南宁环球教育托福考试真题解析汇总

来源：南宁环球雅思培训学校时间：2020/12/30 11:30:54

　　关于托福与真实考试的高度匹配度，我们来以本套题目的一道题为例来感受一下：
　　It is thought that the facial pits or pit organs on the head of some snakes are specialized infrared(heat)receptors.When a rattlesnake strikes,the direction of the strike seems to be guided by the infrared radiation from its prey.A rattlesnake strikes only at warm-blooded prey,and when the prey is dead and at room temperature,the snake will not strike.However,a blindfolded snake strikes correctly at a dead rat that is pulled across the cage,provided the rat is warmer than the surroundings.Blindfolded,the snake cannot be guided by vision;nor is it guided by the sense of smell,for it will strike correctly even at a moving,cloth-wrapped electric bulb.The pit organs are evidently involved in sensing the location of warm objects.All snakes that have pit organs feed preferentially on warm-blooded prey,and this further supports the view that these organs are infrared sensors.In the rattlesnake the pit organs are located,one on each side,between the nostril and the eye:they are connected to many nerves,and this in itself suggests a sensory role for the organ.
　　2.Why does the author mention a"cloth-wrapped electric bulb"in the passage?
　　A.To illustrate the size of prey usually attacked by snakes.
　　B.To prove that blindfolded snakes will strike more often at a dead rat than an electric bulb.
　　C.To eliminate the possibility that snakes locate prey by using a sense of smell.
　　D.To explain how scientists were able to trick blindfolded snakes.
　　这道题是一道典型的目的题。目的题的特征是“声东击西”。题目并非提问阴影部分内容的理解，而是考察我们对其结构方面作用的掌握。本题提问部分出现在这样一个句子当中“Blindfolded,the snake cannot be guided by vision;nor is it guided by the sense of smell,for it will strike correctly even at a moving,cloth-wrapped electric bulb.”可以看到cloth-wrapped electric bulb内容本身是与本篇主题，蛇的pit organ是无关的。从连接词for可以看出，这个部分是作为原因去支持前方的观点“nor is it guided by the sense of smell”。因此本题的答案就是C选项。
　　所以我们通过托福题目的练习，可以为我们的托福备考打下坚实的基础。一方面可以让我们熟悉题型，扩大词汇量，另一方面也可以让同学们积累一些常见的背景知识

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