剑桥雅思考试全题型预测试题集-1-(含CD光盘2张)

本书特色

《剑桥雅思考试全题型预测试题集》有外语教学与研究出版社和剑桥大学出版社出版。

内容简介

剑桥大学出版社是剑桥大学考试委员会外语考试部雅思培训资料的官方出版机构。“外研社?剑桥雅思考试培训教程”是一套专为雅思考试编写的权威培训教材。教程中的全真试题资料由剑桥大学考试委员会外语考试部提供,极具权威性和实用性。同时,该套教程也是英联邦国家雅思培训机构在雅思培训方面所不可替代的教材。
本书包含4套完整的学术类雅思模拟试题,另外还附有针对培训类雅思的阅读和写作模拟试题。书中介绍了雅思考试的各类题型,并对考试采用的评分系统进行了解释说明。书后附有试题答案和听力录音文本,适合读者自学。可复制使用的答题纸便于读者体会和熟悉真实的考试模式。听力部分的资料配有光盘。

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插图：The quest for a practical match really be-gan after 1781 when a group of Frenchchemists came up with the Phosphoric Candleor Ethereal Match, a sealed glass tube con-taining a twist of paper tipped with phospho-rus. When the tube was broken, air rushedin, causing the phosphorus to self-combust.An even more hazardous device, popular inAmerica, was the Instantaneous Light Box——abottle filled with sulphuric acid into whichsplints treated with chemicals were dipped.The first matches resembling those_usedtoday were made in 1827 by John Walker, anEnglish pharmacist who borrowed the formulafrom a military rocket-maker called Congreve.Costing a shilling a box, Congreves weresplints coated with sulphur and tipped withpotassium chlorate. To light them, the userdrew them quickly through folded glass paper.Walker never patented his invention, andthree years later it was copied by a SamuelJones, who marketed his product as Lucifers.About the same time, a French chemistry stu-dent called Charles Sauria produced the first' strike-anywhere' match by substituting whitephosphorus for the potassium chlorate in theWalker formula. However, since white phos-phorus is a deadly poison, from 1845 match-makers exposed to its fumes succumbed tonecrosis, a disease that eats away jaw-bones.It wasn't until 1906 that the substance waseventually banned.That was 62 years after a Swedish chemistcalled Pasch had discovered non-toxic red oramorphous phosphorus, a development exploit-ed commercially by Pasch's compatriot J ELundstrom in 1885. Lundstrom's safetymatches were safe because the red phosphoruswas non-toxic; it was painted on to the strik-ing surface instead of the match tip, whichcontained potassium chlorate with a relativelyhigh ignition temperature of 182 degrees centi-grade.America lagged behing Europe in matchtechnology and safety standards. It wasn't un-til 1900 that the Diamond Match Companybough