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TPO托福口语生物类话题+范文

2014-10-21 15:05| 来源:环球托福

摘要: 在TPO的题目中,最具有代表性的生物类话题分布在TPO 4, TPO 10, TPO 15, TPO 17, TPO18和TPO 26, 它们分别研究的是恒温动物,海獭,蟾蜍,鸟类,某种常青树的濒危灭绝和某类淡水鱼的入侵。
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下面是环球教育老师为考生整理的TPO托福口语生物类话题+范文,希望对考生能够有所帮助。
在TPO的题目中,最具有代表性的生物类话题分布在TPO 4, TPO 10, TPO 15, TPO 17, TPO18和TPO 26, 它们分别研究的是恒温动物,海獭,蟾蜍,鸟类,某种常青树的濒危灭绝和某类淡水鱼的入侵。从研究的内容来看,考生们觉得它们之间绝无内容的相似性,更无从谈及什么相关性,但事实上并非如此。

——TPO 4:阅读和听力争论的焦点是恐龙是不是恒温动物,基于三个方面:climate change, leg position and movement and Haversian canals

——TPO10: 这篇谈及的是:whether does the number of sea otters decline attributes to the pollution, their predators and survival location

——TPO15: 讨论的是来自北美的cane toads本来到了澳洲是消灭那里的害虫的,但是入侵之后带来了许多害处,人们想了诸多方法减少它们:包括设置篱笆,志愿者参与和病毒侵害。

——TPO 17: 辩驳了某种鸟数量下降的原因(人类的增长,频繁的农业活动和大量杀虫剂的使用)。

——TPO 18: 为了挽救某种常青树,人们实施了很多措施:选择适合它生活的环境;迁移到别处(其实这里就有物种入侵的意思了)或在研究中心这个所谓的“温室”环境里成长。

——TPO 26: 介绍某种淡水鱼是否难以阻挡其入侵到别处,及其将会带来的潜在威胁。


生物类tpo口语范文:
 

In the aspects of adaptation, economic lucrativeness, and environmental value, genetically modified trees never have overwhelming advantage over natural trees. 

First, genetic modification doesn’t necessarily make a natural tree more resistant to environmental adversities. Although genetic reconstructing may make a species stronger in a specific condition as the reading indicates, the new strain lakes the genetic diversity of a natural species. Thanks to the marginal differences between individuals, there can always be some survivors among natural species following a large interruption like climate change or pest invasion. But similar changes may cause the distinction of a genetically modified species for their unification in characteristics.

 

Second, tree farmers don’t get guaranteed economic benefits if they plant genetically new strains. Companies that develop the new plants always charge farmers higher prices for artificially improved seeds, and receive money from farmers each time they grow the same plant. Such company policies and law will deprive farmers of the gaining mentioned in the reading.

 

Third, genetically modified trees don’t promise to protect wild trees. Actually, since they can grow faster with fewer resources, they are more ecologically invasive. Normally they outcompete natural trees by grasping natural resources like sunshine, water and soil. It’s far from the idealistic situation described in the reading.