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牛津版(深圳·广州)初中英语九年级上册Unit 4 Problems and advice 单元基础卷

作者UID:9673734
日期: 2024-11-07
单元试卷
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Many people take running as a way to keep fit. They like to run in hot weather and enjoy the feeling of being wet through with sweat while running. Cold weather during winter months, with low temperatures and freezing cold winds, may keep many people from running in the open air.

However, a new study shows that the drop in temperature is a good reason to run. In fact, running in cold weather helps improve one's performance. Many runners might find it easier to run in winter than in hot weather.

Lower temperatures reduce stress on the body. When you run in cold weather, your heart rate is lower. And the body needs less water on a cold day than in warm weather becausedehydrationlevels are lower in winter than in warmer conditions.

John Brewer is a professor of applied sports science at ST. Mary's University in London. For this study, he and other researchers put a group of people into a room where summer and winter weather conditions are recreated. The test subjects, were asked to run 10,000 meters under both conditions and their biological measurements were recorded and studied.

From the study, every movement runners make produces heat. The heat can be really damaging unless the body can lose it. One way in which people lose heat is by sweating. The body loses heat through droplets of sweet. The body also loses it by transporting the blood to the surface of the skin and it puts more stress on the heart, particularly in hot conditions because it's much harder to lose heat when the outside environment is warm. As the result shows running in hot temperatures results in 6 percent higher heart rates. 

When running in cold conditions, the body does not have to work hard to pump blood to the skin surface. Therefore, it requires less energy. The most important thing for people who run in cold conditions is to wear the right clothing. Keep as dry as possible when exercising in low temperatures. Wear mittens on your hands instead of gloves. Wear more than one layer of clothing to keep sweat away from your skin. So don't let winter weather keep you indoors. Simply get ready for the low temperatures and start running.

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Teachers want to get along with you and enjoy seeing you learn. But teachers and students sometimes have a clash (冲突). This can happen between any two people. If you show your teacher that you want to make the situation better, he or she will probably do everything possible to make that happen. Take these steps if the problem seems difficult to solve.

★Talk to an adult you trust.

★Give it time. You may not feel comfortable at once with your teachers, but that may change as you get to know each other.

★If necessary, talk with your parents about what to do next. Lots of times, a meeting can be set up to discuss the problem. This mayclear the air and make things better. Everyone's goal should be to create trust and kindness.

Your relationship with your teachers is often your first chance to develop a “business relationship”. It is different from your family relationship and friendship, which are built on love. In a business relationship, both parties get something out of the relationship. But they don't necessarily need to be good friends, like each other or understand each other well. They simply need to respect each other and be polite.

When you act this way, and remember that you're not the only kid in the class, you are helping your teacher. Your teacher will notice this. Teachers also like it when students follow directions and when they learn and obey the rules of the classroom. For example, these may be rules about listening when another student is talking, about taking turns, or about raising your hand when you want to say something or ask a question.

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Scientists have known for years that people who exercise can live longer than those who do not.   Some people might think that walking is not helpful enough to offer any health benefits(好处).

They may say that playing sports or running hard would be much better because they burn more energy.

When you stop and think about it, however, walking is one of the things that almost anyone can do at any time. Unlike many sports, you can enjoy doing it alone and you don't need any special equipment(装备).

One of the best things about walking is that it can strengthen your heart.  It will make blood move faster and give your circulatory system(循环系统) a workout. This also helps to manage blood pressure. As a result, you can lower the risk of having a stroke(中风) by up to 27%.

Even a short 30-minute walk at 3 kilometres per hour can burn off 75 calories for a person who weighs 60 kilograms. A daily walking routine can be a good part of a weight loss plan. To lose weight, a walking routine also seems easier to keep than other exercise.

Finally, walking can make you a much happier person! Walking causes some helpful materials in the brain. Walking is an excellent way to make people feel less stressful and angry.

A. They help to make you feel relaxed, more active, and happier.

B. Perhaps one of the best things we can do for our bodies is to simply take a walk.

C. Walking also has many hidden benefits that we are just starting to understand.

D. Even walking slowly will make your heart work better.

E. Walking can also help lose weight.

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