bài 1: Phân loại và viết CTHH của các chất có tên sau: dinitơ oxit, thủy ngân (II) oxit, silic dioxit, bạc oxit, nhôm oxit. bài 2: Lấy 3 ví dụ về sự oxi hóa có lợi và sự oxi hóa có hại trong đời sống ở địa phương em.

Viet Nam is.............multicultural country with 54 ethnic group A. a B. an C. the D. A và C

VIII. What do you say in these situations? 51. The class is very noisy when the teacher is away for a few minutes. You say, “______________________________________________________” 52. Nam watches too much television but doesn’t play any sports. You say, “______________________________________________________” 53. The examinations are coming, but your classmate, Hung, doesn’t study hard enough. You say, “______________________________________________________” 54. The pool is very deep, and it also has rocks. You say, “______________________________________________________” 55. Teasing wild animals is very dangerous. You say, “______________________________________________________” IX. Put the words in the correct order. 56. go/ do/ weekend/ on/ always/ fishing/ parents/ their? ________________________________________________________________ 57. every/ play/ day/ badminton/ Lan/ does? ________________________________________________________________ 58. now/ doing/ she/ aerobics/ is. ________________________________________________________________ 59. children/ to/ movies/ do/ the/ how/ go/ the/ often? ________________________________________________________________ 60. often/ video/ the/ games/ plays/ Nam/ afternoon/ in. ________________________________________________________________ 61. a/ the/ sometimes/ students/ picnic/ have. ________________________________________________________________ 62. camping/ they/ go/ do/ sometimes? ________________________________________________________________ 63. ususally/ his/ swimming/ with/ friends/ he/ goes. ________________________________________________________________ 64. sailing/ my house/ my classmate Nam/ on the river/ last summer/ went/ with/ I/ near. ________________________________________________________________ 65. your eyes/ swimming/ should/ when/ goggles/ you/ you/ go/ wear/ to protect. ________________________________________________________________ X. Make questions for the underlined part in each sentence. 66. The Olympics Games are held once every four years. ________________________________________________________________ 67. The children are playing tug of war. __________________________________________________________________. 68. The first Olympic Games took place in Greece in 776 BC. ________________________________________________________________ 69. Pele began his career at the age of 15. __________________________________________________________________. 70. I really like swimming because it helps me keep fit. ________________________________________________________________

cs nhà nghiên cứu nhận định rằng: " Nguyên Hồng là nhà văn của phụ nữ và nhi đồng." hãy cm (cm qua các tác phẩm của Nguyên Hồng chứ k phải chỉ cs Trong Lòng Mẹ) mn đừng chép mạng nha.cảm ơn mn nhiều ^.^

Cho tam giác ABC cân ở A. Gọi D là trung điểm của cạnh BC. Kẻ DE vuông góc AB, DF vuông góc AC. Chứng minh: a. Tam giác DEB = tam giác DFC b. Tam giác AED = tam giác AFD c. AD là tia phân giác của góc BAC giúp mình với!

Một nhà máy ngày 2 sản xuất hơn ngày 1 là 1,35 tấn thóc.Nếu ngày 1 ít hơn thực tế 1,775 tấn,ngày 2 nhiều hơn thực tế 1,985 tấn thì ngày 2 gấp đôi ngày 1.Hỏi thực tế mỗi ngày sản xuất được bao nhiêu tấn?GIẢI RA NHA

Tìm số tự nhiên n, biết:25<5^n ≤125.kết quả n viết đáp án thui nha ko cần trả lời

: Em hãy kể những đặc điểm chung của Bò sát:

Một người đi từ nhà ra ga ,sau khi đi 20 phút đầu với vận tốc là 12km/h, người đó tính lại rằng nếu cứ đi theo vận tốc đó thì sẽ đến đúng giờ tàu chạy . Người đó muốn đến sớm hơn giờ tàu chạy 10 phút nên trên đoạn đường còn lại người đó đi với vận tốc 16km/h.Tính đoạn đường từ nhà đén ga

VI. Read the passage, and then decide whether the sentences are True or False. I have three good friends: Ba, Lan, and Hoa. They like sports. Ba likes soccer and tennis; Lan likes badminton; and Hoa likes aerobics. They all like watching soccer on television. Ba often plays soccer in the afternoon with his classmates at the weekend. Lan plays badminton twice a week, and Hoa does aerobics on Thursday and Sunday. Lan and Hoa play sports at the sports club. 41. Ba, Lan, and Hoa like the same sports. __________________ 42. ba plays soccer every day. __________________ 43. Lan plays badminton three times a week. __________________ 44. Hoa does aerobics twice a week. __________________ 45. Lan and Hoa play sports at home. __________________ VII. Read Leo’s report about his favourite sport. Choose the correct answer A, B or C. “Water polo is a new sport at our school, but we have a good team now. We practice after school on Thursday at the Northside Pool and we’re doing well in the National Schools Competition. There are seven players in a water polo team. The game is a bit like football because each team tries to score a goal with a ball. But in water polo you don’t use your feet - you catch and throw the ball with one hand. And you never stop swimming. A game lasts 32 minutes, and in that time you swim up and down a 30-meter pool lots of times. If you aren’t fit, water polo isn’t the sport for you! For me, it’s great, because I love being in the water and I can swim fast. I also enjoy being part of a team. We have some excellent players and we’re all good friends. So it’s fun, and it’s also a fantastic way to get fit”. Leo Johnson 46. People play water polo________. A. in a stadium B. in a swimming pool C. at the beach 47. His team plays ________. A. well B. badly C. in a new competition59. 48. Water polo players ________. A. often play football B. bounce the ball C. doesn’t kick the ball 49. In a water polo game, players _________. A. can’t use their hands B. sometimes swim 30 meters C. swim all the time 50. Leo ________. A. isn’t very fit B. can swim quickly C. likes playing individually