dùng H2 để khử 20g Fe2O4 ở nhiệt độ cao. Tính khối lượng Fe thu được biết hiệu suất 80 %

Vẽ đậu mầm tức giận ạ !! ............. Trầm cảm :))

Viết câu nói về tết trung thu, sử dụng công thức sau: 2. The Mid-Autumn is a very important holiday because (clause of reason)

Mark the letter A,B, C or D on your answer sheet to indicate the correct answer to each of the following questions __________ he spent much money on the film, it wasn’t a big success. A. Although B. Despite C. Even D. But 6 Mark the letter A,B, C or D on your answer sheet to indicate the correct answer to each of the following questions Linda used to __________ morning exercise when she got up early. . A. do B. did C. does D. doing 7 Mark the letter A,B, C or D on your answer sheet to indicate the correct answer to each of the following questions Remember to __________ the lights before going to bed. A. stop B. turn on C. turn D. turn off 8 Mark the letter A,B, C or D on your answer sheet to indicate the correct answer to each of the following questions Alternative sources of energy __________ developed in the near future. A. will be B. is C. was D. has been 9 Mark the letter A,B, C or D on your answer sheet to indicate the correct answer to each of the following questions __________ source of energy is the source that can’t be replaced after use. A. Renewable B. Non-renewable C. Effective D. Natural 10 Mark the letter A,B, C or D on your answer sheet to indicate the correct answer to each of the following questions The white cat is Helen’s, and the black cat is __________ . A. my B. of mine C. me D. mine 11 Mark the letter A,B, C or D on your answer sheet to indicate the correct answer to each of the following questions A sky safety system can help cars to __________ traffic jams and crashes A. take B. use C. have D. prevent 12 Mark the letter A,B, C or D on your answer sheet to indicate the correct answer to each of the following questions The children can speak English, __________ ? A. they can B. they can’t C. can’t they D. can they

Vẽ chibi trên app full màu và line pic ksi pic ko

1.Tính: a,A=15.4¹².9⁷-4.3¹⁵.8⁸ ————————————— 19.2²⁴.3¹⁴_6.4¹².27⁵ b,B=9+99+999+...+9999999999

Hai dây dẫn thẳng dài đặt song song cách nhau 20 cm trong không khí. Cho lực từ tác dụng lên mỗi mét chiều dài của mỗi dây là 2.10-4 N và tổng cường độ dòng điện chạy trong hai dây dẫn là 30 A, khi đó cường độ dòng điện trong mỗi dây

Viết câu nói về tết trung thu, sử dụng công thức sau: 1. During (noun phrase), most Vietnamese families (verb phrase).

V. Give the correct form of the word in brackets. Question 21. Evolution occurs as a result of ________ to new environments. (ADAPT) Question 22. In Russia, it is believed that black cats bring ________ to the people who happen to meet them. (FORTUNE) Question 23. _________ is the business of organizing holidays to places that people do not usually visit in a way which does not damage the environment. (TOURISM) IX. Rewrite sentences with the same meaning to the first one. Question 36. Shakespeare was a famous playwright. His birthplace was Stratford-upon-Avon. => Shakespeare …………………………………………… Question 37. The hotel wasn’t very clean. We stayed at that hotel. => The hotel……………………………………… Question 38. The porter said to me, "I'll wake you up when the train arrives in Leeds." => The porter………………………………… Question 39. Don’t be impatient or you will make mistakes. => If …………………………………… Question 40. Nancy doesn’t live near the park. She can’t go running there every morning. => If ……………………………………

Giúp em với em cần gấp đang thi