out they could roast its seeds.By the l500s,the drink had spread to coffeehouses across the Arab world.Within another l50 years,it took Europe by storm.
“It actually had a major impact on the rise of business,” historian Mark Pendergrast says.Coffeehouses became a spot not just to enjoy a cup but to exchange ideas.The insurer Lloyd’s of London was founded hundreds of years ago in one of London’s 2,000 coffeehouses.Literature,newspapers and even the works of great composers like Bach and Beethoven were also spawned(涌现)in coffeehouses.
It is often said that after the Boston Tea Party of l773,when American colonists attacked British tea ships and threw boxes of tea into the harbor,Americans universally switched over to drinking coffee.In a letter John Adams wrote to his wife,Abigail,the Founding Father claims his love of tea but says he will have to learn to embrace coffee instead,because drinking tea had become a symbol of not loving the country.
For all the upsides coffee has brought the modern world,it also led to its fair share of downsides,too.Europeans carried coffee with them as they colonized various parts of the world,and this frequently meant they enslaved people in order to grow it.In Brazil — where slavery was legal until l888 — coffee plantations would use slash-and-burn agriculture,tearing down rain forests and planting coffee trees.Once the soil had been exhausted,growers would move on to another place.
And yet,coffee,as Pendergrast says,”had a very good impact in many ways on our civilization,even though it was,for a long time,grown by slaves.”
Why did people enjoy going to coffeehouses?

A.Because it was a fashion to drink coffee.
B.Because coffeehouses provided a better flavor.
C.Because they could stay awake and active there.
D.Because they could exchange ideas there.

What can we learn from the fourth paragraph?

A.American colonists made great profits by trading in coffee.
B.Tea was regarded as a symbol of loving one’s country.
C.Coffee became very popular after the incident in Boston.
D.John Adams was the Founding Father of the Tea Party.

In the fifth paragraph.the writer points out that __________ .

A.Coffee plantation was closely connected with slavery
B.coffee plantation led to outdated agriculture in Brazil
C.slavery in Brazil had been against the law until l888
D.slavery was responsible for the damage to rainforests

What is mainly talked about in this passage?

A.Some interesting stories about coffee culture.
B.Important Roles that coffee played in history.
C.How coffee became the most popular beverage.
D.How coffee affected America’s independence.

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