Caffeine not only gives us a daily jump start, but new research suggests it also can strengthen long-term memory.
According to the US Food and Drug Administration, nearly 90 percent of people worldwide consume about 200 milligrams of caffeine each day. That' s equivalent to about one strong cup of coffee a day. Writing in " Nature Neuroscience" , Johns Hopkins University researchers say their findings show that caffeine strengthens certain memories for up to 24 hours after being taken in.
" We've always known that caffeine has cognitive-enhancing effects (促智效果) , but its particular effects on strengthening memories and making them resistant to forgetting has never been examined in detail in humans, " said senior author of the paper Michael Yassa. " We re- port for the first time a specific effect of caffeine on reducing forgetting over 24 hours. " Conducting a double-blind trial, the researchers worked with a test group of people who didn't regularly consume caffeinated products. Five minutes after studying a series of images, the test subjects were given either a placebo(无效对照剂) or a 200-milligram caffeine tablet.
To check the caffeine levels of their test subjects, the research team took saliva samples (唾液样品) from them before they took their tablets and again one, three and 24 hours afterwards.
Both groups of test participants ( those who took the placebo and those who took the caffeine tablet) were tested the following day to see if they could recognize the images they' d seen the previous day.
The test included showing the test subjects another series of images that included some new images , those that were shown the previous day, as well as other images that were similar, but not the same as those they had viewed earlier.
The researchers found that more members of the group who were given the caffeine tablets were able to correctly identify some of the new images as " similar" to previously viewed images rather than incorrectly identifying them as the same.
"We also know that caffeine is associated with health and longevity(长寿) and may have some protective effects from cognitive decline like Alzheimer' s disease (阿尔茨海默症). " said Yassa.
The purpose of the new research is ____________.
| A．to examine caffeine ' s memory-strengthening effects in detail |
| B．to write the paper " Nature Neuroscience" |
| C．to prove caffeine has cognitive-enhancing effects |
| D．to survey how much caffeine people consume a day |
During the research , the researchers did the following things EXCEPT ________.
| A．giving the test subjects placebos or caffeine tablets |
| B．checking the caffeine levels of the test subjects |
| C．showing the test subjects series of images |
| D．encouraging the test subjects to drink more coffee |
How did the test subjects show the caffeine ' s memory-strengthening effects?
| A．By taking the caffeine tablets instead of placebos. |
| B．By recognizing images they ' d seen the previous day. |
| C．By identifying the new images as the same. |
| D．By telling the differences between new images. |
What will the next part of the text possibly talk about?
| A．Ways to achieve health and longevity. |
| B．The harmful effects of cognitive decline. |
| C．The treatment for Alzheimer' s disease. |
| D．The effects caffeine has on health. |
The only survivor of one of the two Sandy Hook Elementary School first-grade classrooms where Adam Lanza shot and killed 20 children tricked the gunman by playing dead, the girl’s pastor (牧师) said.
“She ran out of the school building covered from head to toe with blood and the first thing she said to her mom was, “Mommy, I’m OK but all my friends are dead” Pastor Jim Solomon told ABC News’ Lara Spencer this weekend.
“Somehow, at that moment, by God’s grace, she was able to act as she was already dead.” he said.
The girl, a 6-year-old whose name is not being announced for privacy (隐私) reasons, was the first student to appear from the lockdown (封锁) at Sandy Hook, Solomon said. He said the young girl described the shooter to her mom in a way that only a young child can.
“Well, she saw someone who she felt was angry and someone she felt was very mad,” Solomon said. “I think it’s impossible without the help of God. She has wisdom beyond her years, for sure’’.
Of the 20 children killed on Friday, eight were boys and l2 were girls. Six staff members, all female, were also killed. The gunman, whose mother was also killed by him before he went to the schoo1 classrooms, was found dead at the present spot.
