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Nguyenthuyvan
2 năm trước
Dùng những dụng cụ chính xác, người ta đo được thể tích của cùng một lượng benzen (chất lỏng dễ cháy) ở những nhiệt độ khác nhau các bạn nói cả cách tính cho mình với nhé cảm ơn rất nhiều
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Giúp mk nha mọi người!!!Please!!! How are you? I am happy to share...(1)...you some good news about my village. There have been some changes since your visit last year. Last week I came back to my village...(2)...was really surprised. You know what? The lake is not polluted anymore. The factory has installed a new filtration system to treat the chemical waste. I saw lots of small fish in the lake and wild ducks swimming in the water. Besides, they have planted trees around the factory to...(3)...air pollution. Since some villagers are in the habit of littering, people have placed dustbins in various places. This has resulted in a much cleaner environment. My grandparents say that at weekends villagers also...(4)...around the village together to collect rubbish. 1. A. With B. to C. in D. at 2. A. But B. and C. or D. so 3. A. increase B. rise C. reduce D. fall 4. A. have gone B. going C. go D. to go

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