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，练习记笔记技巧和复述。废话少说，下面开始：
60秒科学：Heroin Has Expanded Its User Base
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。
In the last half century, heroin contributed to thousands of deaths, from Janis Joplin to Philip Seymour Hoffman to legions of people now remembered only by their friends and families.
But compared with 50 years ago, the drug’s consumers look strikingly different now. Back then, a typical user was often an inner-city minority male whose first drug experience was with heroin, at about the age of 17. Today’s users are mostly non-urban white men and women in their late twenties whose gateway drug was a prescription opioid.
The findings come from surveys of some 2,800 heroin users who self-reported demographic information and other data when they entered treatment centers. The results are in the journal JAMA Psychiatry. [Theodore J.Cicero et al, The Changing Face of Heroin Use in the United States: A Retrospective Analysis of the Past 50 Years]
Up until 1980, whites and nonwhite sought treatment in equal numbers. But in the last decade, nearly 90 percent of treatment center patients were white.
Recent users said that heroin became their drug of choice because it was both cheaper and easier to get than prescription drugs. Half of today’s users said that if they could they’d prefer prescription drugs because those opioids are °∞cleaner.°±
The researchers note that their study is limited because it includes only users who sought treatment. But the data seem to confirm the growing suspicion that heroin has left the city and is now comfortably ensconced in the suburbs.
-Dina Fine Maron
