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 is well known, geckos sell car insurance.
But they’re also famous for their extremely adhesive feet, which can keep them stuck to walls and even ceilings.
Archimedes wondered how they do it.
Geckos can also easily loosen their grip and break into a dash, which has flummoxed physicists.
But scientific stick-to-itiveness finally found the on-off switch.
Geckos’ toes are covered in thousands of tiny hairs called setae.
These setae can bend to make contact with all the grooves and crevices in a surface.
To adhere, the setae rely on small electromagnetic attractions between molecules called van der Waals forces.
Researchers created mathematical models that revealed that the default for gecko feet is non-sticky.
To activate the grip, the lizards extend and angle their setae to create millions of contact points with a surface.
The research is in the Journal of Applied Physics.
Scientists would love to create synthetic adhesives based on the gecko trick.
Perhaps by harnessing the power of setae, robots could climb walls, and stick or unstick without expending much energy, just as the gecko does.
