大学四级1092.docx

1、大学四级1092大学四级-1092(总分：713.00，做题时间：90分钟)一、Part Writing(总题数：1，分数：106.00)1.锻炼身体和平衡饮食哪个是保持健康的最佳办法2我的观点（分数：106.00）_正确答案：(The Best Way to Stay HealthyIfyou have recently started or restarted an exercise program，you are not alone，and it proves to be the best way to stay healthyIn the first place，exercise ma

2、kes your body，most importantly，your heart strongerby helping it pump more blood with each heartbeatThe blood then deliver more oxygen to your bodyExercise can also lower blood pressure， reduce your risk of heart diseaseBesides，exercise is the best way to lose weightBurning calories and working off t

3、he fat will help you look and feel betterIn the second place，more and more people realize that mental health is nevertheless more important than physical healthFocusing your energy on taking care of yourself with proper exercise is the best way to not just transform your body but to lift your spirit

4、sIf you are blessed with a healthy body and healthy mind by getting into exercises like soccer，ice skating，jogging， running，swimming，bicycling or anything that involves lots of activities，you can be confident that you are the “wealthiest”，thus the happiest man on the planet earth)解析：二、Part Reading C

5、omprehension (Skimming and Scanning)(总题数：4，分数：70.00)How Exercises WorkWhen you exercise or compete in sports, you notice several things about your body. You breathe heavier and faster, your heart beats faster, your muscles hurt and you sweat. These are all normal responses to exercise whether you wo

6、rk out regularly or only once in a while or whether you are a weekend warrior or a trained athlete. When you watch world-class athletes compete, you see the same responses, only magnified.The body has an incredibly complex set of processes to meet the demands of working muscles. Every system in the

7、body is involved. In this article, we will look at how your body responds to strenuous exercise-how muscles, blood circulation, breathing and body heat are affected. You will also see how these responses can be enhanced by training. Your Bodys Response to ExerciseAny type of exercise uses your muscl

8、es. Running, swimming, weighttiftingany sport you can imagineuses different muscle groups to generate motion. In running and swimming, your muscles are working to accelerate your body and keep it moving. In weightlifting, your muscles are working to move a weight. Exercise means muscle activity!As y

9、ou use your muscles, they begin to make demands on the rest of the body. In strenuous exercise, just about every system in your body either focuses its efforts on helping the muscles do their work, or it shuts down. For example, your heart beats faster during strenuous exercise so that it can pump m

10、ore blood to the muscles, and your stomach shuts down during strenuous exercise so that it does not waste energy that the muscles can use.When you exercise, your muscles act something like electric motors. Your muscles take in a source of energy and they use it to generate force. An electric motor u

11、ses electricity to supply its energy. Your muscles are biochemical motors, and they use a chemical called adenosine triphosphate ( ATP ) for their energy source. During the process of burning ATP, your muscles need three things:They need oxygen, because chemical reactions require ATP and oxygen is c

12、onsumed to produce ATP.They need to eliminate metabolic wastes (carbon dioxide, lactic acid ) that the chemical reactions generate.They need to get rid of heat. Just like an electric motor, a working muscle generates heat that it needs to get rid of.In order to continue exercising, your muscles must

13、 continuously make ATP. To make this happen, your body must supply oxygen to the muscles and eliminate the waste products and heat. The more strenuous the exercise, the greater the demands of working muscle. If these needs are not met, then exercise will cease-that is, you become exhausted and you w

14、ont be able to keep going.To meet the needs of working muscle, the body has an orchestrated response involving the heart, blood vessels, nervous system, lungs, liver and skin. It really is an amazing system!Exercise and ATPFor your musclesin fact, for every cell in your bodythe source of energy that

15、 keeps everything going is called ATP. Adenc, sine triphosphate (ATP) is the biochemical way to store and use energy.The entire reaction that turns ATP into energy is a bit complicated, but here is a good summary:Chemically, ATP is an adenine nucleotide bound to three phosphates.There is a lot of en

16、ergy stored in the bond between the second and third phosphate groups that can be used to fuel chemical reactions.When a cell needs energy, it breaks this bond to form adenosine diphosphate (ADP) and a free phosphate molecule.In some instances, the second phosphate group can also be broken to form adenosine monopho