Viết Stp bé nhất từ các chữ số chẵn khác nhau mà phần tp có 3 chữ số 8 kon ở cuối

giải giúp mik bài 4 và bài 5 với

Cho tam giác ABC có AB = 16,5 cm; AC = 21 cm. Trên các cạnh AB, AC lấy các điểm P, Q sao cho AP = 11cm; AQ=14 cm. a) Chứng minh PQ // BC. b) Gọi G là trọng tâm của AABC. Chứng minh P, Q. G thẳng hàng. giúp mình bài 4 thôi nna

VI. Rewrite the following sentences. 1. Tim is better at English than Susan. Susan isn’t.......................................................................................... 2. We spent five hours getting to London. It................................................................................................. 3. Listening to music gives him pleasure. He enjoys........................................................................................... 4. They began studying English in 2004. They have.............................................................................................. 5. My father works as a teacher at a high school. My father is................................................................................................

1. The Mekong is one of the longer river in the world. 2. She can play the piano more good than her sister. 3. Many people believe that New York is the most great city in America. 4. Jessica is only an amateur, but she sings well than most professionals. 5. This house is more spacious as that white house I bought in Rapid City, 6. Lan is the more capable of the three girls who have tried out for the part in the play. 7. This telephone isn’t as cheap the other one, but it work much better.

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