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Ngocmo123
2 năm trước
Miệng giếng nước là một hình tròn có bán kính 0,6m. Người ta xây thành giếng rộng 0,4m bao quanh miệng giếng. Tính diện tích của thành giếng đó. Hãy giúp câu hỏi này (câu hỏi lần cuối cùng hôm nay)
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ENVIRONMENTAL Pollution In recent years the problem of environmental pollution has become a serious problem in big cities in ourcountry. So, what are reasons and possible measures for this problem? Nowadays, we are living in a city with high population density, so domestic waste is the first reason.Then many people's social consciousness is not high. In several areas, they throw rubbish on streets, canalsand rivers. It is easy for us to see rubbish of all kinds floating on the water. Moreover, uncultured peopleeven pee in the public place. Now, let's come to other reasons. Our city is overloaded with vehicles that expel a lot of smoke and dust.This contributes to the heat of the air, and causes pollution. Besides that, in several places, trees have been cut down to have room for buildings, hotels, orsupermarkets. This makes the atmosphere in our city mug and stuffy. New words: muggy (adi) nồm ẩm, oi bức stuffy (adi) ngột ngạt 1. What is not the reasons of environmental pollution? A. high population density B. smoke and dust from vehicles C. domestic waste D. the new drainage system 2. What is the first reason of environmental pollution? A. domestic waste B. smoke and dust from vehicles C. population density D. rubbish on streets 3. What is the synonym of the word "consciousness" A. awareness B. unculture C. unconsciousness D. awakeness 4. Why vehicles cause air pollution? A. Vehicles make the atmosphere in our city muggy and stuffy. B. Because they expel a lot of smoke and dust. C. Because they consume too much gasoline. D. Because many people use motorbikes and cars nowadays. 5. How is the drain system in our city? A. It’s very modern. B. It's downgrade. C. It is new. D. It is very old and downgrade

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