Dolphins(海豚) live in a dark underwater world. It’s often impossible to see each other or anything else around them, so sound plays an important role in their survival. To communicate with each other, dolphins produce all kinds of sounds.
Only other dolphins understand what the sounds mean. Scientists haven’t uncovered their secret communication, except for one kind of whistle. It might last less than a second, but this whistle is a big deal. Why? Because these whistles are actually names of dolphins - and every dolphin has one. Scientists call these sounds a “signature whistle.” When other dolphins hear the whistle, they know which dolphin is calling.
Dolphins often hunt by themselves but still need to stay connected to the group. Since they can’t always see each other, dolphins use their signature whistles to check in with other dolphins hundreds of yards away. “In coastal areas, dolphins exchange whistles even when they’re a third of a mile apart,” says Greg Campbell, who studies animals. That means dolphins shout out to group members that might be nearly five football fields away.
What’s amazing is who names the baby dolphin. Not the mother. Not an auntie dolphin or another group member. Scientists believe the baby dolphin itself comes up with the signature whistle. Like human babies, a baby dolphin plays with sounds throughout its first year. While testing its sound skills, a baby dolphin is doing something amazing. It’s creating or figuring out its signature whistle. How or why it chooses its signature whistle is not clear. Studies show that most of the time the signature whistle is nothing like its mother’s or group members’ whistles.
When the baby dolphin is about a year old, its signature whistle is set. It repeats it often so the other dolphins learn to recognize it.
Deciphering(破译) dolphin names is just the beginning of figuring out what dolphins communicate about. Do they chat about sharks? Discuss the tides? Maybe they even have a name for people. Someday scientists are to decipher the rest of dolphins’ communication.Sound is important for dolphins because of ______.
| A．their poor sense of direction |
| B．their living environment |
| C．their strong enemies |
| D．their big groups |
The dolphin’s signature whistle ______.
| A．lasts along time |
| B．can travel long distances |
| C．is especially helpful in hunting |
| D．can be recognized by other animals |
The author writes the text mainly to _____.
| A．encourage readers to study dolphins |
| B．tell readers how dolphins communicate |
| C．show how lovely and clever dolphins are |
| D．introduce a special sound made by dolphins |
A baby dolphin gets its name ______.
| A．soon after it was born | B．according to its size |
| C．all by itself | D．with the help of its group |
Dyslexia（失读症）is a learning disorder, it interferes with the ability to recognise words, and for some readers to understand what they have read.
Experts say dyslexia affects about five to ten percent of the population of the United State. Researchers have long known that people with dyslexia write or read words and letters backwards in the wrong order.
But a new study shows that people with dyslexia may have trouble redirecting（重新传入） their attention between senses, from seeing something to hearing something. The study suggests something that might help dyslexic people learn more quickly - play video games.
Vanessa Harrar of Britain's University of Oxford led the study. She reported the findings in the journal Current Biology. The study suggests that dyslexic people may have trouble moving quickly from what they read to what they hear. Doctor Harrar calls this a "sluggish shifting of attention across the senses."
"So, if you are trying to read something and then trying to listen to somebody who's reading aloud and you're trying to follow along with what they are reading -- they have to switch their attention from hearing what they are saying to looking at the piece of paper and back again. So we found they have quite sluggish shifting of attention across the senses," said Harrar.
In the study, Doctor Harrar tested 17 people with dyslexia, and 19 others without reading problems. The volunteers were asked to push a button as quickly as possible when they heard a sound, saw a light or experienced both together. Doctor Harrar compared the speed of their reactions.
She found that people with dyslexia were just as fast as the others when they saw only a picture or heard only a sound. But the dyslexics had a slower reaction time when they heard a sound and saw a picture at the same time.
Doctor Harrar feels like playing action video games could help dyslexic people shift from seeing to hearing more quickly. She adds that images in video games force the eyes to move and focus quickly.
"Video game types of things pop out of here and there, they move your eyes around the screen quite quickly in response to things quite quickly, and the more you play a video game the faster you get that kind of thing. So, the video game is really training the attention system to move quickly," said Harrar.
The study also shows that dyslexic people have the most difficulty going between what they saw and what they heard, this may have an effect on how dyslexic children are taught how to read.
