为什么air pollution 是抽象名词?

为什么air pollution 是抽象名词? 为什么there is air polluttion,water pollution and land pollution.用的是is,而There are air and water on the Earth.用的是are? 是have the air polluted 还是 have the air pollution? air Pollution什么意思 the air pollution makes many people feel...英语选择题一道the air pollution makes many people feel___Abad Bsick为什么?谢谢 现在急着要,(有关于air pollution的)谁能告诉我为什么要探讨air pollution用英文回答,不用太长~ Factories,the growing number of people are the r----------- for air pollution today.答案是responsible.我写的是reasons,为什么不对? air pollution can also lead to lung cancer.为什么lead不能改成cause burning gas ,oil and coal creates air pollution为什么谓语动词用第三人称单数? sea ice ,air pollution两个词为什么不能看做普通名词构成的专有名词? in air 和 in the air 的区别是?There is a lot of pollution in the air.和There is a lot of pollution in air的区别是? We should try to stop the air pollution _____(live) a better life.是living吗? Factory-a leading cause of the air pollution翻译是‘工厂--造成空气污染的罪魁祸首’对吗? Air pollution is more serious than water pollution.的意思? 求一篇关于air pollution的文章 英语作文:Air pollution 80字 why air pollution is the most serious? Trees can help____(fight)air pollution.