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。悉尼文波雅思PTE培训学校专门为澳洲，尤其是悉尼、墨尔本的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：
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。
This is Scientific American — 60-Second Science. I’m Erika Beras.
Got a minute?
The last few years have seen numerous widely publicized incidents of civilians, black men in particular, being killed by police. In response, many officers are now required to wear body cameras. The theory is that technology will lessen the likelihood of an officer using unnecessary force to diffuse a situation. Now research finds that body cameras do indeed appear to keep encounters between police and civilians from intensifying to the point where a civilian files a complaint–in a few jurisdictions, anyway.
The study is in the journal Criminal Justice and Behavior.
Researchers collected data from seven police departments in the U.K. and the U.S. that serve a total population of two million people. The data represented over 1.4 million hours logged by nearly 2,000 police officers in 2014 and 2015.
Officers were randomly assigned to either wear or not wear body cameras week by week. When the police wore the cameras they were required to have them on at all times.
The year before the study, a total of 1,539 complaints were filed against officers at the seven sites. But during the course of the body camera experiment, a total of just 113 complaints were filed—a reduction of 93 percent. Six of the seven sites saw complaint reductions of at least 88 percent.
An interesting finding was that complaints against officers wearing body cameras were almost equal to complaints against those who were not wearing the cameras. The study’s authors suggest that the change in police behavior from wearing the camera continued even after the camera was removed. This effect is called “contagious accountability”: all officers became more conscious of their actions—camera or no camera.
Thanks for the minute for Scientific American — 60-Second Science Science. I’m Erika Beras.
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