题型:阅读表达 题类:常考题 难易度:普通
北京101中学2020届上学期初中九年级开学摸底考试英语试卷
When an animal helps another animal, it usually gets something valuable (有价值的) in return. For a long time, many scientists thought that only people could act generously (慷慨地) just because it feels good.
However, a new study in Germany suggests that chimpanzees (an animal like a large monkey without a tail) also do good things for no real reason. And so do children who are as young as 18 months of age. Maybe it is because humans and chimpanzees share an ancestor about 6 million years ago.
People and chimpanzees appear to develop such features without any other training, says Warneken, a scientist in Germany.
Warneken and his partners worked on adult chimpanzees that live on an island in the African country of Uganda. They also worked with 18—month—old children in Germany. The researchers performed three experiments on the adult chimpanzees and two experiments on the kids. In the first animal experiment, a person tried to reach his arm into a cage to get a stick, but he couldn't reach it. A chimpanzee was in the cage, and it could reach the stick if it wanted to.
Thirty-six chimpanzees took part in this experiment one by one, and no chimpanzee saw what the other chimpanzees had done. Even though the animals hadn't met the person before, they usually took the stick and gave it to the person. What's more, they did this whether or not the person gave them bananas as a reward (奖励).
In a similar experiment, 36 children acted in a similar way. They helped the person reach the stick, whether or not they were given toys for their help.
Researchers did other experiments on chimpanzees and babies. No rewards were given in either experiment. And still, both the chimpanzees and children went out of their way to help.
A. Try getting a group of friends or family together. B. This could be fast walking or cycling on a flat road. C. Regular activity benefits your health in many ways. D. You should get more exercise and eat less to keep fit. E. Joining a sports club is a cheap way of getting exercise. F. Many of us spend seven hours or more just sitting on a chair each day. |
How much physical activity do you do in a week? Are you getting enough exercise?{#blank#}1{#/blank#} For example, people who exercise regularly are less likely to suffer from many diseases. Regular exercise reduces the risk of early death by 30%. It also improves your sleep quality.
Today, most adults are much less active than in the past because our jobs are far less physical than the work our grandparents used to do. {#blank#}2{#/blank#} This lack of regular physical activity means people burn fewer calories than in the past, so we need to do something to consume (消耗) our energy. Experts think adults need to do 2. 5 hours of moderate exercise per week. {#blank#}3{#/blank#}
Exercise can be expensive, but it doesn't have to be. Team sports such as football can be cheap because all the players share the cost of the field. {#blank#}4{#/blank#} It can also be very social.
If you don't want to spend any money, try one of the following activities. Go for a run. The only equipment you need is a pair of running shoes. If you take the bus, try getting off one stop early and walking the extra distance. Go to the park. {#blank#}5{#/blank#} You can play different kinds of games there. This is a great way to involve family members and friends.
In short, there are many easy ways of keeping fit. If we all recognize the value of doing this, we will live longer and be healthier.
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