“The mom told me — and I thought this was very insightful (有深刻见解的) — that she was suffering from what she felt was survivor’s guilt because so many of her friends no longer have their children but she has hers,” Solomon said how the girl’s mother and father are handling the trauma (伤害)．“I don’t know whether I would have the type of faith that they have if the same thing happened to me.”How did the girl manage to avoid being shot?
| A．She persuaded the shooter into not shooting her. |
| B．She hid herself under the desk. |
| C．She rushed out of the school building in time. |
| D．She pretended to be dead. |
The killing case which happened in Sandy Hook Elementary School.
| A．ended up with the shooter being killed |
| B．was a shooting by a group of people |
| C．was due to the gunman getting angry with the pupils |
| D．was not open to the public for the moment |
Which of the following is TRUE about the girl’s mom?
| A．She was disappointed with the pastor. |
| B．She felt very dissatisfied with other parents. |
| C．She felt terribly sorry for those who had lost their children. |
| D．She strongly complained the police. |
When there are some strangers in front of us, which of them will we trust?
According to a new study in the online PLOS One, people make their decisions to trust others largely based on their faces. Your appearance can do a lot for you, especially if you are in the financial industry. The more trustworthy you look, the more likely people will buy what you’re selling.
Researchers from Britain’s University of Warwick Business School, University College London, and Dartmouth College, US, did a number of experiments.
The research team used computer software to make 40 faces, from the least to the most trustworthy-looking.
The study said that the difference between a trustworthy face and one that isn’t as trustworthy comes from features that look slightly angry or slightly happy, even when the face is at rest. However, a slightly happy face is more likely to be trusted.
Researchers gave participants some money and asked them which face they trusted to invest the money for them. Then researchers gave some good and bad information about the people with these faces, and asked the participants again whom they trusted.
The results showed that even if they got different information, the participants didn’t change their choices. They were still more likely to invest their money with the more trustworthy-looking faces.
Chris Olivola, one of the study’s authors, said in the University of Warwick’s press release: “It seems we are still willing to go with our own instincts about whether we think someone looks like we can trust them. The temptation to judge strangers by their faces is hard to resist.” Which of the following can be a proper title for this passage?
| A．What kind of face do you trust? |
| B．Who did the experiments? |
| C．Why do you trust him or her? |
| D．Why did they do the experiments? |
According to the study, which of the following faces is most likely to be trusted?
| A．A sad face. | B．A smiling face. |
| C．A crying face. | D．An angry face. |
Which of the following about the experiment is TRUE?
| A．The trustworthy faces were given good information. |
| B．Researchers took photos of the 40 people’s faces in college. |
| C．Most participants gave their money to the trustworthy-looking faces. |
| D．Participants liked to choose the faces with good information. |
What did the researchers learn from their experiment?
| A．People can’t refuse temptations. |
| B．People always do things with their instincts. |
| C．People don’t trust strangers with sad faces. |
| D．People often judge strangers by their faces. |
Happiness through Honorable Actions
Do you want to live with a strong sense of peacefulness, happiness, goodness, and self-respect? The collection of happiness actions broadly categorized as “honor” help you create this life of good feelings.
Here is an example to show how honorable actions create happiness.
Say a store clerk fails to charge us for an item. If we keep silent, and profit from the clerk’s mistake, we would drive home with a sense of mean excitement. Later we might tell our family or friends about our good fortune. On the other hand, if we tell the clerk about the uncharged item, the clerk would be grateful and thank us for our honesty. We would leave the store with a quiet sense of honor that we might never share with another soul.
Then, what is it to do with our sense of happiness?
In the first case, where we don’t tell the clerk, a couple of things would happen. Deep down inside we would know ourselves as a type of thief. In the process, we would lose some peace of mind and self-respect. We would also demonstrate(证明) that we cannot be trusted, since we advertise our dishonor by telling our family and friends. We damage our own reputations(名誉) by telling others. On the contrary, bringing the error to the clerk’s attention causes different things to happen. Immediately the clerk knows us to be honorable. Upon leaving the store, we feel honorable and our self-respect is increased. Whenever we take honorable action we gain the deep internal rewards of goodness and a sense of nobility.
There is a beautiful positive cycle that is created by living a life of honorable actions. Honorable thoughts lead to honorable actions. Honorable actions lead us to a happier existence. And it’s easy to think and act honorably again when we’re happy. While the positive cycle can be difficult to start, once it’s started, it’s easy to continue. Keeping on doing good deeds brings us peace of mind, which is important for our happiness.According to the passage, the honorable action in the example brings us our ______.
| A．self-respect | B．Financial(经济的) rewards |
| C．advertising ability | D．friendly relationship |
The author thinks that keeping silent about the uncharged item is equal to ______.
| A．lying | B．stealing | C．cheating | D．advertising |
The underlined phrase “bringing the error to the clerk’s attention” means ______.
| A．offering advice to the clerk | B．telling the truth to the clerk |
| C．asking the clerk to be more attentive | D．reminding the clerk of the charged item |
How does the positive cycle work according to the author?
