2011.12英语四级阅读：小小昆虫大大噪音

文章作者 100test 发表时间 2011:07:16 09:57:41
来源 100Test.Com百考试题网

　　2011.12英语四级考试阅读：小小昆虫大大噪音
　　这个夏天很呱噪，小小昆虫制造大大噪音。
　　That may not sound like much–but it’s the loudest animal in the world. For its size， that is. The insect called the water boatman is two millimeters long. can be heard from a stream bottom by the human ear.
　　Animals are generally constrained by the mechanics of size. But small creatures need to be heard as well. Researchers thought some freshwater species might rely on sound because of poor visibility. So they collected water boatmen from a stream and pond in France. They recorded 13 males doing their thing. They measured the sound level and the insects’ bodies. And they compared those figures with 227 other loud species， like elephants. And relative to its body， the little water boatman made the biggest racket， maxing out at 99 was published in the journal Public Library of Science One. ［Jér