2017年4月1日托福阅读真题答案及解析

　　下面的内容就是2017年4月1日及解析，包括对文章话题的分类、题目回顾、文章段落的解析以及重点词汇的整理。这些文章话题之前可能也出现过，所以大家平时备考要注意总结。

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　　Passage one

　　话题分类：生物类

　　题目：Increasing Jellyfish Population

　　本文共6段。

　　第1段：Whether we should worry about the increasing jellyfish population or not. On the one hand, prey population increases and water temperature changes; on the other hand, it occurs in many places. Then take Japan as example, whose jellyfish population drifted to the sea has risen up to 500 million each day。

　　第2段：指出导致jelly fish population增加的因素，其一是人们对seafood 的喜爱导致overfishing ,使得predator的数置减少。

　　第3段：指出另一个因素是jellyfish's thrive features: Global warming and acidification。

　　第4段：海水富营养化。

　　第5段：other aquatic life forms cannot exist,但是jellyfish有几个特征使得其能生存：good survival rates, rapid reproduce and low oxygen level。

　　第6段：Benefits from globalization。

　　词汇题：

　　1. unprecedented = never seen before

　　2. permanent = constant

　　3. excessive= too many

　　4. inadvertently = accidentally

　　本文是2017年4月1日托福阅读真题答案及解析。

　　Passage two

　　话题分类：社会类

　　題目: The Importance of Mail Service in the Early United States

　　本文共四段。

　　第1段：America formation promotes circulation of news and information, both velocity and volume, people trades with one another in distance。

　　第2段：The United States Post Office makes news circulation easy and free。随后介绍了two decisions that help postal system to improve integrate nation: one is post office is granted to sell all the newspapers at low price, another is Congress never turning down any petition for new road or new post service.

　　第3段：提出虽然post service由political purpose决定，但是它也影响了 business ,举了 wheat 的例子。

　　第4段：transportation improvements, new built roads提高了mail service的capacity and speed up service, too。随着交通的发展，越来越多的方式 can deliver mails : sailing ship, stagecoach, steamboat, canal boat and railroad。

　　词汇题：

　　1. explicit = clear stated

　　2. integration = unit

　　3. suspicion = distrust

　　Passage three

　　话题分类: 农业类

　　題目: The Green Revolution

　　第1段：The green revolution can date as far back to 1930s。农业科学家做实验以 manipulate the seed of crops to improve productivity。随后指出科学家把中国大米和印度大米作为parents研究出IR8，优点是bigger head of grain and stronger stem。虽然IR8提高了产量，但是科学家仍然不满足,于是研究出了IR36,优点是：来自13个parents (母本)，可以抵抗15种 pests,110 days of growing period and three crops each year。

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　　第2段：global hunger makes the green revolution extraordinary。India can be self-sufficient in crop production and Asia increases the crop production.

　　第3段：非洲的地理环境使得其受益较小，故科学家研发出新的super rice, which can be transplanted that depended on seeding directly instead of seedling。

　　第4段：指出 the green revolution 有很多detractors ,比如 chemical fertilizers and pesticides can reduce the organic matter in the soil, and many small-scale farmers lack of financial resource to purchase genetic enhanced seeds。

　　词汇题：

　　1. experimenting with = trying to

　　2. drastic= extreme

　　3. acquired = obtained

　　Passage four

　　话题分类: 生物类

　　题目: The Origin And Rise of Modern Birds

　　第1段：指出 all bird groups are classified as Neornithes, 科学家使用K-T extinction 作为新旧鸟类的dividing line。

　　第2段：传统认为modern birds起源于cenozoic。

　　第3段指出有新的研究利用molecule time estimation得出modern birds实际上起源于Cretaceous。

　　第4段：指出尽管 molecule time estimation是根源于gene sequence，但是不能解释导致mass extinction产生的evolution process。

　　词汇题：

　　1. vacated = emptied

　　2. counterpart=equivalent

　　3. compelling = convincing

　　4. essential = principal

　　以上的内容是2017年4月1日托福阅读真题答案及解析，希望对你们有更多帮助和指导!