2014-2015学年第一学期高三年级学前考试英语 试 卷 i卷 第一节(共15小题；每小题2分，满分30分) 阅读下列短文，从每题所给的四个选项(a、b、c和d)中，选出最佳选项，并在答题卡上将该项涂黑。 a some scientists say that animals in the oceans are increasingly threatened by noise pollution caused by human beings. the noise that affects sea creatures comes from a number of human activities. it is caused mainly by industrial underwater explosions, 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 hav
