42525-11340:405 cách giải bài toán này như thế nào

Cho hình hộp ABCD.A’B’C’D’ có các cạnh bằng a, góc BAD=60 độ, BAA'=DAA'=120 độ a) Tính góc giữa các cặp đường thẳng AB với A’D và AC’ với B’D b) Tính góc giữa đường thẳng AC’ và các đường thẳng AB, AD, AA

Giúp mik vs ạ đang cần gấp I. Circle the correct answer (A,B,C or D) to complete each sentence. 1. Tet is an occasion for people to show their to their ancestors. A. respect B. society C. remember D. reserved 2. They spent 2 hours how to make Chung Cake. A. to learn B. learn C. learning D. to learning 3. Most ethnic minorities live in areas. A. mountainous B. rural C. urban D. modern 4. Vietnam is a multi-cultural country with over 50 ______ groups. A. popular B. rich C. ethnic D. major 5. Lan is hooked ______ K-pop. A. at B. on C. in D. to 6. Parents often prevent their children from the computer games. A. playing B. to play C. play D. plays 7. Banh Chung is one of the foods in Vietnam. A. complex B. traditional C. disgust D. tasteless 8. When you do such as football, volleyball, you develop team spirit. A. outdoor activities B. team sports C. indoor activities D. individual activities 9. Hmong is an ethnic . A. minority B. area. C. people D. region. 10. is the largest ethnic group? - The Kinh A. Whom B. When C. Who D. Why 11. The boys often help their parents to _________ water from the village well. A. gather B. collect C. give D. find 12. In the countryside, people can see the ______ fields stretching to the horizon. A. peaceful B. vast C. quiet D. nomadic 13. ______ month is the Hoa Ban Festival of the Thai people held in? A. When B. Which C. How many D. How often 14. It is typical of the cultural life of Thai people. A. some B. a C. the D. φ 15. An old woman was the goats up the mountainside. A. riding B. taking C. herding D. running 16. The sentence “c u 2moro” means: A. See you tomorrow B. Nice to meet you C. Thanks to you D. Chat you tomorrow 17. A ______ is a type of box that people use for keeping bees in. A. beehive B. kennel C. grassland D. set 18. Many People are computers and mobile phones. They use them a lot. A. bored with B. addicted to C. worried about D. afraid of 19. I love with my best friend on the weekend. We go window- shopping or to the cinema. A. chatting B. texting C. hanging out D. visiting 20. My younger sister has found a .kit in the storage. A. CD B. origami C. craft D. book

Tìm và ghi lại 4 câu thành ngữ ,tục ngữ,ca dao có nội dung khuyên bảo về cách ăn mặc,đi đứng,nói năng

Complete the sentences below using the correct form of comparative or superlative adjectives. 9. Nile River is ……………………………… river in the world. (long) 10.This book is ……………………………… of these books. (interesting) 11. Ho Chi Minh City is ……………………………… city in Viet Nam. (big) 12.They are ……………………………… students in my class. (good) 13.These houses are ……………………………… in the village. (beautiful) 14.Winter is ……………………………… season in the year. (cold) 15.Airplane is ……………………………… means of transport. (fast)

vì sao Bắc Mĩ lại có nhiều siêu đô thị lớn của thế giới

Một mảnh đất hình chữ nhật có chiều dài là 26m, chiều rộng 6,5m. Người ta dành 62,5% diện tích đất để làm nhà. Hỏi diện tích đất làm nhà là bao nhiêu m 2 ?

Bạn nài giỏi hóa giúp mình với 😭😥😭😭

Trong văn bản "Nói với con" của Y Phương,người cha đã nhắc đến những cội nguồn tình cảm nào?

11. Laura fell asleep during the lesson____________ she was tired. * A. so B. but C. because D. however 12. Tomorrow the director will have a meeting____________ 8:00 am to 10:00 am. * A. between B. from C. among D. in 13. We_____________ anything from James since we left school. * A. haven’t heard B. heard C. had hears D. didn’t hear 14. He runs_____________ than his cousin * A. more quickly B. quickly C. quicker D. quickest 15. No one in this class is more intelligent than Mary * _________________________________________________ 16. Dam Vinh Hung is a good singer. * _________________________________________________ 17. Giang is a better painter than Huong. * _________________________________________________ 18. Lan likes acting. She is___________________________. * 19. I am not you, so I can't solve this problem. If I _________________________________________________ * 20. The weather is fine today, so we hang out with our friends. Because of_________________________________________ * [help me]