剑桥雅思5 G类 TestA Section3阅读答案解析 Lack of sleep
剑桥雅思5 G类部分TestA Section3的主题为睡眠缺乏。具体内容包括正常人每天所需要的睡眠时间，睡眠的目的，睡眠不足的影响，睡眠的五个阶段，年龄对睡眠的影响，改善睡眠的手段，以及褪黑素的作用等。下面是具体每道题目的答案解析。
剑桥雅思5 G类 TestA Section3阅读答案解析
老烤鸭雅思原创解析，请勿抄袭转载
第28题答案：A
对应原文：A部分：It is estimated that the average man or woman needs between seven-and-a-half and eight hours’ sleep a night. Some can manage on a lot less. Baroness Thatcher, for example, was reported to be able to get by on four hours’ sleep a night when she was Prime Minister of Britain.
答案解析：A部分提到，普通人平均需要7个半小时到8小时的睡眠。撒切尔在担任英国首相期间则每天只睡4个小时。即不同人所需要的睡眠时间，由此确定A为正确答案。
第29题答案：C
对应原文：C部分：Researchers in San Diego deprived a group of men of sleep between 3 am and 7 am on just one night, and found that levels of their bodies’ natural defenses against viral infections had fallen significantly
答案解析：C部分主要讲述睡眠缺乏的影响。具体来说研究人员剥夺了实验者凌晨三点到七点的睡眠，发现他们身体的免疫力明显下降。即对剥夺睡眠的调查，由此确定为答案。
第30题答案：E
对应原文：E部分：Sleeping patterns change with age, which is why many people over 60 develop insomnia … Causes can be anything from pregnancy and stress to alcohol and heart disease.
答案解析：E部分一开始就提到，年龄增长会改变睡眠模式。后面又指出怀孕、压力、酒精和心脏病都会引发失眠。对应题干中睡眠紊乱的原因，由此确定为正确答案。
第31题答案：F
对应原文：F部分：Apart from self-help therapy such as regular exercise, there are psychological treatments, including relaxation training and therapy aimed at getting rid of pre-sleep worries and anxieties.
答案解析：F部分中提到各种改善睡眠的方法，比如经常锻炼，放松训练，严格控制睡眠和起床时间等。与题干完全对应，由此确定为正确答案。
第32题答案：B
对应原文：The latest beliefs are that the main purposes of sleep are to enable the body to rest and replenish, allowing time for repairs to take place and for tissue to be regenerated.
答案解析：B部分提到，睡眠的主要目的是让身体得以休息和补充，使得修复有时间进行，组织有时间再生。即睡眠帮助我们维持身心健康的过程。
第33题答案：G
对应原文：G部分：Nicholls, sales manager of one of America’s largest health food shops, claims that sales of the pill have increased dramatically.
答案解析：G部分提到了褪黑素对提升睡眠的作用。根据老烤鸭雅思美国最大的健康食物店铺之一的销售经理Nicholls的说法，这种药品的销量显著上升。即一种治疗失眠的商业化的人造产品，由此确定其为正确答案。
第34题答案：E
对应原文：E部分：Sleeping patterns change with age, which is why many people over 60 develop insomnia
答案解析：E部分提到，睡眠习惯会随着年龄而变化，这也是为什么60岁以上的老人往往失眠。后面还详细指出这种变化是由某种荷尔蒙引起的，对应题干中的physical changes，由此确定为正确答案。
第35题答案：D
对应原文：D部分：research shows that, in an average night, there are five stages of sleep and four cycles
答案解析：D部分提到，在日常夜晚，睡眠会分为5个阶段和4个周期，随后详细介绍了这5个阶段是什么。对应题干中the processes involved during sleep，由此确定为正确答案。
第36题答案：NOT GIVEN
对应原文：无
答案解析：原文只提到睡眠能够促进身体修复，缺乏睡眠会降低免疫力，但并没有任何地方提到它可以治疗疾病，由此判断答案为NOT GIVEN。
第37题答案：TRUE
对应原文：D部分：research shows that, in an average night, there are five stages of sleep and four cycles
答案解析：从D部分这句话中可以看出，晚上的睡眠分为5个阶段，它们会循环4次。题干中occur more than once a night的说法与此相符，由此判断答案为TRUE。
第38题答案：FALSE
对应原文：D部分：In stage four, usually reached after an hour, the slumber is so deep that, if awoken, this article is from laokaoya website, the sleeper would be confused and disorientated. It is in this phase that sleep-walking can occur
This REM phase is also the time when we dream.
答案解析：梦游往往发生在睡眠的第四阶段，而做梦则发生在第五阶段（REM），可见两者所处阶段并不一致，由此判断答案为FALSE。
第39题答案：FALSE
对应原文：D部分：During this stage, the body is almost paralysed. This REM phase is also the time when we dream.
答案解析：原文中提到，在REM阶段，我们的身体几乎瘫痪，也就是一动不动。题干中move around a lot的说法与此对立，由此判断答案为FALSE。
第40题答案：TRUE
对应原文：E部分：The temperature rise occurs at daybreak in the young, but at three or four in the morning in the elderly.
答案解析：年轻人会在黎明时分体温上升，而老年人则是早上3,4点。可见老年人比年轻人早，由此判断答案为TRUE。
剑桥雅思5 G类 TestA Section1阅读答案解析 Mail Order Brochure
剑桥雅思5 G类 TestA Section1阅读答案解析 New Book Releases
剑桥雅思5 G类 TestA Section2阅读答案解析 Work and Travel USA
剑桥雅思5 G类 TestA Section2阅读答案解析 Arthur Phillip College