When children learn the alphabet，they usually see the letter first and then hear the sound, or they see and hear the letter at the same time. The study shows that dyslexics might learn more quickly if they hear the sound of a letter or word first before seeing it.What is the main idea of the passage？
| A．Video Games are good for children. |
| B．Study Suggests Video Games Might Help Dyslexics |
| C．A study about Video Games is being carried out. |
| D．Children with Dyslexics can learn better by playing video games. |
People with Dyslexia have the following problems except_________.
| A．writing or reading words and letters backwards in the wrong order. |
| B．redirecting their attention between senses, from seeing something to hearing something. |
| C．moving quickly from what they read to what they hear. |
| D．seeing a picture or hearing a sound. |
What does the underlined word“sluggish”in Paragragh 4 mean？
| A．slow | B．wrong | C．specific | D．accurate |
Why can playing video games help dyslexic people learn more quickly?
| A．While playing video games, people will train their reading and hearing. |
| B．While playing video games, people will have a good knowledge of the system. |
| C．While playing video games, people should move their eyes around the screen quite quickly train the attention system to move quickly. |
| D．Video games can arouse their interest in reading. |
What is the importance of the finding?
| A．The finding will prove video games are not necessarily bad for children. |
| B．People with Dyslexia will be cured by playing video games. |
| C．People with Dyslexia will not be made fun of by others. |
| D．The finding may have an effect on the way to teach dyslexic children how to read. |
Drinking eight cups or two litres of water a day is longstanding advice. But is there any scientific basis for it, asks Dr Chris van Tulleken.
You know those ads that remind us that even a small drop in hydration（水合作用） levels can massively affect performance so you need to keep hydrated with whatever brand of super drink they're selling?
They seem pretty scientific don't they? Man in white coat, athlete with electrodes attached and so on. And it's not a hard sell because drinking feels right - you're hot and sweating so surely replacing that fluid must be beneficial.
Well earlier this year sports scientists in Australia did an extraordinary experiment that had never been done before.This group wanted to find out what happened to performance after dehydration. So they took a group of cyclists and exercised them until they lost 3% of their total body weight in sweat.
Then their performance was assessed after rehydration with either 1) nothing, 2) enough water to bring them back to 2% dehydration or 3) after full rehydration.
So far nothing unusual, but the difference between this and almost every other study that's ever been done on hydration was that the cyclists were blind to how much water they got. The fluid was given intravenously without them knowing the volume.
This is vital because we all, and especially athletes, have such an intimate(密切的)psychological relationship with water consumption.
Remarkably, there was no performance difference between those that were fully rehydrated and those that got nothing. This study was part of a growing movement to "drink to thirst" which hopes to persuade athletes not to over hydrate with the potentially fatal consequence of diluting your sodium level, causing hyponatraemia.
Perhaps the result shouldn't be so surprising. Humans evolved doing intense exercise in extreme heat and dryness. We are able to tolerate losses in water relatively well whereas even slight over hydration can be far more dangerous. In simple terms, being too watery is as bad for you as being too concentrated. What’s the main idea of the passage?
| A．There is no scientific basis for drinking eight cups of water a day |
| B．People used to drink eight cups of water a day |
| C．An experiment about whether people should drink eight cups of water. |
| D．People shouldn’t believe longstanding advice. |
what does the word“dehydration ”in paragragh 4 mean？
| A．doing exercise | B．losing water |
| C．drinking water | D．having a rest |
What is NOT TRUE according to the passage?
| A．Drinking too much water is bad for us |
| B．Sports scientists in Australia did an extraordinary experiment for the first time. |
| C．Those that were fully rehydrated and those that got nothing performed differently. |
| D．The cyclists didn’t know how much water they got. |
What can we learn from the last paragragh?
| A．Humans can bear losing water relatively well |
| B．It’s dangerous to drink water. |
| C．Athletes should drink more water than others. |
| D．This study was part of a growing movement to "drink to thirst". |
what is Dr Chris van Tulleken’s attitude towards the. longstanding advice？
| A．positive | B．doubtful | C．supportive | D．indifferent |
Climate change is making it harder than usual for scientists to figure out what the future will bring and what impact weather changes will have on society and the economy. An upsurge of severe weather events has already destroyed homes, businesses and lives. Some fairly simple changes may reduce the toll.
