PTE听力口语练习-科学60秒-Sweet Pest Control

PTE考生目前最大的问题之一就是练习题缺乏。除了有限的基本官方书(PLUS,Testbuilder, OG)之外,就没有题了。很多英语基础不是很扎实的同学很难找到练习材料。墨尔本文波雅思PTE培训学校专门为墨尔本,悉尼PTE考生准备了适合PTE听力阅读练习的科学60秒。各位PTE同学可以练习PTE听力中的summarise spoken text和PTE口语中的retell lecture,PTE听力口语-科学60秒-Frosty Moss练习记笔记技巧和复述。废话少说,下面开始:


Kid Scientist Finds Sweet Pest Control

听力内容:

60秒科学节目(SSS)是科学美国人网站的一套广播栏目,英文名称:Scientific American – 60 Second Science,节目内容以科学报道为主,节目仅一分钟的时间,主要对当今的科学技术新发展作以简明、通俗的介绍,对于科学的发展如何影响人们的生活环境、健康状况及科学技术,提供了大量简明易懂的阐释。

You can catch more flies with honey than with vinegar. But if you want to kill them, you might try Truvia. Because a new study shows that the active ingredient in this popular sweetener can act as an insecticide.

The study began as a sixth-grade science-fair project. Eleven-year-old Simon Kaschock-Marenda noticed that his parents had stopped using sugar. So he decided to see how different sweeteners affect the health of fruit flies. He and his dad, a card-carrying biologist, offered the flies food spiked with a variety of no-cal sweeteners. Six days into the experiment all the Truvia-fed flies were dead, while those stuck with Sweet-n-low, Splenda or Equal lived five to seven weeks.

Why Truvia makes flies drop like flies is still a mystery. Back in the lab, the researchers confirmed that the bugs weren’t starving: they all continued to eat. Most actually seemed to prefer Truvia to real sugar when offered a choice, findings published in the journal PLOS One. [Kaitlin M. Baudier et al, Erythritol, a Non-Nutritive Sugar Alcohol Sweetener and the Main Component of Truvia®, Is a Palatable Ingested Insecticide]

Next, the researchers will see if the sweetener kills other bugs, like cockroaches or ants. Until then, try tossing a little Truvia in your coffee, and on the counter.

–Karen Hopkin

 

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