雅思阅读真题（Part 2）
Part 2 · 考频：中频 · 最近考试：2026.2.8武汉汉街
A
According to the United States (US) Centers for Disease Control and Prevention (CDC), more than 80 million American adults are chronically sleep deprived, meaning they sleep less than the recommended minimum of seven hours a night. The resulting fatigue contributes to more than a million auto accidents each year, as well as to a significant number of medical errors. Even small adjustments in sleep can be problematic. The Monday after a daylight-saving time change in the US—when the clocks are moved ahead one hour—there is a 24 percent increase in heart attacks and a jump in fatal car crashes, compared with other Mondays.
完整文章请进入机考练习查看。
答案：D
原文定位：sleep-deprived suspects held by the police will often confess to anything in exchange for rest
答案：E
原文定位：The first of NREM’s four stages is called the shallow end of sleep and is characterized by a distinctive regular pattern of brain activity, as shown on an EEG (electroencephalogram) device—a machine that measures electrical impulses. In stage two, the EEG measures electric sparks that strike the cerebral cortex... In stage three, big, rolling waves of brain activity as measured on an EEG are present less than half the time; in stage four, more than half the time
答案：C
原文定位：in the modern world, our ancient innate wake-up call is constantly triggered by something that is non-life threatening, like worrying before an exam or the unexpected sound of a car alarm. Before the industrial revolution... we could often counteract a sleep deficit by simply sleeping in. That is no longer possible
答案：D
原文定位：In fact, lack of sleep has been directly tied to obesity: without enough sleep, the stomach and other organs overproduce ghrelin, the hunger hormone, causing us to eat more
答案：G
原文定位：Dr. Jeffrey Ellenbogen... argues, "It’s tempting to manipulate sleep with drugs or devices, but we don’t yet understand sleep enough to risk artificially manipulating the parts." Dr. Ellenbogen and other experts argue against shortcuts
答案：F
原文定位：REM (Rapid Eye Movement) sleep was at first believed to be only a variation of a stage in NREM sleep, and not particularly significant. However, once scientists documented the distinctive eye movements in REM, and found that virtually all dreaming takes place during this period, REM sleep was recognized as the second major phase of sleep
答案：A
原文定位：The resulting fatigue contributes to more than a million auto accidents each year, as well as to a significant number of medical errors... there is a 24 percent increase in heart attacks and a jump in fatal car crashes
答案：A NREM sleep is important for maintaining brain function.,D Each stage of NREM sleep has a unique EEG pattern.
原文定位：As we fall into NREM sleep, our brain stays active and begins an editing process—deciding which memories to keep and which ones to ignore. The first of NREM’s four stages is called the shallow end of sleep and is characterized by a distinctive regular pattern of brain activity, as shown on an EEG (electroencephalogram) device—a machine that measures electrical impulses. In stage two, the EEG measures electric sparks that strike the cerebral cortex (gray matter covering the outer layer of the brain) in regular half-second intervals. Researchers believe that this electrical activity helps the cortex preserve and store recently acquired information. Stages three and four have been described as a deep, coma-like sleep that is as essential to our brain as food is to our body. In stage three, big, rolling waves of brain activity as measured on an EEG are present less than half the time; in stage four, more than half the time. It is in this deep sleep that our cells produce most growth hormones, which are needed throughout life to serve bones and muscles
答案：B REM sleep can be identified by an unusual physical feature.,E Some scientists consider REM sleep to be a source of human innovation.
原文定位：REM (Rapid Eye Movement) sleep was at first believed to be only a variation of a stage in NREM sleep, and not particularly significant. However, once scientists documented the distinctive eye movements in REM, and found that virtually all dreaming takes place during this period, REM sleep was recognized as the second major phase of sleep. Today, scientists believe that the content of our approximately two hours of dreams each night in REM sleep is important in the processing of new memories. Some sleep theorists argue that REM sleep is when we are our most intelligent, insightful, creative, and free. It's when we truly come alive. "REM sleep may be the thing that makes us the most human, both for what it does for the brain and body, and for the sheer experience of it," says Professor Michael Perlis