1 . Loss of slow-wave sleep as you age may increase your risk of developing dementia (痴呆), according to a new study.
“We found that aging was associated with a decline in the amount of the deepest stages of sleep, known as slow-wave sleep. We then found that people with greater declines in slow-wave sleep over time had a higher risk of getting dementia over the next 17 years of follow-up,” said Matthew Pase, senior author of the study.
Slow-wave sleep is the third and fourth stages of sleep, which is important for brain health. During this stage, the body removes unwanted or harmful materials from the brain. “For the brain, this deep sleep is thought to be the most restorative,” said Dr Richard Isaacson, who wasn’t involved in the study.
The researchers wanted to know whether chronic (慢性的) reductions in slow-wave sleep over time are linked to dementia risk in humans and whether dementia-related processes in the brain may contribute to getting less of this type of sleep. They studied 346 people with an average age of 69 and completed two overnight sleep studies—one between 1995 and 1998 and the second between 1998 and 2001—during which their sleep was monitored. The researchers also investigated whether any change in the amount of slow-wave sleep that participants got was associated with developing dementia up to 17 years after they completed the sleep studies. By that time, 52 participants had been diagnosed with dementia. Each percentage decrease in slow-wave sleep per year was linked to a 27 percent increased risk of developing dementia. The rate of slow-wave sleep loss accelerated (加速) from age 60, peaked from ages 75 to 80and slowed afterwards.
“This is an important study yet again showing the impact of quality of sleep on a person’s risk of cognitive decline and dementia,” Isaacson said. “It’s important to not only pay attention to the total amount of sleep a person gets each night, but also monitor sleep quality as best as possible.”
1. What can we learn from the new study?A.The older you are, the less sleep you will have. |
B.Slow-wave sleep has been linked to the risk of dementia. |
C.The rate of slow-wave sleep loss keeps going up with age. |
D.The amount of sleep has an impact on the risk of dementia. |
A.By making a comparison. | B.By introducing a concept. |
C.By referring to another study. | D.By making a survey. |
A.Sleep quality needs more attention. |
B.We should have enough sleep. |
C.The elderly should sleep more than the young. |
D.The amount of sleep is more important than sleep quality. |
A.Sports. | B.Health. | C.Education. | D.Environment. |
China, the hometown of tea, owns a profound tea culture. Since ancient times, Chinese people have been planting, picking, making and drinking tea. Tea producers have developed six
Tea is
There are many things in senior middle school that I still remember clearly. I studied three years in a country school, which is faraway. However, it has a good environment and strict but kind teachers, so I loved the school and all my teachers very much.
One Friday, just as we began to read books in reading class at our desks, our teacher, Mrs. Hill, said that she needed to be out of the classroom for a few minutes. She asked the class to read in silence while she was gone. And she said that those who didn’t read books in silence would have to be punished when she returned. It was well-known that Mrs. Hill was strict. So we had to be on our best behaviour.
But that Friday, Mrs. Hill hadn’t been gone for ten seconds before some students in the classroom started to talk. From one corner of the room I heard Josh ask Nick, “Can I trade my candies for your toy?” At the other end of the room I heard Samantha tell Kayla, “Let’s sit together on the bus for the museum field trip tomorrow.” And so it went all around me, until about half of the students communicated with each other.
After a while, I, too, forgot about Mrs. Hill’s instructions. I turned back and asked my friend Liza, “Can I borrow your storybook and keep it for a day?” As soon as the words were out of my mouth, Mrs. Hill walked into the classroom. The whole class returned to silence immediately. And we were full of fear.
Mrs. Hill slowly looked around the classroom and said, “If you were talking while I was gone, then please stand up.” The guilt (内疚) suddenly weighed heavily on me. “I shouldn’t have talked while she was not in the classroom. And now I should be honest and admit my mistake bravely. This is what my parents have always told me.” I thought. Then, I summoned up (鼓起) my courage to stand up, worried about the punishment that waited for me. Then I looked around.
注意: 1.续写词数应为150左右;2.请按如下格式在答题卡的相应位置作答。
To my surprise, no one followed me and I was the only one in the classroom standing.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________With Mrs. Hill’s encouragement, another student stood up.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________注意:1.词数80左右;2.可以适当增加细节,以使行文连贯。
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5 . To improve road safety and raise awareness among Russia’s notoriously (臭名昭著地) careless drivers, Russian police have tried to get drivers to slow down at zebra (斑马) crossings by having painted horses as zebras walk across on the busiest streets in some of the big cities.
