10.Some people say that the best way to reduce the size of your waist is to do stomach exercise.Many people believe that when specific muscles are exercised,the fatty tissues (組織) in the immediate area are burned up.The truth is that exercise burns fat from all over the body and not from one specific area.Of course,if you reduce the fat throughout your body,you will certainly see results around your waist too.
Some people believe that you need to exercise twice a week in order to keep a sufficient level of physical fitness.However,studies directed by American scientists show that unexercised muscles lose their strength very quickly.Within 48to 72hours,you must use the muscles again to reestablish (重建) the good physical effects.And what does that mean to you?American scientists concluded that while daily exercise is most helpful,exercising every other day or three days a week will keep a sufficient level of physical fitness.
Is it true that you burn more calories running one mile than walking the same distance?The answer is no.The truth is that you use the same amount of energy whether you walk or run the mile,since in both cases you are moving the same weight the same distance.The speed does not matter.Of course,if you run rather than walk for 30minutes,you will cover more distance,and therefore burn more calories.
If your breathing doesn't return to normal within 5minutes after you finish exercising,you have exercised too much.Five minutes or so after exercising,your breathing should be normal,your heart shouldn't be beating loudly,and you shouldn't be tired.
21.If you want to reduce the fat around your waist,you shouldC.
A.do stomach exercise
B.exercise the waist
C.exercise all the muscles of your body
D.run fast for 30minutes
22.From the second paragraph,we learn thatD.
A.we only need to exercise twice a week
B.we should exercise three times a week
C.muscles lose their strength after 48hours
D.we should exercise every other day,or three days a week
23.It can be inferred from the third paragraph thatD.
A.you will lose more weight running one hour than walking one hour
B.whether you run one mile or walk the same distance,you use the same amount of energy
C.you will lose more weight running one mile than walking the same distance
D.both A and B
24.If you have exercised too much,A.
A.your breathing will take longer than 5minutes to return to normal after you finish exercising
B.your breathing will return to normal within 5minutes after finishing exercising
C.your heart will not be beating loudly
D.you will be too tired to move
25.This passage tells us thatC.
A.it is better to do more running than walking
B.the more exercise you do,the healthier you will be
C.the unexercised muscles must be used again within 48 to 72 hours
D.in order to lose weight,you have to run fast.
分析 本文屬于科普文,講述了美國科學(xué)家得出結(jié)論是每兩天鍛煉一次或每周鍛煉三天有助于健康,并告訴我們身體上沒有鍛煉到的肌肉失去力量很快,需要在48到72小時內(nèi)再次得到鍛煉才能維持其好的鍛煉效果.
解答 21-25 CDDAC
21.C 細節(jié)理解題. 由第一段The truth is that exercise burns fat from all over the body and not from one specific area.Of course,if you reduce the fat throughout your body,you will certainly see results around your waist too.我們可以得知每一項運動都能使全身的肌肉活動,因此減去的是全身的脂肪,而不是某個部位的脂肪.故答案選C.
22.D 細節(jié)理解題. 依據(jù)為第二段的最后一句話American scientists concluded that while daily exercise is most helpful,exercising every other day or three days a week will keep a sufficient level of physical fitness.可知,美國科學(xué)家得出結(jié)論是每兩天鍛煉一次或每周鍛煉三天有助于健康,故答案為D.
23.D 推理判斷題. 從第三段的第三句話The truth is that you use the same amount of energy whether you walk or run the mile,since in both cases you are moving the same weight the same distance.可知無論是跑還是走同樣距離,燃燒的能量是一樣的,所以B表述正確;根據(jù)本段最后一句話Of course,if you run rather than walk for 30minutes,you will cover more distance,and therefore burn more calories.可知,如果跑和走的時間一樣,跑步燃燒的能量更多,所以A表述正確,故答案為D.
24.A 細節(jié)理解題. 根據(jù)最后一段的第一句話If your breathing doesn't return to normal within 5minutes after you finish exercising,you have exercised too much.可知運動后五分鐘內(nèi)呼吸與心跳恢復(fù)不到正常狀態(tài)說明運動過量,故答案為A.
25.C 細節(jié)理解題. 根據(jù)第二段中的"However,studies directed by American scientists show that unexercised muscles lose their strength very quickly.Within 48 to 72 hours,you must use the muscles again to reestablish the good physical effects."這兩句可知,沒有鍛煉到的肌肉失去力量很快,需要在48到72小時內(nèi)再次得到鍛煉才能維持其好的鍛煉效果,故答案為C.
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