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。
Water.Earth has loads of H2O.
But did it always?
This question has plagued scientists for decades.
Conventional wisdom has it that the Earth formed without any water.
Then meteorites carrying water smashed into the planet, dumping their precious cargo.
But now, a team of geologists has challenged this idea.
They say water may have been here from the start.
The scientists discovered that the chemical signature of water on Earth matches the signature of water in an ancient group of asteroids called eucrites.
These bodies formed just a few million years after the birth of the solar system.
And because Earth and eucrites seem to share the same source of water, the reasoning goes, Earth must have gotten its water around the same time the eucrites did—which has big implications.
“Because Earth got its water early—really the whole inner solar system got its water early—it means that planets, once they fully formed and got cool enough that water would be stable on the surface, they could be habitable.”
The Woods Hole Oceanographic Institution’s Adam Sarafian, who led the research.
“It wasn’t like these planets are just waiting around, looking at their watches, saying,Where’s the water?
Life’s ready to go, we just need water here.
So it pushes the date at which planets can become habitable back.
And we need to go back to the drawing board on how planets are built and how water survives large impacts.”
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