每日一词-名词（acid rain 酸雨）acid rain 酸雨 含有高浓度硫酸和硝酸的降水。这个名词，通常也用于含有酸性的雪、冻雨和雹。这种降水在北美和欧洲的许多地区已成为日益严重的环境问题，尤其在大都市、工业区及其周围，还可能扩散到很远的距离。酸雨形成的过程，一般是从二氧化硫和氮的氧化物进入大气开始。这些气体是...
What is Acid Rain?
根据第二段最后两句 Normal rainwater has a PH of 5. 6. When the PH level of rainwater goes below 5. 6, it is considered acid rain.可知, 正常的雨水PH 值为 5.6,当雨水的PH值低于5.6时,我们称 之酸雨。 4.主旨大意题。 本文主要讲了酸雨的定 义。 【答案】 1.A; 2.D; 3.C; 4.A. ...
Acid rain, which is a form of’ air pollution, currently becomes a subject of great debate because of widespread environmental damage for which it has been blamed. It forms when oxides of sulfur and nitrogen combine with atmospheric moisture to yield sulfuric and nitric acids, which may then ...
3.1.2 Effects of Acid Rain on Plants and Trees 在酸雨影响的地区,死树或垂死的树木是常见的景象。酸雨从土壤中浸出铝。铝可能对植物和动物有害。酸雨还从树木生长所需的土壤中清除了矿物质和营养。 在高海拔地区,酸性雾和云可能会剥夺树木叶子中的养分,使它们留下褐色或枯死的叶子和针叶。这样,树木吸收太阳...
What we know about acid rainNo Abstract available for this article.doi:10.1038/307087a0MellanbyKennethNature Publishing Group UKNature
Acid rain: What cost, what benefit?No Abstract available for this article.doi:10.1038/306633b0Beardsley, TimNature Publishing Group UKNature
If we are travelling a long distance, take a bus or train to save fuel.As research shows, acid rain harms our environment.But people everywhere can take small steps now to help protect our environment for future generations.11、12题完成句子;13题简略回答问题;14题找出并写下第三段的主题句;...
JB: This is Earth and Sky with a question from Sandra Renee of Olive Hill, Kentucky. She asks, "How do you know when it rains that it's not acid rain, and what exactly is acid rain?" DB: Sandra, you need a pH meter to reliably measure the acidity ...
All fresh water shrimp will die when the water has a Ph of 6.0. Aquatic plants will grow the best when the water has a Ph between 7.0 and 9.2. If the acid rain problem gets worse, all of the sea life will eventually be gone. 1. Acid rain . 2. Which of the following can die ...