Tinh khối lượmg NaOHcó trong 200ml dd NaOH20%, có k/l riêng1,2g/ml.

thửa ruộng thứ 1 thu hoạch hơn thửa ruộng thứ 2 4 tạ thóc. Biết số thóc thu hoạch ở thửa ruộng thứ bằng 1/3 số thóc thu hoạch được ở thửa ruộng thứ 1. Hỏi mỗi thửa ruộng thu hoạch được bao nhiêu kg thóc 5* + ctlhn+ 1 cảm ơn

x và y là đồng vị của nhau hạt nhân của x có số notron nhiều hơn của hạt nhân y là 2. trong tự nhiên X là 45 % . Tính số khối X và Y9 nguyên tử khối TB của x và y là 79,9)

x^2y-6xy+9y phân tích thành nhân tử

Nêu lại 4 cột âm tính của âm thanh có tiếng nhạc?

41. I like roller skating and my brother does, too - (so).................................................................... 42. How much are these rackets? - How much do ...................................................? 43. My school has thirty classrooms - (are).................................................................... 44. Literature interests my brother a lot - (interested)........................................................... 45. Nam like staying at home than going to the zoo - (prefers).............................................................. 46. Let’s visit the beautiful Khmer temples of Angkor Wat this summer - How about ........................................................... 47. Listening to music at home is more interesting than going to the concert - I prefer .................................................................. 48. We didn’t enjoy the trip because of the heavy rain - The heavy rain prevented ....................................... 49. You shouldn’t eat too many candies - You’d .................................................................... 50. He is a slower and more careful driver than I am - He drives ............................................................. 51. The visitor spoke so quickly that I couldn’t understand what he said - The visitor spoke too ............................................ 52. Jane found driving on the left difficult - Jane wasn’t used .................................................. 53. How about eating out tonight? - Why don’t we ......................................................? 54. Han is a better swimmer than Lan - Lan can’t swim ..................................................... 55. Can she take care of herself when her mother is away? - Can she look .......................................................? 56. Let’s visit the museum this afternoon - What about our ..................................................? 57. Where can I find the station ? - Could you tell me how .......................................? 58. We took a train to HCM city - We got to ............................................................ 59. It’ll be not necessary for you to go to the meeting next week - You won’t have ................................................... 60. How long was your flight from Ha Noi to Jakarta? - How long did ......................................................?

Giúppppp mkkkkkkkkk vssssssssss 8h30p mk cần rồi :(( Bài 1 : Thêm đuôi s / es vào sau các động từ sau sao cho đúng : Finish Get Go Have Meet Play Tell Think Travel Use Wash Watch Bài 2 : Chọn câu trả lời đúng : 1. My sister ( go / goes ) ice skating every winter. 2. They seldom ( have / has ) dinner with each other. 3. I ( come / comes ) from Ha Noi, Viet Nam. 4. Jim and I ( don't / doesn't ) go to school by bus. 5. His hobby ( is / are ) collecting stamps. 6. Jane and I ( am / are ) best friends. 7. My cat doesn't ( eat / eats ) vegetables. 8. ( Does / Do ) your mother finish her work at 4 o'clock? 9. We ( watch / watches ) TV everyday. 10. Peter never ( forgets / forget ) to do his homework. 11. Tom always ( win / wins ) when he plays chess. 12. ( Do / Are ) you a student? 13. Mice ( is / are ) afraid of cats. 14. How does your father ( travel / travels ) to work everyday? 15. They somtimes ( go / goes ) sightseeing in rural areas. Bài 3 : Tìm lỗi sai và viết lại câu đúng : 1. My brother and my sister doesn't like playing board games. 2. Does Mr. and Mr. Parker make pottery everyday? 3. Does bird- watching is Tom's hobby? 4. How often you polish your car? 5. My friend don't work in this company. 6. James live in Australia 7. Are you ge up early in the morning? 8. Does Sarah drives to work everyday? 9. Elana haves a beautifull smile. 10. What does the children do in their free time?

phan tich da thuc thanh nhan tu 3y^2-3z^2+3x^2+6xy

viết 5 câu có từ nghĩa rộng và nghĩa hẹp về vấn đề xã hội

đọc phần (1) của đoạn trích , điền thông tin phù hợp và các cột trong bảng sau :