Societies all over the world name places in similar ways. Quite often there is no official naming ceremony(仪式) but places tend to be called names as points of reference by people. Then an organized body steps in and gives the place a name. Frequently it happens that a place has two names: one is named by the people and the other by the government. As in many areas, old habits die hard, and the place continues to be called by its unofficial name long after the meaning is lost.
Many roads and places in Singapore (新加坡) are named in order that the pioneers will be remembered by future generations. Thus we have names such as Stamford Road(斯坦福路) and Raffles Place. This is in keeping with traditions in many countries--in both the West and the East.
Another way of naming places is naming them after other places. Perhaps they were named to promote friendships between the two places or it could be that the people who used to live there were originally from the places that the roads were named after. The mystery is clearer when we see some of the roads named in former British bases. If you step into Selector Airbase you will see Piccadilly Circus--obviously named by some homesick Royal Air Force personnel.
Some places were named after the activities that used to go on at those places. Bras Basah Road is an interesting example. “Bras Basah” means “wet rice” in Malay (马来语). Now why would anyone want to name a road “Wet Rice Road”? The reason is simple. During the pioneering days, wet rice was laid out to dry along this road.
A few roads in Singapore are named by their shapes. There is “Circular Road” for one. Other roads may have part of their names to describe their shapes, like “Paya Lebar Crescent”. This road is called a crescent (月牙) because it begins on the main road, makes a crescent and comes back to join the main road again.We learn from Paragraph 1 that ________.
| A．the government is usually the first to name a place |
| B．a ceremony will be held when a place is named |
| C．many places tend to have more than one name |
| D．people prefer the place names given by the government |
What does the underlined phrase “die hard” in Paragraph 1 probably mean?
| A．Change suddenly. |
| B．Change significantly. |
| C．Disappear very slowly. |
| D．Disappear mysteriously. |
Which of the following places is named after a person?
| A．Selector Airbase. |
| B．Raffles Place. |
| C．Piccadilly Circus. |
| D．Paya Lebar Crescent. |
What can be inferred from the passage?
| A．Young Singaporeans have forgotten the pioneers. |
| B．Some places in Singapore are named for military(军事) purposes. |
| C．The way Singaporeans name their places is unique. |
| D．Some place names in Singapore are the same as in Britain. |
Why is pink or purple a color for girls and blue or brown for boys?
The answer depends largely on cultural values as well as personal experiences. To the Egyptians, green was a color that represented the hope and joy of spring. While for Muslims, it means heaven. Red is a symbol of good luck in many cultures. In China, children are given money in a red envelope to bring good fortune in the New Year. For many nations, blue is a symbol of protection and religious beliefs. Greek people often wear a blue necklace hoping to protect themselves against evils(灾祸).
People’s choice of colors is also influenced by their bodies’ reactions(反应) toward them. Green is said to be the most restful color. It has the ability to reduce pain and relax people both mentally and physically. People who work in green environment have been found to have fewer stomach aches.
Red can cause a person’s blood pressure to rise and increase people’s appetites(食欲). Many decorators will include different shades of red in the restaurant. Similarly, many commercial websites will have a red “Buy Now” button because red is a color that easily catches a person’s eye.
Blue is another calming color. Unlike red, blue can cause people to lose appetite. So if you want to eat less, some suggest that eating from blue plates can help.
The next time you are deciding on what to wear or what color to decorate your room, think about the color carefully.Muslims regard green as a symbol of heaven mainly because of their _______.
| A．cultural values |
| B．commercial purposes |
| C．personal experiences |
| D．physical reactions to the color |
Why will many commercial websites have a red “Buy Now” button?
| A．To relax people physically. |
| B．To increase people’s appetites. |
| C．To encourage people to make a purchase(购买). |
| D．To cause a person’s blood pressure to rise. |
What color might help lose weight according to the text?
| A．Red | B．Green. | C．Blue. | D．Purple. |
Which of the following would be the most proper title for the text?
| A．Colors and Human Beings |
| B．The Cultural Meaning of Color |
| C．Colors and Personal Experiences |
| D．The Meaning and Function of Color |