英语作文 至少80字
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last friday , we had an lesson and it was really unforgettable because it was the last lesson given by our kind english teacher ,mr tang. when mr tang slowly went into the classroom ,we could see clearly that it was hard for him to leave us though he had taught us for only three months.he said something about him future plan ,which moved us all deeply.then he started the last lesson. we all listened attentively(认真地) to every word he said .if only we had done like this before!(如果我们以前就这样该多好啊)the naughty boys unusually behaved well in this last lesson. it was obvious(明显的)that all of us had the common feeling that we wouldn't let him go. though we didn't want our good teacher to go ,it seemed to be too late . as the saying goes,"only when we lose something do we realize the value of it."(这句你应该能理解) at last,with the bell ringing,mr tang looked at us all soulfully(深情地) and expressed what he thought. he hoped that we would make progress in our study and become good citizens(公民) in society. what an unforgettable lesson!
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Haze is air pollution in which is mixed up with dust, smoke and other dry particles ,and it obscure the clarity of the sky and interacts with the natural environment.This kind of air pollutant come from a variety of natural and manmade sources. Natural sources can include windblown dust, and soot from wildfires. Manmade sources can include motor vehicles, and industrial fuel burning, and manufacturing operations. The one of the main cause that touches off haze is manufacturing operations. Many factories were over measure produced the smog that had over the standard and the smog seriously influence the air become air pollution.The components that make up haze may have negative effect on people's health especially that of the children and the elderly. Also not excluded are those who have certain diseases such as asthma, allergy, and pneumonia and lung disease. Workers working in the open air have a high risk in their health.One of effective solutions to help eliminate haze is to make some chemistry changes during the manufacturing process,so it could reduce harmful emissions which are produced by manufacturing operations
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。。。为什么不自己写,。。。
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