ghi mở bài tả người mà em thực sự biết ơn MẸ NHÁ

Mn lm ơn giúp em bài này vs ạ ! Chiều 1h em phải học rồi ạ ! Em cảm ơn

vẽ đậu mầm cute vui mừng nhé nl : vui quá : thi trực tuyến để lên lớp đc : TV 70/70 TOÁN 90/100 SỬ - ĐỊA 90/100 yeeeeeeeeeeeeeeeeeeeeeeeeeeee vui quá còn mỗi môn khoa học nx là thăng lớp ye

Chia 39,9 gam hỗn hợp X ở dạng bột gồm Na, Al, Fe thành ba phần bằng nhau : - Phần 1: cho tác dụng với nước dư, giải phóng ra 4,48 lít khí H2. - Phần 2: Cho tác dụng với dung dịch NaOH dư, giải phóng ra 7,84 lít khí H2. - Phần 3: Cho vào dung dịch HCl dư, thấy giải phóng ra V lít khí H2 (các khí đo ở đktc). Giá trị của V là ? ( có cách nào không dùng định luật bảo toàn e không ạ)

bài 1 : thu gọn $\frac{1}{2}$x . $\frac{1}{4}$$x^{2}$ . \frac{$x^{3}$ }{8} . 2y . 4$y^{2}$ . 8$y^{3}$ bài 2 : viết đơn thức sau dưới dạng tích 2 đơn thức trong đó 1 đơn thức là 3$x^{3}$$y^{2}$ z 2^2 y^2 z^2

Cho pt: `x^2-2x+m-2=0` a) Tìm `m` để pt có `2` nghiệm pb `x\in [0; 3]` b) Tìm `m` để pt có `2` nghiệm pb tm `x_1<2<x_2` `\text{Lưu ý: ko giải ra nghiệm của pt}`

Mark the correct option A, B, C or D: 1. I don't understand this point of grammar. I wish I ______ it better. A. understood B. would understand C. had understood D. understands 2. It never stops raining here. I wish it ______ raining. A. stopped B. would stop C. had stopped D. will stop 3. I miss my friends. I wish my friends ______ here right now. A. were B. would be C. had been D. was 4. I should never have said that. I wish I ______ that. A. didn't say B. wouldn't say C. hadn't said D. says 5. I speak terrible English. I wish I ______ English well. A. spoke B. would speak C. had spoken D. speaks 6. I cannot sleep. The dog next door is making too much noise. I wish it ______ quiet. A kept B. would keep C. had kept D. will keep 7. This train is very slow. The earlier train was much faster. I wish I ____ the earlier train. A. caughtB. would catch C. had caught D. catches 8. I didn't see the TV programme but everybody said it was excellent. I wish I ___ it. A. saw B. would see C. had seen D. seen 9. I went out in the rain and now I have a bad cold. I wish I ______ out. A. didn't go B. wouldn't go C. hadn't gone D. went 10. This movie is terrible. I wish we ______ to see another one. A. went B. would go C. had gone D. go 11. I hate living in England. It's cold and it's damp. I wish I ______ in Spain. A. lived B. would live C. had lived D. live 12. I was only in Miami for a week. I wish I ______ more time there but I had to go on to New York. A. had B. would have C. had had D. have 13. You drive too fast. I wish you__________ more slowly. A. drive B. drove C. had driven D. would drive 14. He missed an exciting football match on TV last night. He wishes that he _______ it. A. watched B. would watch C. had watched D. watches 15. My face is bright red. I wish I ______ in the sun so long yesterday A. didn't sit B. wouldn't sit C. hadn't sat D. sat 16. It was supposed to be a secret. I wish you ______ him. A. didn't tell B. wouldn't tell C. hadn't told D. tell 17. They didn't offer me the job. I wish they ______ it to me. A. offered B. would offer C. had offered D. offer 18. It’s a pity I didn’t take my doctor’s advice. - I wish you __________ the doctor's advice. A. took B. would take C. had taken D. could take 19. I hate having red hair. I wish I ______ blonde hair. A. had B. would have C. had had D. am having 20. This exercise is very boring. I wish the teacher ______ us some more interesting things to do.

vẽ mầm khó hiểu :D nl: shock wa' tr oi hmu hmu :)) hàng real hay mạng mà đẹp zẫy các pác :) vào thì thấy có 1 layer còn lại toàn folder :D

Ai đó có thể giúp em giải bài này được không ạ, em cũng cần luôn lời giải thích ạ: - Cho 14,2 g P205 tác dụng với 200g dd chứa KOH 1,968% và Ba(OH)2 4,2758% thu được m gam kết tủa và dd X. Cô cạn dd X thu được a gam chất rắn. Tính m và a?

cần gấp ạ. vote5 sao câu 6, 7,8