Câu 4. Trong phân tử một hợp chất được tạo bởi 2 nguyên tử nguyên tố R và 5 nguyên tử nguyên tổ oxi. Tim nguyên từ khối và tên nguyên tố R. Biết hợp chất này nặng hơn phân tử hidro 71 lần. /Tinh phần trăm khối lượng của R trong hợp chất trên.

Giúp mình bài 8 và bài 9 Cảm ơn nhiều <3

How Many People were there in Thai ?

Giúp t càng được hết các câu càng tốt ạ.< Trình bày viết câu khó> Thanks mn!!

Giải giúp mk nha, mk cảm ơn nhiều

Nêu các con đường lây truyền và biện pháp phòng tránh giun tròn kí sinh Nêu đặc điểm của 1 số gun đốt thường gặp Giúp mik vs ạ!!

Giúp mình bài 5 và bài 6 Cảm ơn nhiều

Một hình vuông có chu vi 60cm. diện tích hình vuông đó.

Giúp mình bài 1và bài 2 Cảm ơn <3

TEST YOURSELF GRADE 11 1. A. hungry 2. A. change 3.A. passenger 4 A. honey 5.A. change 6. A. friend 7.A. surprise 8.A. attitude Choose the word which has the underlined part pronounced differently. B. snow B. children B. magazine B. hospital B. English B. anniversary B. allow B. acquaintance В. experience B. together C. blanket C. machine C. dangerous C. holiday C. single C. birthday C. open C. constancy С. cарable C. successful D. band D. church D. village D. honest D. anger D. cream D. permit D. restaurant D. imagine D.'celebrate 9. A. acquaintance 10. A. relation Choose the best answer. 11. Your friendship should based on.. 12. If you only care about your interests and feelings, you are very.. A. happy 13. When they finished singing, Lisa.... A. turned of ...trust.A. basic B. fragile C. mutual D. blind C. loyal ..the candles on the cake. C. cleared up B. friendly D. selfish B. blew out D. brought out 14. When he I was having a shower. A. came B. had been coming C. comes D. was coming between 9.00 and 10.00 yesterday evening? C. did you do 15 What D. had you done A. do you do 16. David is so B. were you doing He only cares about herself, not about other people. B. modest C. embarrassing D. generous A. selfish 17. Christina told us about the most unforgettable experience in her life. The word unforgettable means.... A. boring 18. They do not believe cach other because there are A. constancy 19. Many of the stories are based 20. By the time we arrived, A. he left for the office C. he had left for the office 21 I saw the picture...behind the piano and I couldn't reach it.A. to fallB. fell 22. It isn't safe for children 23. There's no point in persuading him to do this. A. He is able to do this although he doesn't want to.B. It's would be useful to persuade him to do this. C. I enjoy persuading him to do this.D. It is useless to persuade him to do this. 24. B. exciting C. memorable D. intereșting .between them. C. suspicions rumor.A. at D. unselfishness B. under C. on D. in B. loyalty B. he has left for the office D. he were leaving for the office C. fallen B. to play D. fall on ladders. A. playing C. play D. played I saw an accident. B. While we were walking to school D. When we walked to school A. Before we have walked to school C. After we had walked to school 25. They greeted each other with a warm A. glance D. embrace C. scream B. friendship B. shout lasted a lifetime. A. friendly at her notes again before entering the examination room. B. watch .... the cell phone?A. use B. usingC. to use that you've passed the entrance examination. B. knowing .? C. friendliness D. friend 26. Their 27. She quickly C. observed D. glanced A. saw D. to be using 28. Do your parents allow you 29. I am delighted A. knew 30. Ngan: -... A. How is Mary alike C. What is Mary like 31 Dr. Johnson doesn't mind.... A. be called 32. Do you hope C. to know D. to knowing - Vy: She is nice and very humorous. B. What does Mary like D. What does Mary look like at home if his patients need his help. C. being called D. to be called B. calling to