For many of us, a little time with our smartphones or iPads before sleep is the

题文

For many of us, a little time with our smartphones or iPads before sleep is the highlight of the night. But would you still think it is relaxing if you knew that it damages or destroys your sleep? Scientists say that's exactly what it does.In ancient times, when there were no lamps, telephones or smartphones, the sun was the main source of light. When the sun went down, our brains took that as a signal to start producing melatonin(褪黑素), a chemical that helps us sleep.However, a healthy amount of melatonin can only be produced in complete darkness.Any light in your bedroom—even the one on the alarm clock or the charging indicator on your cellphone—could disturb the process, not to mention something as bright as smartphone and iPad screens. We tend to hold the much clor than a television or laptop, which allows them to shoot far more light straight into our eyes.“This is particularly worrisome in populations such as young adults and adolescents, who already tend to be night_owls，” said rearcher Brittany Wood at Renslaer Polytechnic Institute.“Lack of sleep among teens is leading to depression, lf­harm, low concentration and poor performance at school，” she added.While all lights are the enemy of sleep, not all colors of light have the same effect. Our eyes are particularly nsitive to blue light, which is common during the day. Most of the light coming from electronic screens is blue light and it fools our brain into thinking it's still daytime. By contrast, orange or red light has less influence on melatonin production, becau our brains recognize it as a signal that the day is ending, according to The Telegraph.Asking yourlf to keep your hands off your smartphone before bedtime might em unreasonable, but you should at least remember to dim the screen or hold it farther away from your eyes. You could also wear a pair of orange sunglass that take away the harmful blue light.小题1:According to the passage, we can know ________.A．it's a good habit to play with smartphones or iPads late into nightB．scientists suggest we should avoid using smartphones or iPadsC．darkness makes a great impact on the amount of melatoninD．the sun was the only source of light in ancient times小题2:Which of the following is TRUE according to the passage?A．The darker it is, the more melatonin will be produced.B．The lighter it is, the more melatonin will be produced.C．The more melatonin you have, the wor you'll sleep.D．The more electrical equipment you have, the more melatonin will be produced.小题3:The underlined part in Paragraph 4 refers to tho ________.A．who are young adults or adolescentsB．who don't perform well in schoolC．who are addicted to a television or laptopD．who are short of sleep at night and perform poorly in daily life小题4:In the writer's opinion, which is a correct suggestion?A．You should go to bed when the sun goes down.B．You should u an orange or red light electronic screen.C．You should wear a pair of blue sunglass when sleeping.D．You should avoid blue light as possible as you can before bedtime. 题型：未知难度：其他题型

答案

小题1:C小题2:A小题3:D小题4:D

解析

本文是一篇科技说明文。研究发现，睡前玩手机可能会影响睡眠状况。小题1:答案：C 推理判断题。根据第二段最后一句及第三段第一句可知，C项正确；根据第一段内容可知，A项错误；根据文章内容可知，科学家们只是建议睡前不要玩手机，故B项错误；根据第二段中的“In ancient times，when there were no lamps，telephones or smartphones，the sun was the main source of light.”可知D项为错误结论。小题2:答案：A 推理判断题。根据第二段中的“our brains...a chemical that helps us sleep”及第三段首句“However，a healthy amount of melatonin can only be produced in complete darkness.”可知A项正确并排除B、C两项。根据第三段中的“even the one on the alarm clock or the charging indicator on your cellphone—could disturb the process，not to mention something as bright as smartphone and iPad screens.”可排除D项。小题3:答案：D 推理判断题。根据第四段内容尤其是最后一句可知，night owls指的就是晚上熬到很晚，缺乏睡眠，然后白天不能集中精神，表现不好的那些人。故D项正确。小题4:答案：D 细节理解题。根据倒数第二段内容可知，并不是所有颜色的光都会产生同样的作用。我们的眼睛对蓝色的光尤为敏感，它会传递给我们的大脑错误的信息，让大脑以为还在白天，因此会影响我们的睡眠，所以在睡觉前应避免接触蓝光。D项正确。

考点

据考高分专家说，试题“For many of us, a li.....”主要考查你对 [日常生活类阅读 ]考点的理解。 日常生活类阅读

日常生活类阅读的概念：

日常生活这一话题主要涉及人们衣食住行等方面的活动。这一话题的选材主要针对人们日常的工作，生活以及学习情况。做这一类题时，最主要的是要把握好人物的活动内容，时间和地点。

日常生活类阅读题答题技巧：

【题型说明】该类文章内容涉及到人们的言谈举止、生活习惯、饮食起居、服饰仪表、恋爱婚姻、消遣娱乐、节日起源、家庭生活等。文章篇幅短小，追根溯源，探索各项风俗的历史渊源，内容有趣。命题也以送分题为主，如事实细节题、语义转换题、词义猜测题和简单推理判断题等。虽然这类文章读起来感觉轻松，试题做起来比较顺手，但绝不能掉以轻心。因为稍不留神，就会丢分。 【备考提醒】为了保证较高准确率，建议同学们做好以下几点： 1、保持正常的考试心态。笔者在教学中发现，越是容易的试题，同学们越是容易失分。为什么呢？因为在这种情况下，同学们极易产生麻痹思想，认为题目好做，就不引起高度重视，于是思维不发散、不周密。而命题人就是利用同学们的这一弱点，设计陷阱题。所以，无论试题难易与否，我们都要保持正常的考试心态。试题容易，不欣喜；试题难，不悲观。 2、根据前面讲到的方法，认认真真、细细心心做好事实细节题。 3、做好语义转换题。这类题是根据英语中一词多义和某些词语在文中能表达一定的修辞意义的原则而设计的。要求同学们解释某生词的含义，确定多义词或短语在文中的意思，确认文中的某个代词所指代的对象，或者对英语中特有的表达、格言、谚语进行解释。这种题要求同学们一定要根据上下文猜测词义或理解句子，切不可望文生义。 4、做好简单推理判断题。简单推理判断题要以表面文字为前提，以具体事实为依据进行推理，做出判断。这种推理方式比较直接，只要弄清事实，即可结合常识推断出合理的结论。