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：
Cold-Comfortable Mice Point to New Analgesics
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。
Sick of feeling chilly? Well, there may be a solution. Because researchers have generated genetically engineered mice that can’t feel the cold. Their work is in the Journal of Neuroscience. [Wendy M. Knowlon et al., A Sensory-Labeled Line for Cold: TRPM8-Expressing Sensory Neurons Define the Cellular Basis for Cold, Cold Pain, and Cooling-Mediated Analgesia]
All mammals, us included, sense temperature and touch through nerve cells in the skin. On these nerve cells are different types of receptors that respond either to mechanical pressure in the case of touch, or to heat or cold.
Researchers were able to stop the production of the receptors for cold in the mice, while leaving the receptors for the other sensations intact. They put the cold-insensitive and normal mice in a box where the temperature of the floor ranged from a freezing 32 degrees Fahrenheit to a toasty 122. And they found that the normal mice avoided both extremes, while mice without cold receptors shied away from the hot plate but had no qualms about the chill.
Of course, the researchers were not trying to create comfy cold mice. The real intent was to see if it’s possible to stop just one skin sensation. The hope is to design drugs that can dull pain without leaving patients numb. And thus to provide not-cold comfort.
—Karen Hopkin
