Câu 1 pH của dung dịch thu được khi hòa tan 8g NaOH vào 500ml dung dịch Ba(OH)2 0,01M là? Câu 2 trộn a mol H2SO4 với b mol KOH thì thu được dung dịch làm quỳ tím hóa đỏ. Chọn : a. a<b<2a b. a>b c. b>a d.2a>b

Đề: hoàn thành phương trình phản ứng sau

11. They waited ___ in long queues. A. patient B. patience C. patiently D. impatient 12. He rescued a child ___ drowning. A. from B. off C. on D. with 13. It ___ 2 years since I last saw Joe. A. was B. has been C. is D. B & C 14. A truck went out of control and ___ into the back of a bus. A. fell B. went C. took D. crashed 15. Have you written your assignment ___? A. yet B. just C. still D. ever 16. Would you mind ___ me a lift home from school? A. taking B. driving C. giving D. making 17. She was the daughter of Chinese ___ to America. A. immigrate B. immigrants C. immigration D. immigrated 18. don’t you come to my house? – OK. Let’s go. A. Why B. Let’s C. What D. How 19. Which of the following words is different from the others? A. hospital B. school C. restaurant D. building 20. The summer vacation for almost three months. A. longs B. lasts C. is D. has 21. anyone else about my problem yet. A. I haven’t told B. I’m not telling C. I didn’t tell D. I don’t tell 22. My granny that detective novel. A. has already read B. has yet read C. readed D. is reading 23. There a lot of changes in Vietnam since the 1990s. A. was B. have been C. has been D. are 24. My dog my cat since I came home. A. is chasing B. has chased C. chased D. chases 25. It’s a great movie. I have that movie many times. A. have saw B. have seen D. saw D. seen 26. Have you really strange or interesting food? A. eat B. ate C. never eaten D. ever eaten 27. your brother talked to you yet? Yes, he . A. Has / did B. Have / have C. Has / has D. Did / have 28. My family and I to many different countries around the world. A. have flown B. has flown C. flew C. flow 29. Have you finished answering all the questions ? A. yet B. over C. never D. ever 30. Either Mrs. Chen or the girls the hen-house. A. has washed B. have washed C. is washing D. are washed

Giúp mình với, mình đang cần gấp

Cho 2 số nguyên dương a, b. Có bao nhiêu số nguyên tố trong đoạn [a, b]. Dữ liệu nhập: - Dòng đầu tiên ghi số k là số các đoạn [a, b] - Tiếp theo là k dòng mỗi dòng ghi 2 số a, b. Kết quả: - Gồm k dòng, dòng thứ i ghi một số là số các số nguyên tố trong đoạn [a, b] thứ i đã cho. Ràng buộc: - 1 ≤ a ≤ b ≤ 1.000.000 - 1 ≤ k ≤ 100 Yêu cầu :sử dụng sàng số nguyên sô + prefix sum Ví dụ input 1 1 5 output 3 Mn giúp vs,em cần gấp ạ

I. Choose the word in each group that has the underlined part pronounced differently from the rest. 1. A. southern B. within C. although D. growth 2. A. technology B. lunch C. kitchen D. purchase 3. A. ocean B. official C. sincere D. ancient 4. A. eleven B. elephant C. examine D. exact 5. A. assure B. pressure C. possession D. assist II. Choose a word in each line that has different stress pattern. 6. A. reserve B. receive C. rescue D. remain 7. A. success B. luggage C. journey D. helicopter 8. A. enormous B. comfortable C. expensive D. convenient 9. A. immigrant B. criminal C. ancestor D. descendant 10. A. German B. Brazilian C. Italian D. American

Truyện cổ tích thường được trình bày theo phương thức biểu đạt nào

mọi người chỉ giúp em với ạ ...em cảm ơn nhiều ạ

IV. Underline then correct ONE mistake in each sentence. 26. He won two gold medals since the beginning of the SEA GAMES. 27. Most boys in my class enjoy to read comic books. 28. Mark used to played the guitar when he was a student. 29. Marie wanted buy some food, so she went to the supermarket. 30. My new coat is the same with my sister’s coat. Khônng cần giải thích

Mn giúp mk với. Nêu giúp mk thời gian và đặc điểm của từng giai đoạn là đc rồi. Cảm ơn mn❤️