Question

15．When we exercise hard，we burn fat （脂肪）．But have you ever wondered where exactly the fat goes？
Some doctors think that fat is changed into heat and given off in the air．Others think the body burns it．Some even joke that someone comes and takes it．That's why you always weigh less in the morning．
Now a new study from Australia solves the mystery．
"The correct answer is that most of the fat is breathed out as CO₂．It goes into thin air，"says the study．
Scientists followed the atoms （原子）in 10 kilograms of fat as they are lost．They found that 8.4 of those kilograms are breathed out as CO₂ through the lungs （肺）．The other weight，1.6 kilograms，bccomes water and leaves the body．
"None of this is easy to understand because we can't see the CO₂ we breathe out，said the study's lead expert．
Does that mean you can lose more weight by breathing more？It is not as easy as you think．Breathing more than the body's metabolic rate （新陳代謝速度）can make you uncomfortable．You may feel dizzy （眩暈的）and become unable to see，move or feel，according to the study．
So how can people lose weight healthily？The key is to eat less and move more．You may have heard this many times．During a day．a(chǎn) 70kg person breathes out about 200g of CO₂．So if the same person wants to lose weight，he or she can do some light exercise，for example，walking fast．This can help lose 24Og of CO₂．

根據(jù)短文內(nèi)容．選擇圾佳答案．
36．Where is the new study from？B
A．Japan．
B．Australia．
C．Canada．
D．America．
37．According to the new study，where does our fat go when we exercise a lot？D
A．The body burns it．
B．Someone comes and takes it．
C．It is changed into heat and given off in the air．
D．Most of it is breathed out as CO₂．
38．What will happen to people if they breathe more than the body's metabolic rate？C
A．They will lose weight healthily．
B．They will feel comfortable．
C．They may become unable to move．
D．They may becomc healthier．
39．Which of the following is the best way to lose weight？C
A．Sitting still and breathing more．
B．Sleeping a lot and breathing more．
C．Eating less and exercising more．
D．Eating more and doing some light exercise．
40．The passage mainly tells usA．
A．where fat goes when we exercise
B．why we can lose weight healthily
C．how we should do some exercise
D．what we should do to burn fat．

Answer 1

分析 本文屬于說明文閱讀，作者通過這篇文章向我們介紹了當我們鍛煉時脂肪的去向，它們會通過我們的呼吸轉(zhuǎn)變成二氧化碳，而最好的減肥方式就是少吃多鍛煉．

解答 36．B  細節(jié)理解題，根據(jù)第三段Now a new study from Australia solves the mystery．可知這項新的研究來自于澳大利亞，故選B．
37．D  細節(jié)理解題，根據(jù)第四段The correct answer is that most of the fat is breathed out as CO2．It goes into thin air，"says the study可知當我們鍛煉的時候大部分的脂肪通過我們的呼吸轉(zhuǎn)變成了二氧化碳，故選D．
38．C  細節(jié)理解題，根據(jù)倒數(shù)第二段．Breathing more than the body's metabolic rate （新陳代謝速度）can make you uncomfortable．You may feel dizzy （眩暈的）and become unable to see，move or feel，according to the study．可知如果人們的呼吸速率比身體的新陳代謝速率快，那么你會感到不舒服，頭暈，甚至不能移動，故選C．
39．C  細節(jié)理解題，根據(jù)最后一段So how can people lose weight healthily？The key is to eat less and move more．可知最好的減肥方式就是少吃多鍛煉，故選C．
40．A  主旨大意題，根據(jù)第一段When we exercise hard，we burn fat （脂肪）．But have you ever wondered where exactly the fat goes并通讀全文可知這篇文章主要向我們介紹了我們鍛煉時脂肪都去哪了，故選A．

點評 考查學生的細節(jié)理解和推理判斷能力．做細節(jié)理解題時一定要找到文章中的原句，和題干進行比較，再做出正確選擇．在做推理判斷題時不要以個人的主觀想象代替文章的事實，要根據(jù)文章事實進行合乎邏輯的推理判斷．