Để m(g) Fe trong không khí bị oxi hóa 1 phần thành 22(g) hỗn hợp các oxit và Fe dư. Hòa tan hỗn hợp này vào dung dịch HNO3 dư thu được 4,48 lit khí NO duy nhất (đkc). Tìm m.

phát hiện lỗi sai áha Write the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. Question 21: When we are (A) on holiday (B) , we used to go to (C) the beach every day (D) . Question 22: We wish we can (A) consult an (B) expert on how to solve (C) this problem (D) . Question 23: The environmentalist suggest (A) planting (B) more trees to improve the city’s landscape (C) and the environment as well (D). Question 24: He works (A) much more hard (B) for his exams than he does (C) for his normal (D) schoolwork.

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Câu 1: Du lịch biển mới tập trung ở hình thức A. tắm biển. B. bóng chuyền trên cát. C. du thuyền. D. lặn biển. Câu 2: Dọc bờ biển nước ta có A. ba cơ sở sản xuất muối lớn. B. hai cơ sở sản xuất muối lớn . C. một cơ sở sản xuất muối lớn. D. không có cơ sở sản xuất muối nào. Câu 3: Bãi cát có chứa ôxittitan có giá trị xuất khẩu thuộc A.Hải Phòng . B. Vũng Tàu. C. Quảng Ninh, Khánh Hòa. D. Đà Nẵng. Câu 4: Tài nguyên khoáng sản quan trọng nhất ở thềm lục địa là A. dầu mỏ . B. Khí thiên nhiên. C. dầu mỏ, Khí thiên nhiên. D. quặng. Câu 5: Cả nước hình thành được A. bốn cụm cơ khí đóng tàu biển. B. năm cụm cơ khí đóng tàu biển. C. sáu cụm cơ khí đóng tàu biển D. ba cụm cơ khí đóng tàu biển: Bắc, trung , nam . Câu 6: Ônhiễm biển dẫn đến hậu quả nghiêm trọng về A.sinh vật biển, du lịch biển. B. Giao thông biển. C. khoáng sản biển. D. muối biển. Câu 7: Trong bảo vệ tài nguyên môi trường biển có A. 2 phương hướng chính. B. 3 phương hướng chính. C. 4 phương hướng chính. D. 5 phương hướng chính.

Ex3: Complete each sentence with a suitable word. subjects - disagreed - hedge - dressed – laundry show - alarm clock - complicated - replace - factory 1. My house is surrounded by a green ___________. 2. All of my clothes are dirty. I must do ___________ now. 3. I get up at 06:30 every morning to have enough time to get ___________. 4. Yesterday my ___________ did not go off, so I was late for school. 5. There is a game ___________ at 08:00 tonight, I will try to finish my homework before it. 6. How many ___________ do you have at school? 7. Yesterday my father and I had a conflict because he ___________ to let me go out before 10 p.m. 8. My father is a worker. He works in the tobacco ___________ near here. 9. Do you think robots can ___________ people in the future? 10. I do not like Mathematics so much. The numbers and the formulas are so ___________. I prefer Literature.

a)3.(x+3). 2.(x+7=103 b)3.x=4.(x-12)

hu hhu 60 điểm cả gi tài của tui

helpppp Question 5: The city has recently set _____ a library in the West Suburb. A. up B. off C. out D. down Question 6: Nam didn’t know________ to find more information about the course. A. what B. why C. where D. while Question 7: He asked________ it was too early to apply for the course. A. if B. for C. when D. that Question 8: I couldn’t sleep last night________ the bar nearby played music so loudly. A. although B. so that C. while D. because Question 9: Lots of people choose to buy houses in the suburbs_________ they can avoid the noise and pollution in the city. A. although B. when C. so that D. so as Question 10: You should _______ the shoes when coming into the Japanese houses A. take off B. put on C. get off D. take on Question 11: My grandfather is the___ oldest artisan in the village; Ngoc`s grandfather is the oldest. A. first B. second C. most D. one Question 12: Eating _______ food is extremely important in order to maintain a good health. A. fatty B. nutritious C. junk D. salty Question 13: I've_______ the product catalogue and decided to buy this table. A. found out B. closed down C. looked through D. lived on Question 14: Today’s cities are_______than cities in previous times. A lots larger B much larger C as large D the largest Question 15: He asked_______it was too early to apply for the course. A. if B for C. when D that Question 16: This work doesn’t bother me. I_______hard. I've worked hard all my life. A. used to working B. used to work C. am used to work D. am used to work Write the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. Question 17: I also passed on the news I had heard from the town and the other villages. A. tell B. told C. say D. listened Question 18 : The doctor wanted to go over the test results with his patients. A. refuse B. make a note C. examine D. see Write the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. Question 19: . Do you want to lie in a metropolitan city? A. rural B. urban C. countryside D. A&C Question 20: The simplicity of form makes English easy to learn. A. complication B. openness C. difficulty D. fluency

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