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 |
Harvard University named historian Drew Gilpin Faust as its first female president on Sunday, ending a lengthy and secretive search to find a successor（接任者）to Lawrence Summers .
The seven-member Harvard Corporation elected Faust, a noted scholar on History of the American South and dean of Harvard’s Radcliffe Institute for Advanced Study, as the university’s 28th president.
“This is a great day, and a historic day for Harvard,” James R. Houghton, chairman of the presidential search committee, said in a statement. “Drew Faust is an inspiring and accomplished leader, a superb scholar, a dedicated teacher, and a wonderful human being.”
Her selection is noteworthy given the heated debates over Summers’ comments that genetic differences between the sexes might help explain the lack of women in top science jobs.
Faust has been dean of Radcliffe since 2001, two years after the former women’s college was combined into the university as a research center with a mission to study gender issues.
Some professors have quietly groused that the 371-year-old university is appointing a fifth president who is not a scientist. No scientist has had the top job since James Bryant Conant retired in 1953; its last four have come from the fields of classics, law, literature and economics.
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Faust is the first Harvard president who did not receive a degree from the university since Charles Chauncy, a graduate of Cambridge University, who died in office in 1762. She attended the University of Pennsylvania.
“Teaching staff turned to her constantly,” said Sheldon Hackney, a former president of the University of Pennsylvania and historian who worked closely with Faust. “She’s very clear. She has a sense of humor, but she’s very strong-minded. You come to trust in her because she’s so solid.”| A．Harvard named its 1st female president. |
| B．History of Harvard University changed. |
| C．Debates on female equality ended |
| D．Drew Gilpin Faust, a famous woman historian. |
Which is NOT true about Drew Gilpin Faust?
| A．She is the 28th president of Harvard University. |
| B．She is a famous scholar from the American South. |
| C．She isn’t a graduate from Harvard University |
| D．She was head of Radcliffe Institute for Advanced Study. |
Lawrence Summers held the view that .
| A．women cannot achieve as much as men in management |
| B．women cannot hold important positions in society |
| C．women can match men in science jobs |
| D．few women make top scientists owing to genes |
The underlined word “groused” in the 6th paragraph means .
| A．approved | B．commented | C．complained | D．indicated |
This passage probably appears in a .
| A．biography | B．personal letter | C．research paper | D．newspaper report |
Since the 1970s, scientists have been searching for ways to link the brain with computers. Brain-computer interface(BCI) technology could help people with disabilities send commands to machines.
Recently, two researchers, Jose Millan and Michele Tavella from the Federal Polytechnic school in Lausanne, Switzerland, demonstrated（展示）a small robotic wheelchair directed by a person’s thoughts.
In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand. He could even talk as he watched the vehicle and guided it with his thoughts.
“our brain has billions of nerve ceils. These send signals through the spinal cord（脊髓）to the muscles to give us the ability to move. But spinal cord injuries or other conditions can prevent these weak electrical signals from reaching the muscles,” Tavella says. “Our system allows disabled people to communicate with external world and also to control devices.”
The researchers designed a special cap for the user. This head cover picks up the signals from the scalp(头皮) and sends them to a computer. The computer interprets the signals and commands the motorized wheelchair. The wheelchair also has two cameras that identify objects in its path. They help the computer react to commands from the brain.
Prof. Millan, the team leader, says scientists keep improving the computer software that interprets brain signals and turns them into simple commands. “The practical possibilities that BCI technology offers to disabled people can be grouped in two categories: communication, and controlling devices. One example is this wheelchair.”
He says his team has set two goals. One is testing with real patients, so as to prove that this is a technology they can benefit from. And the other is to make sure that they can use the technology over long periods of time.BCI is a technology that can______.
| A．help to update computer systems | B．link the human brain with computers |
| C．help the disabled to recover | D．control a person's thoughts |
How did Tavella operate the wheelchair in the laboratory?
| A．By controlling his muscles. | B．By talking to the machine |
| C．By moving his hand. | D．By using his mind. |
Which of the following shows the path of the signals described in Paragraph 5?
| A．scalp→computer→cap→wheelchair | B．computer→cap→scalp→wheelchair |
| C．scalp→cap→computer→wheelchair | D．cap→computer→scalp→wheelchair |
The team will test with real patients to _____ .
| A．make profits from them | B．prove the technology useful to them |
| C．make them live longer | D．learn about their physical condition |
Which of the following would be the best title for the text?
| A．Switzerland, the BCI Research Center |
| B．New Findings About How the Human Brain Works |
| C．BCI Could Mean More Freedom for the Disabled |
| D．Robotic Vehicles Could Help to Cure Brain Injuries |
Few people ever took notice of Mr. Jimmy Tan whenever he entered a room. He was a shy, quiet and simple man who preferred to keep to himself in public. On the other hand, Mr. Thomas Kim, a fellow scientist, was a man everyone would notice on the streets. He wore bright outfits with huge flower prints, spoke with a booming voice, and his laughter could be heard from all corners of a room. In addition to the differences in their characters, Mr. Kim and Mr. Tan were also great rivals at work in the Institute of Future Science.
On Christmas Eve, everyone left work early to celebrate the special occasion, except for Mr. Tan and Mr. Kim. They were in their laboratory analyzing the results of their latest experiments. Mr. Tan realized that something special was taking place in his experiment —the bacteria he had cultured were growing extremely quickly under high pressure and at a very low temperature. After noting down the findings in his notebook, he left the room to prepare for another round of tests. Shortly after, Mr. Kim entered.
“Hey Jimmy,” Mr. Kim called out, “do you have an extra copy of the laboratory booking form?”
There was no reply, so Mr. Kim looked through Mr. Tan’s things. He soon found Mr. Tan's notebook and was horrified to see that Mr. Tan had managed to make one of the most important discoveries in modern science. He then looked into the deep-freeze cupboard where a dish containing the bacteria was kept. He put them into his pocket and returned to his own laboratory.
Mr. Tan came back an hour later to find his notebook and the dish missing. He knew that Mr. Kim had taken them and went to Mr. Kim's laboratory to find out. When he opened the door, he found Mr. Kim lying on the floor motionless. His face was pale and his skin had turned black. The deadly bacteria had been handled improperly. He shook his head and left.From the first paragraph we know Mr. Kim was a quiteperson.
| A．famous | B．hardworking |
| C．wealthy | D．outgoing |
The underlined word "rivals" in the first paragraph is closest in meaning to.
| A．enemies | B．colleagues |
| C．competitors | D．friends |
What does the underlined word “them” refer to in the 4th paragraph?
| A．the most important discoveries |
| B．the notebook and the dish |
| C．the cupboard and the bacteria |
| D．the dish and the bacteria |
Which of the following is true according to the passage?
| A．Mr. Kim was afraid Mr. Tan might succeed ahead of him. |
| B．Mr. Tan's bacteria grew very fast in a warm container. |
| C．Mr. Tan worked much harder than Mr. Kim. |
| D．Mr. Kim was so tired that he fell down into sleep. |
What happened to Mr. Kim in the end?
| A．He died on Christmas Eve. |
| B．He was arrested by the police. |
| C．He shared the success with Mr. Tan. |
| D．He succeeded ahead of Mr. Tan. |
The speed and convenience of modern travel means that destinations that used to take a long time to travel to can now be reached quickly and easily. Even though” faraway” countries may now seem closer thanks to air travel, they may still be different from your home country.Following are some fundamental rules that will make communication easier, and your trip more enjoyable.
If you don not know the word for something in local language, or can not make yourself understood verbally, try drawing a picture, or pointing to an object.
Avoid topics of conversation that you think may be sensitive..Feel free to show interest in the history and customs of the place you are visiting, but don’t ask too many questions about why things are done a certain way; you may offend the local people.
Kissing on the street or in public places is unacceptable behavior and should be avoided. If you are unsure of how to behave, watch the local people and copy them---if they don’t behave in a certain way, you probably shouldn’t either.
Finally, if you are traveling on business, or plan to stay with a host to family, and you wish to take a gift, do some research. . One of the easiest ways to offend somebody is to give the wrong gift.
Wherever you go in the world, always be tolerant of the local customs. Avoid being critical; try instead to show respect for the values of the country you are in, even if you do not necessarily agree with them
| A．Keep in mind that in many cultures, display affection in public is considered taboo. |
| B．Consider the main lifestyle of the country you plan to visit. |
| C．Never raise your voice in order to make yourself understood. |
| D．If a topic is sensitive in your own culture, it will more than likely be the same in other cultures. |
E．The idea of the perfect gift varies greatly from country to country.
F．The opening of gifts is also treated very differently around the world.
G．Therefore, it is important to adapt your behavior not to offend the local people.
I had an experience some years ago, which taught me something about the ways in which people make a bad situation worse by themselves. One January, I had to hold two funerals on successive days for two elderly women in my community. Both had died “full of years”, as the Bible would say .Their homes happened to be near each other, so I paid condolence(吊唁)calls on the two families on the same afternoon.
At the first home, the son of the deceased woman said to me, ”If only I had sent my mother to Florida and gotten her out of this cold and snow, she would be alive today. It’s my fault that she died. ”At the second home, the son of the other deceased woman said, “If only I hadn’t insisted on my mother’s going to Florida, she would be alive today .That long airplane ride, the sudden change of climate ,was more than she could take．It’s my fault that she’s dead.”
You see that any time there is a death, the survivors will feel guilty. Because the course of action they took turned out bad, they believe that the opposite course------keeping mother at home, putting off the operation----would have turned out better. After all, how could it have turned out any worse?
There seem to be two elements involved in our willingness to feel guilty. The first is our pressing need to believe that the world makes sense, that there is a cause for every effect and a reason for everything that happens. That leads us to find patterns and connections both where they really exist and where they exist only in our minds.
The second element is the view that we are the cause of what happens, especially the bad things that happen. It seems to be a short step from believing that every event has a cause to believing that every disaster is our fault. The roots of this feeling may lie in our childhood.
A baby comes to think that the world exists to meet his needｓ,and that he makes everything happen in it. He wakes up in the morning and summons the rest of the world to his tasks. He cries, and someone comes to attend to him. When he is hungry, people feed him，and when he is wet, people change him. Very often, we don not completely outgrow that childish view that our wishes cause things to happen.The author had to conduct the two women’s funerals probably because_______.
| A．he was minister of the local church |
| B．he wanted to comfort the two families |
| C．he was an official of the community |
| D．he had great pity for the deceased |
People feel guilty for the death of their loved ones because________.
| A．they can’t find a better way of express their sorrow |
| B．they have neglected the natural course of events |
| C．they believe that they were the reason |
| D．the don’t know things often turn in the opposite direction |
According to the main passage, the underlined part in Paragraph 4 probably means that________.
| A．everything in the world is predetermined |
| B．there’s an explanation for everything in the world |
| C．the world can be interpreted in different ways |
| D．we have to be sensible in order to understand the world |
What’s the main idea of the message?
A .Life and death is an unsolved mystery.
B. Never feel guilty all the time because not every disaster is our fault.
C Every story should have a happy ending.
D. In general, the survivors will feel guilty about the people who passed away.