1个月托福阅读备考之备考练习第27天

托福阅读考试应该如何备考?这可能是最困扰考生的一个问题。很多考生就是因为考前没有准备充分，所以使得自己的备考效果不理想，这里小编为大家整理了托福阅读考试备考1个月备考内容整理，希望对大家的托福阅读备考有帮助。大家一起来看看吧。

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官方真题Official24-2 BreathingDuring Sleep睡眠中的呼吸

本篇文章长难句并不多，但大部分学生都觉得难，其中一个重要原因是信息点多且碎，不易定位。今天我们就通过分析这篇文章中的一些句子，寻找其“变身”了的定位词。

1. Of all the physiological differences in human sleep compared with wakefulness that have been discovered in the last decade, changes in respiratory control are most dramatic. Not only are there differences in the level of the functioning of respiratory systems, there are even changes in how they function. (篇章开头主旨句。)

2. During NREM (the phase of sleep in which there is no rapid eye movement) breathing becomes deeper and more regular, but there is also a decrease in the breathing rate, resulting in less air being exchanged overall.

3. First, there may be a brief cessation or reduction of breathing when falling asleep as the sleeperwaxes and wanes between sleep and wakefulness and their differing control mechanisms . (找到 “just before NREM sleepbegins” 了吗?)

4. It takes twice as much effort to breathe during sleep because of greater resistance to air flow in the airways and changes in the efficiency of the muscles used for breathing.(明白为什么“inhalingis like sucking air out of a balloon”了吗?)

5. This reflexive adjustment is totally absent during NREM sleep. Only after several inadequate breaths under such conditions, resulting in the considerable elevation of carbon dioxide and reduction of oxygen in the blood, is breathing effort adjusted.

6. Finally, the coughing reflex in reaction to irritants in the airway produces not a cough during sleep but a cessation of breathing. If the irritation is severe enough,a sleeping person will arouse, clear the airway, then resume breathing and likely return to sleep. (到哪里去找 “a very mildirritation”呢?)

7. The amount of air exchanged is even lower in REM than NREM because, although breathing is more rapid in REM, it is also more irregular, with brief episodes of shallow breathing or absence of breathing.

以上就是小编为大家整理了托福阅读考前1个月备考要点，大家也一起跟着来练习吧。练习方法千千万，总有一种适合你的。希望大家可以总结出适合自己的方法以此来提升自己的托福考试成绩。最后，小编预祝大家托福考试能取得理想的成绩。

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