In a laboratory test, a house built with conventional techniques is falling apart in hurricane-force winds.
The survivor has stronger shingles, thicker roof boards, and metal straps holding floors together.
Wind tunnel tests were done by the Insurance Institute for Business & Home Safety. It says stronger construction costs a little more, but holds up much better to extreme weather.
The growing number of unusually strong storms, like Typhoon Haiyan, has convinced the Chairman of the U. S. Senate Homeland Security Committee, Tom Carper, that extreme weather is the “new norm（标准）.”
"Extreme weather events have increased in frequency over the past 50 years and are expected to become even more common, more intense, and more costly," said Carper.
Hurricane Sandy hit beachfront businesses along the U.S. East Coast, including Carper's home state. Insurance companies had to pay out huge claims. To limit such losses, the insurance industry can raise premiums（保险费） for businesses in vulnerable（易受攻击的）locations and offer discounts to clients who make their buildings more resilient with upgraded construction techniques.
Managing risks is the job of insurance brokers like Kevin Connelly of the Graham Company, who spoke to VOA via Skype.
“We are either going to price your insurance at a huge markup, or we are not going to write (sell it) it at all, which is just as bad obviously," said Connelly.
Drought is another suspected consequence of climate change, and dry ground means more wildfires in California. Current mathematical models of climate change do a poor job of predicting the economic impact of drought and other weather events, says Massachusetts Institute of Technology Professor Robert Pindyck, who spoke via Skype.
“I think all we can do, taking all of that into account, is come up with some very rough numbers, very rough estimates, "said Pindyck. "Consensus estimates that maybe experts provide, that give us a view of what would the catastrophic outcome look like if we don’t do anything?”
To help deal with this serious problem, Pindyck says policymakers should take actions such as imposing a tax on carbon dioxide emissions. A carbon tax would encourage companies and families to use less energy and generate fewer of the gases thought to be driving changes in the climate. But other analysts say it is unlikely a new tax will get approval in the U.S. Congress any time soon. What can be inferred from the passage?
| A．There are many severe weather events destroying homes, businesses and lives. |
| B．Stronger construction will save the expense in the long run. |
| C．Government should be totally responsible for the weather change. |
| D．Typhoon Haiyan hit Tom Carper's home state. |
What natural disasters are not mentioned in the passage?
| A．Drought | B．Hurricanes | C．earthquakes | D．wildfires |
In a laboratory test , what kind of houses can stay up?
| A．a house built with conventional techniques |
| B．A house with stronger shingles |
| C．A house with thinner roof boards |
| D．a house with metal floors . |
What won’t insurance companies do to limit such losses?
| A．pay out huge claims |
| B．raise premiums（保险费） for businesses in vulnerable（易受攻击的）locations |
| C．offer discounts to clients who make their buildings more resilient with upgraded construction techniques. |
| D．price insurance at a huge markup |
What is the attitude of other analysts towards the new tax on carbon dioxide emissions?
| A．supportive | B．doubtful | C．indifferent | D．positive |
Tony Hawken, 57, is divorcing his wife Xiu Li, 51, Britain’s wealthiest woman entrepreneur（企业家）, because he says he doesn’t like being rich and is ‘not in the habit’ of spending lots of money.
The pair traded up their semi-detached home in South Norwood, London, and bought a £1.5million house in Surrey.
Li, who is now worth $1.2billion (£700million) according to Forbes, quickly settled into a life which included sipping a £900 bottle of wine on a luxurious yacht.
However, Mr Hawken says he felt more comfortable getting lunch in his local Wetherspoon’s.
Despite his sudden wealth he continued to buy books from charity shops, and shunned dear clothes.
In an interview withThe Times, he said: ‘I think it made me uncomfortable because I’m not in the habit, I don’t like spending lots of money — I’ve been brought up that way.
‘Until recently I was never a wealthy person. I’ve been moderately comfortable because I have been careful with my money.’
Now the couple have decided to part, Mr Hawken will walk away with just £1million, but says it will be enough for him.
He added: ‘I have got a settlement which is not great, but it’s enough for me because I don’t have an extravagant lifestyle. I won’t have to work if I’m careful.’
