托福听力中历史话题的概率很高，可以说是热门话题之一。因此，掌握内容重点可以有效提高考生听力答题的准确性。要做到这一点，考生首先需要了解听力内容中的关键要素是什么。下面由新航道的沈阳托福小编为您解答！
历史话题核心要素一：主题关键词
与发展、起源或历史相关的词汇总是出现在主题关键词中(e.g develpoment, change, origin, historical)，举例来说：
Professor: And what instrument comes to mind when you think of rock ‘n' roll?
Student: The electric Guitar?
Professor: Exactly. I think it's fair to say that the sound of the electric guitar typifies the rock ‘n’ roll genre,which became popular in the 1950s. But really the instrument we know today was the result of a continuing development that started for our practical purposes in the 1920s. But long before that even,people were experimenting with ways to modify traditional acoustic guitars.
注意到文章开头做了两件事：一：. 提出话题“ Electrical Guitar”; 二. 提出了历史文章的要素，教授提到电吉他是一个“the result of a continuing development而且大家很早就开始“”了 modify acoustic guitar自然，我们可以推断这篇文章是关于电吉他是如何发展的。
历史话题核心要素二：影响历史话题：
所谓影响，包括话题的发展；发展中的影响；影响；具体影响是什么，如何影响。让我们来看看下面的例子:
Thefirstguitarswerewooden. ThisistheSpanishguitarandthestringsweremadefromanimalproducts. Thencamesteelstrings. Andthatledtothelapguitar,whichisalsocalledthesteelguitarbecausetheplayerslidesasteelrodupanddowntheneck. Andthoseareallacousticguitars. OK?
Buttheneventuallywehaveelectric guitars. Overtheyears,manyinventorsandmusicianscontributedtothedesignoftheseinstruments. Andeachdesignwasintendedtoalterthesoundinsomeway,atfirstatleastwiththeelectric guitar,tomakeitlouder.
很明显，教授下面就开始讲吉他的发展过程，种吉他，wooden aka spanish guitar;然后stel guitar;lap guitar;然后是electric guitar。并强调“许多发明者和音乐家为这种乐器的设计做出了贡献，每次修改的目的是改变电吉他的声音，即元素中提到的对话题的影响。
历史主题核心要素三：时间主题核心要素三：
历史话题的第三个核心要素是时间。当然，你可能会注意到，下面例子中提到的具体时间点似乎只有两个1890年代还有1920年代。但总的来说，历史文章的时间顺序是一件非常关键的事情，因为说到某件事的发展，我们总是从前到后说。我们提醒大家，时间本身并不重要，只要我们知道谁在前面，谁在后面。
Solet'sgetbacktowhenthesteelguitarwasfirstintroducedintheUnitedStates. ItwasrightaftertheSpanish-Amerinthel1890ss. USsailorswhowerestationedinHawaii—then a US territory—wereveryenamoredwiththemusictheyheardthere. Uh,HawaiianmusicwasbasedonthesteelguitarIjustdescribed. SomesailorslearnedhowtoplaythesteelguitarandbroughtithometotheStates. Beforelong,HawaiiansteelguitarmusicwasalltherageinthemainlandUS. Itactuallyhadastronginfluenceonthedevelopmentofseveralmusicalgenres,rock‘n'rollmostnotably,butalsojazzandblues.
Anyway,bythe1920s，withtheadventofthepublicdancemovement,peopleweregatheringinlargegroupstolistentosteelguitarmusic. Buttheyhadtroublehearingit,especiallyinlargepublicsettings. AsImentioned,theinstrumentwasplayedhorizontally,onthelap. Sincethestringsfacedupward,thesoundwasprojectedtowardtheceilingratherthanoutwardtowardthea
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