giúp mk nhé mn mk sẽ vote 5* kèm theo 1cảm ơn nhoaa làm tất cả hộ mk nhé sáng mai mk phải nộp rồi

Đưa một đầu thước nhựa dẹt lại gần một quả cầu nhựa xốp nhẹ được treo vào dưới một sợi chỉ mảnh thì quả cầu nhựa xốp bị đẩy ra xa. Có thê nói gì về hai vật này ?

Cho tam giác ABC đường cao AH.Từ H vẽ HM,HN lần lượt vuông góc với AB,AC a.chứng minh tứ giác AMHN là hình chữ nhật

Giúp e làm phần mở bài phần làm văn ảnh dưới ạ Em xin cảm ơn

Giải giúp mình bài 2 nha mn?thankyou very much

Biểu diễn mối quan hệ giữa các tập hợp số N, Z, Q, R.

giúp mk bài XII,, mk cần gấp cho 5 sao

viết một đoạn văn ngắn bằng tiếng anh nói về chủ đề" người mẹ có nên đi làm không?" giúp mình với

II. READING 1. Read the passage carefully the passage then check true (T) or false (F): Many people still believe that natural recources will never be used up. Actually, the world’s energy recources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnham of the New England Institue of Technology, we have to conserving coal, oil and gas before it is too late; and nuclear power is the only alternative. However, many people do not approve of using nuclear power because it’s very dangerous. What would happen if there was a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations. The most effective thing is that we should use natural recources as economical as possible. True or False ………... 1. Many people think that natural recources will never run out. ………... 2. We don’t know exactly how much fuel is left. ………... 3. According to Mr Burnham, there is no substitution for coal, gas and oil. ………... 4. All people agree to use nuclear power as an alternative energy. ………... 5. Natural recources should be used as economically as possible. 2. Read the passage carefully then answer the questions: SAVE THE EARTH People are all slowly destroying the earth. The seas and rivers are too dirty to swim in. There is too much smoke in the air that is unhealthy to live in many of the world’s cities. In big cities, poisonous gases from cars pollute air so much that traffic policemen have to wear oxygen masks. We have cut down so many trees and as a result, there are floods, droughts every year. Wild animals are in danger, too, because there is no environment for them. Some of them even disappeared. However, it is not only talking about the problem. We must save the world. This is an important duty nowadays. Questions: 1. Who are destroying the earth? >…………………………………………………………………………………………………………………………………………………………………….. 2. Are the seas and rivers clean enough to swim in? >…………………………………………………………………………………………………………………………………………………………………….. 3. Why are there floods and droughts? >……………………………………………………………………………………………………………………………………………………………………… 4. What must we do nowadays? >……………………………………………………………………………………………………………………………………………………………………… IV. WRITING 1. Rewrite the second sentence so that it has a similar meaning to the first sentence: 1. I think we should use solar energy to save our environment. I suggest………………………………………………………. 2. My friend failed his exam because of his laziness. My friend failed the exam because he………………………… 3. People have polluted the environment The environment……………………………………………... 4. Wild annimals are in danger because we destroy their environment. If we…………………………………………………………… 5. Ride your bike carefully or you will cause accident. If you

ca giup em giai bai toan mot voi