Đặt `a/2=b/3=c/4=k (k∈Q)`
`⇒ a=2k`
`b=3k`
`c=4k`
`⇒ H = (a+2b+c)/(a+b-c) = (2k+3k.2+4k)/(2k+3k-4k) = ( 2k+6k+4k)/(2k+3k-4k) = (k.(2+6+4))/(k.(2+3-4)) = (k.12)/(k.1) = 12`
Vậy chọn đáp án `C .H=12`
Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. Question 31 : I have not met her for three years. A. The last time I met her was three years ago. B. It is three years when I will meet her. C. I did not meet her three years ago. D. During three years, I met her once. Question 32 : John, whose cough is terrible, needs to see a doctor. A. John’s terrible cough prevents from seeing a doctor. B. John need to see a doctor because of his terrible cough. C. John’s doctor does not want to see him because he has a bad cough. D. John’s terrible cough forces him to see a doctor. Question 33 : I am very interested in the book you lent me last week. A. The book is interesting enough for you to lend me last week. B. It was the interesting book which you lent me last week. C. The book which you lent me last week is too interesting to read. D. The book that you lent me last week interests me a lot. Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. Question 34: No member in the team came to his birthday party. But Julia did come. A. Julia was the only member in the team to come to his birthday party. B. Not only did Julia come to his birthday party but also other members did. C. Julia was one of the members who came to his birthday party. D. Every member in the team came to his birthday party. Question 35: What happened in class yesterday is being investigated. But we haven’t figured out. A. We don’t know what could be worked out in class yesterday. B. What to figure out in class yesterday haven’t been done. C. What happened in class yesterday hasn’t been figured out yet. D. We haven’t found out the happening class yesterday.
Giải giúp mình câu b với mình đang cần gấp
Tìm ảnh của vật hình F hộ mik vs
Giúp mk với mn ơi!!!!!!!!!!!!!!!!!!!!!!!!!
Cho mình biết từ nào là từ ghép từ nào là từ láy với
giúp đi please x2 , hay nhất đây
Em hãy kể một kỉ niệm khó quên về tình bạn(Càng dài càng nhiều sao nha mn:3)
Cho 150g dd NaOH 12% tác dụng vừa đủ với dd FeCl3 1.5M rồi lọc toàn bộ kết tủa thu được đm nung đến khối lượng không đổi thì được chất rắn A. Hãy tính: 1. Thể tích dd FeCl3 2. Khối lượng của A
Cứu mik vs, ai trl giúp mik đầu tiên mik cho CTLHN. Cám ơn mn rất nhìu ạ!!!!!!!!
AI LM ĐC CHO 5 SAO LUÔN, K NS NHIỀU
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến