PTE阅读细节题中对比逻辑技巧讲解

　　在PTE阅读细节题中除了考察时间点以外，在题目题干出现考察对比逻辑的时候，我们同样是要注意的。比如细节题中考察对比逻辑，我们就要先读清楚题干中到底是要问什么。

　　举个例子

　　【Paragraph 2】

　　Earth’s earliest atmosphere contained several gases: hydrogen, water vapor, ammonia, nitrogen, methane, and carbon dioxide, but no oxygen. Gas mixtures emitted from present-day volcanoes resemble this early atmosphere, suggesting its origin from volcanic eruptions. In Earth’s earliest atmosphere, methane and carbon dioxide occurred at much higher levels than at present—a circumstance that was favorable for early life. Methane and carbon dioxide are greenhouse gases that warm atmospheres by retarding loss of heat to space. These two gases kept Earth warm during the Sun’s early history, when the Sun did not burn as brightly as it now does. (An early dim period, with later brightening, is normal for stars of our Sun’s type.)

　　【Paragraph 3】

　　Earth’s modern atmosphere, which is 78 percent nitrogen gas, 21 percent oxygen, and about 1 percent argon, water vapor, ozone, and carbon dioxide, differs dramatically from the earliest atmosphere just described. The modern atmosphere supports many forms of complex life that would not have been able to exist in Earth’s first atmosphere because the oxygen level was too low. Also, if atmospheric methane and carbon dioxide were as abundant now as they were in Earth’s earliest atmosphere, the planet’s temperature would likely be too hot for most species living today. How and when did the atmosphere change?

　　8. According to paragraph 2 and 3, which of the following is one way in which Earth’s early atmospheredifferedfromitscurrentatmosphere?

　　A.It had fewer greenhousegases.

　　B.It waswarmer.

　　C.It had lower levels of carbondioxide.

　　D.It did not containmethane.

　　解题步骤

　　读题，我们看到这是一道普通的细节题。

　　题目当中问道：以下哪一个是地球早期大气与目前大气不同的方面？虽然看似问的是地球早期大气与目前大气的不同，但是实际上，这道题是要我们选择的是一个属于地球早期大气特点的选项。

　　因为该题干中inwhich从句的主语是earlyatmosphere，早期大气做主语，由此可以判断问的是早期大气的特点，因此在选答案的时候，一定要选择一个与早期大气特点相符的选项。

　　如果不仔细读清楚，就容易当作是问早期大气和目前大气的不同点。

　　那么这个时候，从第二段和第三段中，我们会读到早期大气和目前大气存在的对比情况是：早期大气有更多的温室气体Methane and carbon dioxide，这两种气体会为地球保暖，而目前大气则没有那么多的温室气体，carbondioxide是更少的，光读到这三点就已经是ABC 三个选项的内容，那就不知道该如何进行选择了。

　　如果读懂了问题要问的对象，那这道题就迎刃而解了，符合早期大气特点的，是B选项，从而选出正确答案B。

　　所以，读懂题目问什么，是为了便于我们清楚判断答案选项的，避开陷阱。

        以上就是小编为大家整理的关于PTE阅读细节题高分技巧讲解，希望对大家有所帮助。更多PTE考试时间、PTE成绩有效期等问题可以咨询我们。