考试日期： | 2013年4月6日 |
Reading Passage 1 | |
Title: | Radio |
Question types: | Sentence completion填空； Multiple choice单选题 |
文章内容回顾 | 讲收音机的制作历史以及制作步骤和流程 |
英文原文阅读 | Radio is the wireless transmission of signals through free space byelectromagnetic radiation of a frequency significantly below that ofvisible light, in the radio frequency range, from about 30 kHz to 300 GHz. These waves are called radio waves. Electromagnetic radiationtravels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space. Information, such as sound, is carried by systematically changing (modulating) some property of the radiated waves, such as theiramplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extractedand transformed back into its original form. The etymology of "radio" or "radiotelegraphy" reveals that it was called "wireless telegraphy," which was shortened to "wireless" in Britain. The prefix radio- in the sense of wireless transmission, was first recorded in the word radioconductor, a description provided by the French physicist édouard Branly in 1897. It is based on the verb to radiate (in Latin "radius" means "spoke of a wheel, beam of light, ray"). The word "radio" also appears in a 1907 article by Lee De Forest. It was adopted by the United States Navy in 1912, to distinguish radio from several other wireless communication technologies, such as thephotophone. The term became common by the time of the first commercial broadcasts in the United States in the 1920s. (The noun "broadcasting" itself came from an agricultural term, meaning "scattering seeds widely.") The term was adopted by other languages in Europe and Asia. British Commonwealth countries continued to commonly use the term "wireless" until the mid-20th century, though the magazine of the BBC in the UK has been called Radio Times ever since it was first published in the early 1920s. In recent years the more general term "wireless" has gained renewed popularity through the rapid growth of short-range computer networking, e.g., Wireless Local Area Network (WLAN), Wi-Fi, and Bluetooth, as well as mobile telephony, e.g., GSM and UMTS. Today, the term "radio" specifies the actual type of transceiver device or chip, whereas "wireless" refers to the lack of physical connections; one talks about radio transceivers, but about wireless devices and wireless sensor networks. |
题型难度分析 | 根据考生回忆第一篇阅读非常简单，是机经中的一篇。 |
题型技巧分析 | 本篇有填空题，填空题的做题步骤： 1. 读题目要求，主要看字数要求，一般不超过三个或两个，一定要看清楚 2. 读题目，并划出关键词，关键词首先是特殊的比如人名地名时间数字等，如果没有这些词，那就划出名词 3. 对所填的空进行预测，预测所填空的词性，单复数情况 4. 根据划出的关键词去文中定位 5. 对定位部分进行分析，选出答案 选择题的做题步骤 1. 阅读指令 (Instruction) 这一步骤主要是针对多项选择而言的，单项选择题的指令几乎没有作用。在多项选择题中，指令中会提示正确选项的数量，在誊写答题卡的时候，一定要注意多项选择题的题号，一个正确选项占用一个题号。这一点对于初次接触雅思的考生来说要特别引起注意。 2. 阅读题干，划出定位词 由于选择题考察细节的特点，故题干中的词往往能够提供定位 3. 阅读选项，划出核心词 在寻找正确答案之前，一定要事先通读选项，因为选项提供了对原文正确或者是错误的同义转换。但是由于选项较长，不可能一次性全部记住，所以有必要把选项里的核心词划出来，这样可以减轻记忆负担，并且更加有针对性地做题。 4. 找到相关句子段落，摆脱干扰找到答案 这是做题的最后一个步骤，也是最重要的步骤。由于选择项的干扰性往往很强，所以对找到的相关句子或段落一定要进行仔细阅读，排除错误选项。甄别干扰项这一步骤是考生解题的关键，很多考生往往对几个选项犹豫不决，经常跳进题目的陷阱。一般说来，干扰项有如下几个类别： 1) 数字陷阱 选择题的特点便是选项进行深度的同义转换。但是如果个别选项中出现了数字，往往意味着这个数字直接来源于文章，没有进行任何同义替换。这种干扰选项对于根本读不懂原文的考生有着致命的诱惑力，因为只有数字是熟悉的，其它的单词都读不懂。数字选项中，数字在文章中都有提及，但经常是通过移花接木的形式出现的，以干扰考生的注意力。 2) 相似陷阱 同理，如果题目中出现的个别单词与原文中的用词一模一样，尤其是一些经常被同义替换掉的动词、形容词等，这个选项往往就是干扰选项。 3) 偷换概念陷阱 有时候选项中虽然与文中有对应的词，但选项中偷换了关键性的成分（如谓语部分），使得答案错误。 4) 搭配不当陷阱 这是最具有诱惑性的选项。这种选项的特点是：选项本身是正确的，但是跟题干却不能形成搭配关系。很多考生看到选项和原文内容相似，甚至还有同义转换，便毫不犹豫地选择了这样的干扰项。 |
剑桥雅思推荐原文练习 | 剑4 Test 1 Passage 1 剑5 Test 3 Passage 1 |
