Elephants are famous for their supposedly excellent memory. Now it seems that they are good at simple math too.
Researchers at the University of Tokyo have found an Asian elephant named Ashya can add small quantities together and correctly identify(识别）which is larger.
For example ,when researcher Naoko dropped three apples into one bucket and one apple into a second, then four more apples into the first and five into the second, Ashya correctly identified that the first bucket contained more apples and began munching(嚼）on her tasty prize.
Ashya chose the correct bucket 74% of the time "I even get confused when "I'm dropping the apple," Naoko told New Scientist magazine.
Elephants' counting abilities are far from unique. Chimps, pigeons(鸽子)and dolphins have shown the same abilities in lab tests, but what is more impressive for Elephants is that their ability to tell between two figures does not get worse when those numbers are more similar.
The elephants that Naoko tested were as good at telling the difference between five and six as they were at telling between five and one.
Naoko presented her findings last week at the International Society annual meeting in New York.
It is not obvious why elephants should need this mathematical ability in the wild." It is really tough to figure out why elephants would need to count," said Mya, a professor at Cornell University who studies elephants.
One possibility is that they use it to keep track of other members of their herd(兽群）so that no one is left behind. Asian elephants live in groups of six to eight." You really don't want to lose your group members," said Mya.
Another possibility is that the ability for simple math might be a by-product(副产品）of natural selection for a larger brain.
68.The experiments researchers have done recently show that elephants can____.
A. memorize things correctly B. munch on apples
C. do some simple math D. change small quantities into larger ones
69.What does the underlined word" tough" in Paragraph 8 mean?
A. Difficult B. Impossible C. Easy D. Useful
70.The reason why elephants need to count is possibly that_____.
A. they want to exercise their brains
B .they often count the members of their herd
C. they hope to stay in groups
D. they have taken regular training
Most people know that awkward feeling when you step into an elevator（电梯） with other people and try not to make eye contact.
But new research suggests it may be down to a subconscious（潜意识的）power struggle being played out as you make your way up or down.
A study found that people decide where they stand based on a micro social grading, established within seconds of entering the lift.
Rebekah Rousi, a Ph.D. student in Cognitive Science, conducted a study of elevator behavior in two of the tallest office buildings in Adelaide, Australia.
As part of her research, she took a total of 30 lift rides in the two buildings, and discovered there was an established order to where people tended stand.
In a blog, she writes that more senior men seemed to direct themselves towards the back of the elevator cabins.
She said: 'In front of them were younger men, and in front of them were women of all ages.'
She also noticed there was a difference in where people directed their stare half way through the ride.
Men watched the monitors(监控器), looked in the side mirrors (in one building) to see themselves, and in the door mirrors (of the other building) to also watch others.
'Women would watch the monitors and avoid eye contact with other users (unless in conversation) and the mirrors,' she writes.
The student concluded it could be that people who are shyer stand toward the front, where they can't see other passengers, whereas brave people stand in the back, where they have a view of everyone else.According to Rebekah Rousi, senior men intend to stand ______ of the elevator cabins.
| A．in the front | B．in the middle |
| C．near the side mirrors | D．at the back |
The underlined word “ them ” in paragraph 7 refers to ______.
| A．senior men | B．younger women |
| C．younger men | D．Women |
Why do women choose to stand in the front?
| A．Because they are too shy to make eye contact with others. |
| B．Because they can have a view of everyone else. |
| C．Because they want to show their power. |
| D．Because they want to watch the monitors. |
Carrot juice, because of its many healthy benefits, is commonly called the "magic juice". It has been found that adding carrot juice to people’s diets greatly improves their health. And its delicious taste makes it popular with all members of the family as a beverage(饮料).
Carrot juice is one of the richest sources of vitamin A that can be used in the daily diet. Lack of vitamin A can cause dryness and damage to the skin, nails and hair. Drinking carrot juice to increase the vitamin A in the diet is said to be good for many parts of the body, including the bones and teeth.
Drinking carrot juice is thought to be extremely helpful to the liver (肝脏), because vitamin A helps to clean the liver and reduce fat in it. And it is suggested that drinking carrot juice should be done regularly, rather than just from time to time.
Drinking carrot juice is also thought to improve the eyesight because of the vitamin A in the juice. Lack of vitamin A can lead to night blindness, which can be very dangerous, especially when the person is driving a car. An easy way to find out if you are lacking in vitamin A is to walk from a bright room into a dark room. Your eyes may have some trouble in getting used to the change of light if you are lacking in vitamin A.
How can you make carrot juice? Wash some carrots well in cold water. Scrape (刮) them lightly, but do not peel them, as this will take away valuable vitamins and minerals that lie close to the skin.Lack of vitamin A can lead to _____.
| A．broken bones | B．complete blindness |
| C．skin dryness | D．liver cancer |
According to the passage, carrot juice ______.
| A．does a lot of good to the teeth and other parts of the body |
| B．is popular because it is a magic cure for many diseases |
| C．can wash away the waste from the body |
| D．may be harmful to the body if it’s drunk too much |
We can learn from the fourth paragraph that _____.
| A．you will find it easy to get used to the change of light if you lack vitamin A |
| B．driving cars at night may lead to night blindness |
| C．walking from a bright room into a dark room may lead to night blindness |
| D．drinking carrot juice helps to protect your eyesight |
Which would be the best title for this passage?
| A．Tips on How to Make Carrot Juice |
| B．The Great Benefits of Carrot Juice |
| C．The Way to Keep Good Health |
| D．A Healthy Diet for Patients |
Modern inventions have speeded up people’s lives amazingly. Motor-cars cover a hundred miles in little more than an hour, aircraft cross the world a day, while computers operate at lightning speed. Indeed, this love of speed seems never-ending. Every year motor-cars are produced which go even faster each new computer boasts（吹嘘）of saving precious seconds in handling tasks.
