:2018年中考英语试题分类汇编第二期--阅读理解（人物或故事类、科普或环境保护类或健康类、社会现象或历史文化教育类）有解析

专题08 阅读理解（人物或故事类、科普或环境保护类或健康类、社会现象或历史文化教育类）
1.【2018年山东省青岛市】
 
Some scientists say that animals in the ocean are
increasingly threatened(威胁) by noise pollution caused by
human beings. The noise that influences sea animals comes
from a number of human activities. It is caused mainly by
industrial underwater explosions(爆炸) , ocean drilling, and
ship engines. Such noises are added to natural sounds.
These sounds include the breaking of ice fields, underwater
earthquakes, and sounds made by animals themselves.
Decibels (分贝) measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibel level of one hundred and ninety five would have the same effect（效果）.
Some scientists have proposed setting a noise limit （限度）of one hundred and twenty decibels in oceans. They have observed that noises at that level can frighten and confuse whales（鲸鱼）.
A team of Americ