On a recent trip to China, Mr Hawken said his wife took him on a yacht and treated him to a £900 bottle of wine, but he prefers his local Wetherspoon pub.
‘I’m getting a little pay when you consider her potential wealth, but I don’t really want to fight it.’
Mr Hawken met Li on a blind date while he was still a teacher and she was studying English.
The couple married, but as Li’s business took off the couple spent more and more time apart. Mr Hawken says the couple have spent most of the relationship apart.
Far from driving them apart, Mr Hawken believes the distance kept them together, and says they would have divorced a long time ago if they were under the same roof.
Mr Hawken says his only regret is not getting a divorce sooner, but he didn’t push for it over fears it would affect the couple’s teenage son William, now 17.
Mr Hawken no longer teaches full-time, but instead gives free tuition to under-privileged children.Tony Hawken is divorcing his wife Xiu Li because________.
| A．he doesn’t affect his son. |
| B．they spent less and less time together. |
| C．he is no longer a teacher. |
| D．he isn’t used to spending a lot of money. |
what does the underlined word “shunned”mean in the fourth paragraph？
| A．enjoy | B．prefer | C．avoid | D．expect |
From the passage， we inferred that ________.
| A．Tony Hawken gave up teaching, because of his sudden wealth. |
| B．Tony Hawken wanted to divorce sooner. |
| C．Tony Hawken lived a rich life. |
| D．Tony Hawken didn’t care about his son. |
From the passage，we know that Xiu Li________.
| A．doesn’t like Mr Hawken. |
| B．is richest woman in China. |
| C．is wealthiest woman entrepreneur in Britain. |
| D．is studying English now. |
which of the following statements is true according to the passage？
| A．Mr Hawken wants to get a lot of money by divorcing |
| B．When Mr Hawken dated Xiu Li，she was an English teacher. |
| C．Mr Hawken believes it was the distance that kept them apart. |
| D．As many passed, Mr Hawken still kept his own lifestyle. |
More than 50 people have responded to an advertise for "one of the most relaxing jobs on the market" - a bathtub TESTER.
Bathstore is seeking a Bathroom Executive Officer (BEO) to test their range of products.
It is sure to give the perfect candidate a stress-free life and possibly some pruned fingers and toes.
And 12 month contract role pays a yearly salary of ￡6,000, plus bathroom installation worth ￡6and products worth ￡4,000 to trial.
For those expecting an easy life, this job isn't all about splashing around in the suds or playing with a rubber duck.
The successful applicant will be responsible for providing written reports and analysis on the overall bathing experience.
However, all that boring stuff can be done from the comfort of your own home.
That's because Bathstore will regularly install their new baths into the BEO's home "ensuring that this is one job that can be taken lying down".
Before you apply, make sure you meet the criteria, which is to be laid back, relaxed and bubbly!
Bathstore's chief marketing officer Claire Bayliss said: "We are dedicated to making dream bathrooms easy, from design to installation, and this appointment demonstrates our commitment to deliver quality products and expert advice.
"We've already received some great applicants for the BEO position and will be looking to produce a short-list in the upcoming weeks.
"We're really looking forward to filling the role and won't rest until we find the right candidate".
Other possible best jobs in the world range from a chief funster to a taste master. what is the advantage of the job for the perfect candicate?
| A．He will lead a stress-free life. |
| B．He can have their fingers and toes washed. |
| C．He can do the job at home. |
| D．He can do the job comfortably. |
How much money will the successful candidate earn per year?
| A．more than￡6,000 | B．no more than￡4,000 |
| C．less than ￡6,000 | D．as much as ￡4,000 |
What should the successful applicant do for the job?
| A．deliver quality products and expert advice. |
| B．write reports and analyse the overall bathing experience. |
| C．install the new baths into their homes. |
| D．advertise the new baths according to their experience. |
What can be inferred from the passage?
| A．The job is not as relaxing as the advertisement says. |
| B．No people have applied for the job. |
| C．The company will have a rest until we find the right candidate |
| D．Claire Bayliss is in charge of designing and installing the bathtub. |
What is true according to Claire Bayliss?
| A．Before you apply, make sure you meet the criteria . |
| B．They have found the right candidate. |
| C．Expert will give them advice on how to design the bathtub. |
| D．They are committed to delivering products of high quality. |