The light grey horses, painted with black stripes (条纹), carried signs on their backs reading: “Careful, children are on their way to school.” The police sent the “zebras” to several different locations in the Russian capital, where officials in orange vests walked them over zebra crossings and handed out leaflets (传单) to passing drivers.
Some held up rainbow-coloured umbrellas over the painted animals to protect them from the rain. Russian roads are notoriously dangerous and drivers still rarely take steps to avoid pedestrians. Nearly half of all traffic accidents in the country’s big cities are caused by cars hitting pedestrians, and a third of those occur on crossings, according to traffic police figures published last month.
In the first six months of this year, 378 people were killed and more than 6, 600 injured on pedestrian crossings in Russia, according to police. In Moscow alone, 43 people were killed, including two children.
Though police officials said that only safe paint would be used on the animals, animal rights activists still disagreed with the idea, accusing the police of “treating animals like garbage”.
“Children understand that paints are bad for animals,” the Interfax news agency quoted president of Vita animal rights group Irina Novozhilova as saying.
Let’s hope this part of the campaign is over and animals are left out of future attempts to raise pedestrians’ awareness.
1. Why do Moscow police have “zebras” walk across on the busiest streets?A.To make a call on protecting animals. |
B.To raise drivers’ awareness of road safety. |
C.To tell people it is dangerous to cross streets. |
D.To remind people zebras are in danger of extinction. |
A.The zebras. | B.The policemen. | C.The horses. | D.The drivers. |
A.Russian drivers seldom give way to pedestrians. |
B.Russian drivers often ignore traffic lights. |
C.most Russian drivers have realized the seriousness of the problem. |
D.the driving skills of Russian drivers are bad. |
A.Drivers must slow down at pedestrian crossings. |
B.Road safety should be improved. |
C.The paints used on the horses are safe. |
D.These animals are ill-treated by the police. |
6 . We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons: most of them move to find food more easily, but others move to get away from places that are too crowded.
When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration (迁徙)is probably the migration of the fish, which is called “salmon”. This fish is born in fresh water but it travels many miles to salt water. There it spends its life. When it is old, it returns to its birthplace in fresh water. Then it gives birth and dies there. In northern Europe, there is a kind of mice. They leave their mountain homes when they become too crowded. They move down to the low land. Sometimes they move all the way to the seaside, and many of them are killed when they fall into the sea.
Recently, scientists have studied the migration of a kind of lobster (龙虾). Every year, when the season of bad weather arrives, the lobsters get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this, and nobody knows where they go.
So, sometimes we know why humans and animals move from one place to another, but at other times we don’t. Maybe living things just like to travel.
1. Most animals move from one place to another at a certain time to .A.give birth | B.enjoy warmer weather |
C.find food more easily | D.find beautiful places |
A.salt water | B.rivers | C.fresh water | D.its birthplace |
A.to the fresh water | B.to the undersea |
C.at a certain time | D.to find more food |
A.Animals move in order to find food more easily. |
B.The migration of the fish called “salmon” is the most famous migration. |
C.Living things move from one place to another because they like to travel. |
D.Sometimes we know why and how living things move from one place to another, but sometimes we don’t. |
7 . When you step into a new environment, you must have a strong wish to fit in. Fitting in means making more friends, having more influence on others and getting more chances to live a happier life.
Be confident. Confidence attracts most people. Everyone is special and there is only one person like you in this world. Spend some time thinking about your strong points.
Be kind to everyone. Kindness is the bridge to your own happiness. When people notice your kindness, they will return it one day. Always give more than you receive, and think more of others than of yourself.
Do smile to everyone every day. It makes both you and others feel happy.
If you follow what is mentioned above, you will be accepted by people around you. As a result, you will fit in very well and enjoy your new life.
A.Be active in group activities. |
B.A pleasant smile costs the least and does the most. |
C.Here is some advice that can help you. |
D.If so, you will be able to build up confidence step by step. |
E.A person who cares for others is popular everywhere. |
F.However, everybody needs friends. |
G.Even so, it often leaves one to wonder if we fit in well. |
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