Tại sao flo ko thể tạo muối chứa oxi.

13) 2x-19/5(x^2-5) - 17/x-1 = 3/1-x 14) x+3/x-3 - x-3/x+3 = -3/9-x^2

Bài này khá là hay nè mn CM rằng : `a/b=c/d` thì `[a^2021+b^2021]/[c^2021+d^2021]=([a-b]/[c-d])^2021`

Hỗn hợp x gồm 2 kim loại a,b hoá trị ko đổi , đứng trước H2. Lấy 6,1g X tác dụng với O2 tạo ra 11,1g oxit. Lấy 12,6g X +HCl dư thu được V(l) H2. Tính V? Help me!

I. Choose the best word or phrase to complete the following sentences. Circle the letter A, B, C or D. 1. “Buy me a newspaper on your way back, ______?” A. do you B. don’t you C. can’t you D. will you 2. The bad weather caused serious damage to the crop. If only it ______ warmer. A. were B. had been C. has been D. was 3. We have to start early ______ we’ll be late for school. A. whereas B. although C. or else D. so that 4. He managed to finish the report under the ______ of his tutor. A. guidance B. help C. aid D. assistance 5. He missed the last bus, and ______ made the matter worse was that it began to rain. A. that B. what C. which D. it 6. The Internet helps us get access _______ the latest information around the world. A. at B. in C. on D. to 7. I asked him to do exactly ______ what he had promised. A. like B. same as C. such as D. as 8. The girl found it hard to______ the loss of her little dog. She cried a lot. A. get over B. turn over C. put off D. get along 9. Kelly wanted to have a live band _______ at her wedding. A. to be played B. play C. played D. been playing 10. Lisa: “Have you been able to reach Peter?”        Gina: “ _______ ” A. Yes, I have known him for years.                        B. It’s much too high. C. No, the line is busy.                                             D. There’s no approval. II. Read the sentences carefully and choose the best answers to make complete ones. 1. Those interested in the post of Assistant Manager are requested to apply _______. A. as a person B. in person C. as persons D. by person 2. I don’t care _______ you go or not. A. where B. when C. why D. whether 3. If it wasn’t you who took my pen, it must have been _______. A. somebody B. somebody else C. another one D. anybody 4. Did the man _______ by the committee accept the job? A. appointing B. appointed C. was appointed D. to appoint 5. Don’t leave your clothes _______ about on the bedroom floor. A. lie B. lay C. lying D. laying 6. She raced by in a car, with her hair _______ behind. A. streamed B. stream C. streams D. streaming 7. I had my younger brother _______ the newspaper to me while I was abroad. A. to send B. sent C. send D. sending 8. Joe, I am inclined _______ Appiah’s complicity in the big fraud. A. about believing B. in believing C. for believing D. to believe 9. Now listen to me John. As far as your examination results are concerned, you needn’t worry so much, _______? A. isn’t it B. need you C. do you D. aren’t they 10. His arrogance makes him _______ whenever he goes. A. hated B. hate C. to hate D. hating

helu m.n hôm nay mik thấy 1 ý tưởng của 1 bn và mik đã xin phép bn ý cho mik sao chép chút ý tưởng và bn ý đã đòng ý nên mik sẽ chia sẻ hành trình cưa đổ crush của mik nha vẽ đồ ăn trung quốc đi nhớ ko sao chép , spam nhé :3

Với a,b,c là các số thực ko âm luôn thoả mãn a^2 +b^2+c^2= 2ab+2bc+2ac CM a+b+c>= 3 ³√2abc

Ex 9. Match the words in column A with the words in column b: A:get go have do listen watch B:to music homework up to school television breakfast

Vẽ chibi hoặc anime :Đ

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