XIN GIÚP MÌNH GIẢI NHỮNG CÂU NÀY VỚI Ạ XIN CẢM MƠN Ạ.

giải hệ pt x + y + z=0 , 8^x + 8^y +8 ^z = 2^x + 2^y + 2^z

Mỗi vòi A,B khi mở chảy nước vào bể với lưu lượng đều .Nếu vòi A chảy 3 giờ , vòi B chảy 4giờ thì nước trong bể là 57 l .Nếu vòi A chảy 4 giờ , vòi B chảy 3 giờ thì nước trong bể là 55l .Vậy nếu 2 vòi cùng chảy 1 lúc thì mất bao lâu để đầy bể ,biết rằng dung tích bể là 320 l

Ex 4: Write a sentence with “if” for each situation. Use the conditional sentences type 1 1. You drive fast. You have an accident. …………………………………………………………………………………………….. 2. He doesn’t stop smoking. He dies of lung cancer. …………………………………………………………………………………………….. 3. She stays at home. I give her a bar of chocolates. …………………………………………………………………………………………….. 4. Your English is good. They accept you. …………………………………………………………………………………………….. 5. They don’t open the door. The room is very dark. …………………………………………………………………………………………….. 6. You don’t spend too much on shopping. You save a lot of money. …………………………………………………………………………………………….. 7. We pollute the river. We don’t have water to use. …………………………………………………………………………………………….. 8. I show you how to write a book. You try to study. …………………………………………………………………………………………….. 9. She doesn’t hurry. She is late for school. …………………………………………………………………………………………….. 10. You don’t take the medicine. Your health is worse. …………………………………………………………………………………………….. Ex 5: Choose the word or phrase A, B, C or D that best fits the blank space in the following passage Light pollution is not (1) ….. serious as water or air pollution. (2) ….., it is the type of pollution that (3) ….. more in cities than in rural areas. In the past, we could sit out at night and (4) ….. at glittering stars in the sky and light from objects in the outer space. Nowadays, cities are covered with lights from buildings, streets, advertising displays, many of which direct the lights up into the sky and into many unwanted places. The real problem is that it is very (5) ….. to apply light to almost everything at night. Millions of tons of oil and coal (6) ….. to produce the power to light the sky. Eye strain, (7) ….. of vision and stress are what people may get from light pollution. (8) ….. light at night can harm our eyes and also harm the hormones that help us to see things properly. 1. A. more B. as C. much D. only 2. A. Moreovern B. However C. Therefore D. Nevertheless 3. A. happen B. occur C. occurs D. is occurred 4. A. watch B. see C. spend D. gaze 5. A. waste B. wastes C. wasting D. wasteful 6. A. used B. using C. is used D. are used 7. A. lose B. lost C. loss D. losing 8. A. Very much B. Too much C. Too many D. So many Ex 6: Write the second sentence so that it means the same as the first one 1. The rising temperature in the water destroys ecosystems. (so) → The temperature ………………………………………………………………………… 2. Water pollution causes flooding due to the accumulation of solid waste and soil erosion in rivers. (because of) → Water pollution …………………………………………………………………………. 3. Oil spills in the water causes animals to die. (make) → Oil spills ………………………………………………………………………………… 4. Dumping solid wastes in rivers, lakes and oceans causes water pollution. (lead to) → Dumping solid wastes …………………………………………………………………… 5. Global warning makes water temperature go up. (due to) → Water temperature ………………………………………………………………………. 6. Oil from ship travel causes oil pollution to happen. (because of) → Oil pollution …………………………………………………………………………….. 7. We don’t use more oil and coal. Pollution doesn’t increase. (If) → If we ……………………………………………………………………………………... 8. The climate doesn’t change. We don’t meet with natural disasters. (If) → If the climate …………………………………………………………………………….. Ex 7: Give the correct form of the words in brackets 1. Are all types of pollution ……………… to the health of humans and animals? (harm) 2. The ……………… are concerned about the oil spills in East Sea. (environment) 3. Dumping ……………… waste into the lakes and rivers has caused serious water pollution. (industry) 4. Many people in this area have cholera because they drink ……… waste. (treat) 5. Examples of primary ……………… are exhaust fumes from cars, soot from smoke and ash from volcanic eruption. (pollute) 6. If we use water ………………, more people will have fresh water. (care) 7. The polluted water results in the ……………… of many aquatic animals and plants. (die) 8. Too much carbon dioxide in the atmosphere causes global ………….. (warm)

câu nào dưới đây sai: A.tâp hợp các kí tự cùng nằm trên môt đường ngang từ lề trái sang lề phải là một dòng. B.dòng chỉ có thể chứa các từ của một câu C.phần văn bản nhìn thấy được trên màn hình là một trang màn hình D.phần văn bản trên một trang in gọi là trang văn bản

Giúp em vơi anh chi em cam ơn em cho5 sao được không

11 Choose the best answer A, B, C or D to complete the sentence. Question 8: I ___ my English exercises before I went out. A:did B:was doing C:do D:had done 18 Choose the best answer A, B, C or D to complete the sentence. Question 9: A heavy storm swept through the village and many people ______. A.are killed B:were killed C:kill D:killed 19 Choose the best answer A, B, C or D to complete the sentence. Question 10: He fell off the tree and _____. A:was badly injured B:was bad injured C:was injured himself badly D:badly injured

Đọc đoạn văn sau và thực hiện các yêu cầu bên dưới

Cách ban giúp mk làm bài 1-2-3-4-5 với ạ

Trong các phản ứng hóa học Cacbon thể hiện vai trò là chất gì? Trong hợp chất thể hiện những hóa trị nào?