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：
下面是墨尔本悉尼文波PTE雅思培训学校为大家整理的原文材料：
As scientists delve deeper beneath the ocean’s surface, they find bizarre creatures that have adapted to harsh and extreme environments. Now comes a new one—the discovery of the first multicellular animals that survive and reproduce entirely without oxygen. [Roberto Danovaro et al, BMC Biology, http://bit.ly/dcICgo]
Researchers had thought that only single–celled organisms such as prokaryotes and protozoa could live in the oxygen–deprived environments of the deepest ocean. When scientists did find multicellular organisms, they assumed that they’d sunk from oxygen–enriched waters.
But over the past decade, scientists in Italy and Denmark sent three expeditions to fetchsamples from sediment in what’s known as a deep hypersaline anoxic basin in theMediterranean. And in these sediments, from almost two miles below the ocean’s surface, theyfound three distinct species of a tiny multicellular animal phylum called Loricifera.
They don’t have mitochondria. Instead, they seem to have organelles that resemblehydrogenosomes—similar to mitochondria, but that use anaerobic chemistry. Scientists don’tyet fully understand the biochemistry—but the discovery opens the possibility of complex lifeforms on oxygen–free planets.
—Cynthia Graber
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