air pollution is threatening the health of people in urban areas(by)用preaent cotinuous passive

Air pollution is more serious than water pollution.的意思? why air pollution is the most serious? It is important to take indoor air pollution seriously. Air pollution is now a serious problem in China 英译汉 The air is filled with pollution同义句 Where is air pollution come from?和Where does air pollution comes from?的区别?Where is air pollution come from?和Where does air pollution come from的区别？ the pollution of SO2 is now the most dangerous problem of air pollution Air pollution is harmful to our health.(同义句转换) Air pollution ______ ______ to our health. air Pollution什么意思 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? 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? in,Sunshine town,there,air,less,pollution,is(?) 连词成句 there is little air pollution there than in other areas of Beijing.改错 How important It is to limit air and water pollution 句子有错吗 A great deal of smoke with c__ is sent into the air,causing much pollution there,air,a,of,is,lot,pollution.us,around连词成句 there is less air pollution than in the city改成同义句 air pollution is a problem in the city cfnter.怎么翻译