cho hình thang abcd (ab//cd) biết ab=5cm ; bd= 10cm ;cd = 20 cm chứng minh tam giác abd~tam giác bdc cho hbh abcd có góc acb =45 độ gọi m và n theo thứ tự là hình chiếu của a trên bc , cd chứng minh tam giác amn~tam giác bac ; tính anm

tại sao nông nghiệp được xem là cơ sở để tiến hành công nghiệp hóa ở nhiều nước?

Bài 4:Cho hai tia Ox, Oy đối nhau, trên cùng một nửa mặt phẳng có bờchứa tia Ox, vẽcác tia Oz, Ot sao cho xoz=40 độ,yot=60 độ a, Chứng minh rằng Oz nằm giữa hai tia Ox và Otb b) Tính zot Tính zotbiết ,xoz=a,yot=B

Có ai giỏi Tiếng Anh ko nhỉ, giúp mk với

Bằng phương pháp hóa học hãy nhận biết các khí không màu sau: CO2,etan,hidro Giup em với ạ

Nguyên nhân khiến cho cầu thận bị suy thoái ?

I. Choose the word whose underlined part is pronounced differently from that of the others in each group 1. A. really B. hear C. clear D. bear 2. A. square B. stare C. are D. dare 3. A. vegetarian B. librarian C. various D. nation 4. A. beer B. cheer C. beehive D. engineer 5. A. read B. wear C. speak D. beat II. Choose the word whose main stressed syllable is placed differently from that of the others in each group. 6. A. popular B. population C. volleyball D. basketball 7. A. yoga B. music C. relax D. hobby 8. A. historical B. interest C. badminton D. favourite 9. A. sporty B. indoor C. outdoor D. compete 10. A. aerobics B. humorous C. practise D. separate III. Choose the best answer complete each of the following sentences. 11. Pele won three World Cup and _________ 1281 goals in his 22 years career. A. scored B. scoring C. score D. to score 12. My father likes watching motor ________________ on TV. A. race B. riding C. racing D. driving 13. Miss Hang teaches ________________ English at school. A. us B. we C. our D. ours 14. We often ______________ to keep fit and stay healthy. A. did karate B. do morning exercise C. play video game D. does yoga 15. I am not so interested in Maths as ________________ A. him is B. she is C. her is D. his 16. Students in my class take part _______ a lot of activities after school? A. at B. on C. to D. in 17. You will need a good ______ to play tennis. A. racket B. shuttlecock C. rope D. ball 18. We should use _____ to protect your eyes when you go swimming. A. clothes B. hat C. sunglasses D. goggles 19. There are two main kinds of sport: team sports and _______________. A. Private sports C. personal sports C. individual sports D. team-work sports 20. A person who plays football is a _______. A. soccer B. football player C. sport player D. gamer IV. Read the following text and decide which answer best fits each numbered blank. SOCCER – WORLD CUP 2010 Soccer is a very (21) ________ sport in many countries. The World Cup is held every four years. Thirty-two teams from around the world compete in this (22) ______. In 2010, the world Cup was played in South Africa from June 26 to July 10. The game were watched on television by (23) _______ of people around the world. Spain (24) _________ this World Cup. They (25) _______ the Netherlands in the final game by a score of 1 to 0. The next World Cup was in 2014 and it was played in Brazil. 21. A. unpopular B. popular C. popularity D. unpopularity 22. A. tour B. tourist C. tour guide D. tournament 23. A. million B. billion C. millions D. thousand 24. A. won B. win C. wins D. winning 25. A. beats B. beated C. beating D. beat

lập bảng thống kê các giai đoạn của khởi nghĩa Yên Thế

vẽ hariwon giống avatar của mk

làm chi tiết hộ e câu 2 nhé em c ơn