1 . On average, Americans spend about 10 hours a day in front of a computer or other electronic devices and less than 30 minutes a day outdoors. That is a claim by David Strayer, a professor of psychology at the University of Utah. In his 2017 TED Talk, Strayer explained that all this time spent with technology is making our brains tired.
Using an electronic device to answer emails, listen to the news and browse the web puts a lot of pressure on the front of the brain, which, Strayer explains, is important for critical thinking, problem-solving and decision-making.
Therefore, it is important to give the brain a rest. And being in nature, Strayer claims, helps a tired brain away from too much technology. More than 15, 000 campers from around the world attended an international camping festival in September. That is when friends and family take time off and escape to nature for several days. They take walks, climb, explore, swim, sleep, eat and play. Camping may be just what a tired brain needs.
Take Carl for example. He lives in West Virginia and enjoys camping. He says that staying outdoors makes him feel at ease. It also prepares him for the work he must do. Kate Somers is another example who also lives in West Virginia. She says she enjoys camping with her husband and two children. She calls it a “regenerative” experience.
At the University of Utah, David Strayer has studied both short-term and long-term exposure to nature. He found that spending short amounts of time in nature without technology does calm the brain and helps it to remember better. However, he found, it is the long-term contact with nature that does the most good. He and his research team found that spending three days in nature without any technology is enough time for the brain to fully relax and reset itself.
1. According to David Strayer, which of the following is true?| A．Americans dislike outdoor activities. |
| B．Electronic equipment should be quitted. |
| C．New technologies also have some downsides. |
| D．Electronic equipment brings great convenience. |
| A．To try another lifestyle. | B．To let our brain relax. |
| C．To make better decisions. | D．To play with our family and friends. |
| A．Refreshing | B．Memorable | C．Remarkable | D．Tiring |
| A．Electronic Equipment Harms the Brain | B．Good Rest Develops Good Memory |
| C．Tips on Using New Technologies | D．Being in Nature Is Good for the Brain |
2 . I suddenly heard an elephant crying as though frightened. Looking down, I immediately recognized that something was wrong, and ran down to the edge of the near bank. There I saw Ma Shwe with her three-month-old calf (幼崽) struggling in the fast-rising water, and it was a life-and-death struggle. Her calf was floating and screaming with fear. Ma Shwe was as near to the far bank as she could get, holding her whole body against the rushing water, and keeping the calf pressed against her huge body. Every now and then the rushing water would sweep the calf away.
There was a sudden rise in the water and the calf was washed clean over the mother’s body and was gone. Ma Shwe turned quickly to reach it and pressed the calf with her head and trunk (象鼻) against the rocky bank. Then with a huge effort, she picked it up in her trunk and tried until she was able to place it on a narrow shelf of rock.
Just at this moment she fell back into the river. If she were carried down, it would be certain death. I knew, as well as she did, that there was one spot where she could get up the bank, but it was on the other side from where she had put her calf.
While I was wondering what I could do next, I heard the sound of a mother’s love. Ma Shwe had crossed the river and got up the bank and was making her way back as fast as she could, roaring (吼叫) all the time, but to her calf it was music.
1. The moment the author got down to the river bank he saw _______,| A．Ma Shwe was placing the calf on the rock |
| B．Ma Shwe was holding the calf against the rushing water |
| C．the calf was washed away by the rising water |
| D．the calf was about to fall into the river |
| A．By putting it on a safe spot. | B．By pressing it against her body. |
| C．By taking it away with her. | D．By carrying it on her back. |
| A．It was a musical note. | B．It was a sign of danger. |
| C．It was a call for help. | D．It was a great comfort. |
| A．A Deadly River | B．A Matter of Life and Death |
| C．A Mother’s Love | D．A Brave Act |
3 . Now satellites are helping to forecast the weather. They are in space, and they can reach any part of the world. The satellites take pictures of the atmosphere, because this is where the weather forms. They send these pictures to the weather stations. So meteorologists（气象学者）can see the weather of any part of the world. From the pictures, the scientists can often say how the weather will change.
Today, nearly five hundred weather stations in sixty countries receive satellite pictures. When they receive new pictures, the meteorologists compare them with earlier ones. Perhaps they may find that the clouds have changed during the last few hours. This may mean that the weather on the ground may soon change, too. In their next weather forecast, the meteorologists can say this.
So the weather satellites are a great help to the meteorologists. Before satellites were invented, the scientists could forecast the weather for about 24 or 48 hours. Now they can make good forecasts for three or five days. Soon, perhaps, they may be able to forecast the weather for a week or more ahead.
1. Why do we use the weather satellites to take pictures of the atmosphere? Because __________.| A．the weather satellites can do it easily | B．clouds form there |
| C．the weather forms there | D．the pictures can forecast the weather |
| A．when they have received satellite pictures |
| B．after they have compared new satellite pictures with earlier ones |
| C．before they received satellite pictures |
| D．during they study satellite pictures |
| A．one day | B．two days |
| C．five days | D．seven days or even longer |
| A．taking pictures of the atmosphere |
| B．receiving pictures of the atmosphere |
| C．weather forecasting |
| D．doing other work in many ways |
What defines a healthy city Is it a place with a lot of open spaces
Copenhageners love to walk. Foot traffic accounts
