新概念英语青少版3A-Unit-11-Turn-it-down

1、Unit 11 Turn it down!Do you like these?你对分贝了解多少？ 分贝（decibel）dB 分贝是以美国发明家亚历山大格雷厄姆贝尔（英国人，后移居美国）命名的，他因发明电话（1875年贝尔制成了实用的电话装置，1876年建起了世界上第一家电话公司。）而闻名于世。 你知道一个声音与另一个声音结合时，会产生什么结果吗？我们都知道60个苹果加60 个苹果，等于120个苹果。但是，这并不适用于以分贝来表示的声音。事实上，60分贝加60分贝只等于63分贝。 分贝对人的影响有什么？ 1020分贝几乎感觉不到。 2040分贝相当于轻声说话。 4060分贝相当于室内谈话。 6

2、070分贝有损神经。 你对分贝了解多少？ 7090分贝很吵。长期在这种环境下学习和生活，会使人的神经细胞逐渐受到破坏。 90100分贝会使听力受损。 100120分贝使人难以忍受，几分钟就可暂时致聋。 一般声音在30分贝左右时，不会影响正常的生活和休息。 而达到50分贝以上时，人们有较大的感觉，很难入睡。 维塔斯的高音是105分贝，而飞机起飞时螺旋桨发出的声音才110分贝！New words and Expressions loud adj. 大声的，喧闹的 turn it down 把.关小，调低 interrupt v. 打断 hearing n.听觉 sound n. 声音，响声 dea

3、f adj. 聋的 limit n. 限度，极限 decibel n. 分贝（音量单位） continuous adj. 连续不断的 sudden adj. 突然的New words and Expressions damage n. 损害 nightclub n. 夜总会 MP3 player n. MP3播放器 experience v. 经历，体验 if adv. conj. 如果 unlucky adj. 不幸的，倒霉的 for ever adv. 永远 level n. 水平 it doesnt matter 没关系 hire v. 租用New words and Expressio

4、ns fail v. 没有通过（考试） accident n. 事故 ambulance n. 救护车 robbery n. 抢劫 fire n. 火灾，失火 fire service n. 消防署，消防队 thief n. 贼，小偷 prison n. 监狱 apologize v. 道歉 a day off 休息一天 pop concert n. 流行音乐会流行音乐会ambulancecontinuousfail limitlevel damageloud事故 prison打断听觉deaf thief hire没关系 抢劫分贝nightclub 消防队突然的 apologize不幸的 Ke

5、y words failfeil -failurefeilj n 1. 表示“失败”，通常是不及物动词。表示在某一方面失败，通常用介词 in。 e.g: He failed in business. 他经商失败。 2. 表示“(考试)不及格”，fail 可用作及物或不及物动词(以及物动词为多见)，所以在下面例句中 fail 后的介词 in 省略了： He failed (in) his driving-test. 他驾驶考试没及格。 3.其后可接不定式，意为“不能”“没有”“忘记”等。e.g: He failed to pass the exam. 他考试没有及格Key words apolo

6、geze vi.道歉，认错；辩解，辩护 e.g: I apologize for being late. Apologize to your husband for anything you did wrong 习惯用语 apologize to sb. 向某人道歉 apologize to sb. for sth. 向某人为某事(为做了某事)道歉 apologize to sb. for doing sth. 向某人为某事(为做了某事)道歉 apologize for oneself 为自已解辩或辩护 Lucy: Dad, that musics loud! Turn it down! Wi

7、lliam: Sorry, Lucy! Am I interrupting your homework? Lucy: Its not that, Dad. We had a lesson today about hearing. Look at this.Unit 11 Turn it down!Notes on the Text interrupt & interruption n. e.g: He tried to speak, but she interrupted him. interrupt 是打断的意思，主要打断别人正在进行的事情，如谈话，或者工作。 disturb是打扰的

8、意思，主要是打扰别人休息。 bother是烦扰的意思，主要是指在某一时间段里，持续打扰别人并使别人烦恼。 that, 代词，指代前面的一整句。 One person in seven in the UK is deaf, and many of them are deaf because of noise. For most people, the safe limit is 85 decibels(dB) for continuous noise, and 103 dB for sudden noise. After fifteen minutes at 105 dB, most peopl

9、e will have some damage to their hearing.Unit 11 Turn it down!Notes on the Text One person in seven in the UK is deaf 谓语动词用单数，两个in分别表示时间和地点，不做主语。 because of，of为介词，后跟名词。 e.g: Im here because of you. because conj. 其后接原因状语从句或回答以why开头的问句； e.g: Because he is ill, he is absent today. decibel 复数：decibels e

10、.g: Continuous exposure to sound above 80 decibels could be harmful. Music in nightclubs is often much louder than the safe limit.19% of young people listen to their MP3 players at 105 to 110 dB for many hours. 75% of them will experience ringing in the ears,and they will feel a bit deaf. If they ar

11、e lucky, this will last for one or two days. If they are unlucky, the damage will last for ever.Unit 11 Turn it down!Notes on the Text much louder, 通常用much修饰形容词或副词的比较级，表示.得多。 类似的词还有 a bit，a little，rather，far，by far，many，a lot，lots，a great deal，any，still，even e.g: We will be a much better football te

12、am next year. experience n.经验，（不可数名词）；经历 vt.亲身参与，亲身经历；感受；发现 e.g: He has also had managerial experience on every level. I should not be in any danger here, but experience has taught me caution. We had never experienced this kind of holiday before and had no idea what to expect.Notes on the Text If th

13、ey are lucky, this will last for one or two days. 在由if引导的条件状语从句中，我们遵循主将从现的原则。即：主句用一帮将来时，从句用一般现在时。 e.g: If it is fine tomorrow, we will go outing. 在时间状语从句中，我们也遵循主将从现的原则。 常见的时间状语从句的连词有：as soon as, when, while , as, until等。 e.g: When I grow up, Ill be a nurse and look after patients Lucy: Youre always listening to loud music, Dad. If you arent careful, youll become deaf. William: Sorry, Lucy! What did you say? Lucy: Oh, Dad! It isnt funny! William: Of course it isnt. And I will turn the sound down. I promise!Unit 11 Turn it down!条件状语从句Notes on the Text promise （v. 允诺，许诺） to do sth e.g: