说到托福阅读备考，大家首先想到的肯定是OG和TPO。作为托福必不可少的备考神器，通过TPO练习来更好的适应考试的节奏。本文对TPO18 Lightning这篇文章的题材和部分题目进行了简单的分析，希望能够给正在备考托福阅读的大家带来一些参考的作用。
TPO18 Lightning
文章题材：自然学科——闪电
常见词汇：
occupied adj. 已占用的;使用中的;无空闲的 v. 占有
release [ri'li:s] n. 释放，让渡，发行vt. 释放，让与
channel ['tʃænl] n. 通道，频道，(消息)渠道，海峡，方法
acquire [ə'kwaiə] vt. 获得，取得，学到
investigate [in'vestigeit] v. 调查，研究
layer ['leiə] n. 层vi. 分层
lightning ['laitniŋ] n. 闪电adj. 闪电般的，快速的
minor ['mainə] adj. 较小的，较少的，次要的n. 未成年
occurrence [ə'kʌrəns] n. 发生，事件，发现
except [ik'sept] vt. 除，除外
易错题解析：
Paragraph 3: Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
3.The author remarks that “Lightning that strikes the ground is the most likely to be destructive” in order to explain why
Othis form of lightning has been investigated so much
Othis form of lightning is not as common as lightning within a cloud
Oscientific understanding of this form of lightning is important
Othe buildup of positive charge on the ground beneath a storm cloud can have serious consequences
题型：修辞目的题。答案是(A)
解析：需要根据上下文的逻辑关系确定答案。先去原文中锁定“lightening...”这句话，看完整句。发现它所在的句子本身就是因果关系复句，前半句的内容是为了来解释“so”引导的后半句，而在后半句中，even though引导让步状语从句，句子意思主要集中在主句“it has received a lot of scientific attention”上。所以答案就是这个复合句中的“so...”这句，选项A是对于这句话的同意转述，所以A是正确选项。
易错选项：(B)。
Paragraph 5: The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Which of the following claims about lightning strikes can be inferred from paragraph 5?
ODuring a lightning strike the diameter of the channel the electrons follow is considerably enlarged beyond a few centimeters.
OA building is unlikely to be hit by lightning unless it is at least 100 meters tall.
OA building is hit by a lightning strike because the building itself has first determined the path the lightening then takes to it.
OThe light of a lightning strike first appears at the point where the streams of negative and positive particles meet.
题型：推理题。答案是(C)
解析：关键词：lightning strikes，定位原文“The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure”.这句话中提到positive particles是来自于地面带有顶尖的建筑物，和云层的负粒子形成一个通道，形成闪电。所以闪电就会顺着这个通道到达建筑物。而C选项就是从这句话的论述而得出的结论，也就是说因为建筑物本身会决定闪电的路线(对应原文中来自顶尖建筑上的正电粒子和来自云层的负电粒子会形成一个channel)然后就会被闪电攻击(闪电就会沿着这个channel运动，就会袭击这个channel上的物体，而建筑物就在这个channel上。)
A项和D项是原文未提及的内容，B项信息错误。
以上就是小编带来的托福阅读浅析之TPO18 Lightning,希望能够帮助大家进行备考。更多托福考试资讯请关注前程百利。
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