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：
Winter Cholesterol Rise May Boost Heart Risk
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。
Cholesterol levels go up in winter even in sunny climes, perhaps due to less exercise and dietary changes. Christopher Intagliata reports
Winter is high time for heart attacks. And while snow shoveling can pose a danger to your heart, the winter heart attack trend holds true in places that never see snow.
So researchers in sunny Brazil investigated another cardio culprit: cholesterol. They tracked cholesterol levels in a quarter million people living outside Sao Paulo—mostly middle-aged men and women. And they found that levels of LDL, or bad cholesterol, shot up during the South American winter. The change pushed 18,000 people with borderline cholesterol levels over the threshold. The finding was presented at a recent meeting of the American College of Cardiology. [Filipe Azevedo Moura et al., Seasonal variation of lipid profile and prevalence of dyslipidemia: a large population study]
Why the wintertime spike? People tend to exercise less in winter, and to eat more fatty foods. We also get less vitamin D from sunlight—and studies suggest vitamin D may improve the ratio of good to bad cholesterol.
The biggest concern, the researchers say, is that one annual cholesterol check could over or underestimate your actual levels—and have an outsized influence on whether or not your doctor prescribes meds. The study doctors offer their own wintertime prescription: exercise, eat healthy and get more sun. Might keep you young at heart.
—Christopher Intagliata