All this saves time, but at a price. When we lose or gain half a day in speeding across the world in an airplane, our bodies tell us so. We get the uncomfortable feeling known as jet-lag; our bodies feel that they have been left behind in another time zone. Again, spending too long at computers results in painful wrists and fingers. Mobile phones also have then danger according to some scientists; too much use may transmit harmful radiation into our brains, a consequence we do not like to think about.
However, what do we do with the time we have saved? Certainly not relax, or so it seems. We are so accustomed to constant activity that we find it difficult to sit and do nothing or even just one thing at a time. Perhaps the days are long gone when we might listen quietly to a story on the radio, letting imaginations take us into another world.
There was a time when some people’s lives were devoted simply to the cultivation of the land or the care of cattle. No multi-tasking there; their lives went on at a much gentler pace, and in a familiar pattern. There is much that we might envy about a way of life like this. Yet before we do so, we must think of the hard tasks our ancestors faced; they farmed with bare hands, often lived close to hunger, and had to fashion tools from wood and stone. Modern machinery has freed people from that primitive existence.The new products become more and more time-saving because ______.
| A．our love on speed seems never-ending |
| B．time is limited |
| C．the prices are increasingly high |
| D．the manufacturers boast a lot |
What is the author’s attitude towards the modern technology?
| A．Critical | B．Objective |
| C．Optimistic | D．Negative |
What does the passage mainly discuss?
| A．The present and past times |
| B．Machinery and human beings |
| C．Imaginations and inventions |
| D．Modern technology and its influence |
In the rush to get to school, you drop a piece of toast on the floor. Do you throw it away or decide it’s still OK to eat? If you’re like most people, you eat it. Maybe you follow the “5-second rule”, which claims foods are safe to eat if you pick them up within 5 seconds after dropping them.
But you might want to think again. Scientists now say that 5 seconds is all it takes for foods to become polluted with enough bacteria to make you sick.
Bacteria can cause many kinds of illnesses. Some kinds of bacteria can grow on food. If you eat foods on which these bacteria are growing, you can become sick.
One of these food-borne bacteria is Salmonella. It makes 1.4 million people sick every year. Salmonella is often found in raw eggs and chicken. Cooking kills these bacteria, which is why it is so important to cook eggs, chicken, and other foods thoroughly.
But how long does it take these bacteria to pollute food? A team of scientists in South Carolina did an experiment. First, they placed an amount of Salmonella on three surfaces; wood, tile (瓦片), and carpet. They placed a piece of bread and a piece of bologna（一种大红肠）on each surface for 5, 30, or 60 seconds. After just 5 seconds, both the bread and the bologna picked up enough bacteria to make you sick.
So, forget the 5-second rule. If your toast drops on the floor, throw it away and get another piece of clean toast. And this time, be careful not to drop it!In which part of a newspaper can you most probably find this passage?
| A．Culture. | B．Health. |
| C．Advertisement. | D．Technology. |
After dropping a piece of toast, a person who follows the “5-second rule” will______.
| A．throw away dirty toast immediately and go away |
| B．pick up the toast as quickly as possible and eat it |
| C．eat the toast within 5 seconds and feel pleased |
| D．get another piece of clean toast quickly and eat it |
The scientists in South Carolina did the experiment to ______.
| A．see how quickly bacteria can pollute food |
| B．show that the 5-second rule is correct |
| C．see how harmful bacteria are to people’s health |
| D．show that bacteria grow at different speeds on different foods |
John Blanchard was studying the crowd making their way through the station. He was looking for the girl whose heart he knew, but whose face he didn’t, the girl with the rose.
When reading a book in a Florida library a year before, John became interested not in the contents of the book, but in the notes penciled in the margin. The handwriting reflected a thoughtful soul and beautiful mind. He discovered the former owner’s name in the front of the book: Miss Hollis Maynell.
He located her address and wrote a letter introducing himself. The next day he was shipped overseas to serve in the army. During the next year, they grew to know each other through the mail and their friendship developed. John requested a photograph, but she refused, saying if he really cared, it wouldn’t matter what she looked like. When the day finally came for him to return home, their first meeting was suggested — 7:00 p.m. at the Grand Central Station in New York.
She wrote, “You’ll recognize me by the red rose I wear on my coat.” So now John was in the station to meet the girl with a rose.
As a pretty and slim girl in green came over, John noticed her blue eyes like flowers in spring. He walked directly towards her, entirely forgetting she was not wearing a rose. As John came closer to her, he saw another woman with a red rose stood nearby. Well past 40, this woman had graying hair done under a worn hat. Seeing the girl in green walk quickly away, John felt as if he were split in two. He desired to follow that girl, but longed for the woman whose spirit had truly companioned and supported him.
The woman looked gentle and sensible. John went to her, saying, “I’m Captain John Blanchard. You must be Miss Maynell. I am glad to meet you here. May I take you to dinner?”
She replied with a smile, “I don’t know what this is about. But the lady in green who just went by, begged me to wear this rose on my coat. She said if you asked me out to dinner, I’d tell you she is waiting for you in the big restaurant across the street. She said it was some kind of test!”What do we know about the woman with a rose?
| A．She was Miss Maynell’s close friend. |
| B．She was a waitress in the big restaurant. |
| C．She was probably a passerby. |
| D．She was paid to meet John at the Station. |
Which would be the best title of the text?
| A．An Interesting Book | B．A Woman With a Rose |
| C．A Brave Soldier | D．A Love Test |
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