fortunate/,/ biogas/ not/ total/ harmful/ people/. A: Fortunately, biogas is not total harmful for people. B: Fortunately, biogas is not totally harmful to people. C: Fortunately, biogas is not totally harmful with people. D: Fortunate, biogas is not totally harmful of people.

Thực hiện các phép tính sau : a)3(6x^2+2x-1) =18x^2+6x-3 b)11x(4x^2-9x-7) =44x^3-99x^2-77x c)½(-3x^2+5x-8) =-3/2x^2+5/2x-4 d)14a(9ab-12c-13d) =126a^2b-168ac-182ad e)4x^2(-15x^2-22x+7) =-60x^4-88x^3+21x^2 f)(-2/3x^2+5/4x-12)(2/5x^6) =-4/15x^8+1/2x^7-24/5x^6 g)(-2y^3+2/5y-11/4)5/9y^2 =-10/9y^5+2/9y^3-55/36y^2 h)a(b-c)+b(c+d)-c(d+e) =ab-ac+bc+bd-cd+ce BT.2: Thực hiện các phép tính, thu gọn rồi tính giá trị các biểu thức : a(a-b)+b(a+b) với a=-4 với b=16 a^2-ab+ba+b^2 -4^2-(-4.16)+16.-4+16^2 -16-(-64)+(-64)+32 =16 a(a^2-b)-a^2(a+b)+b(a^2-a) với a=-25/7,b=-3/11

Có một quan niệm cho rằng .Các vật tuy được cấu tạo từ những chất khác nhau có khối lượng bằng nhau thì chúng có cùng số phân tử ,nguyên tử .Điều đó chính xác không .Tại sao

Trả lời em đi mn ơi còn nữa nên mn trả lời E

Bài 1: Hoàn thành câu sau đúng dạng thì quá khứ đơn: 1. It/ be/ cloudy/ yesterday. 2. In 1990/ we/ move/ to another city. 3. When/ you/ get/ the first gift? 4. She/ not/ go/ to the church/ five days ago. 5. How/ be/ he/ yesterday? 6. and Mrs. James/ come back home/ and/ have/ lunch/ late/ last night? 7. They/ happy/ last holiday? 8. How/ you/ get there? 9. I/ play/ football/ last/ Sunday. 10. My/ mother/ make/ two/ cake/ four/ day/ ago. 11. Tyler/ visit/ his/ grandmother/ last/ month. 12. Joni/ go/ zoo/ five/ day/ ago. 13. We/ have/ fun/ yesterday. 14. My/ father/ not/ at the office/ the day/ before yesterday. Bài 2: Lựa chọn và điền dạng đúng của từ: teach cook want spend ring be sleep study go write 1. She…..out with her boyfriend last night. 2. Laura…..a meal yesterday afternoon. 3. Mozart…..more than 600 pieces of music. 4. I…..tired when I came home. 5. The bed was very comfortable so they…..very well. 6. Jamie passed the exam because he…..very hard. 7. My father…..the teenagers to drive when he was alive. 8. Dave…..to make a fire but there was no wood. 9. The little boy…..hours in his room making his toys. 10. The telephone…..several times and then stopped before I could answer it. Bài 3: Chia động từ trong ngoặc đúng dạng thì quá khứ đơn: Snow White was the daughter of a beautiful queen, who died when the girl (be) (1)……….. young. Her father (get married) (2) ………….again, but the girl’s stepmother was very jealous of her because she was so beautiful. The evil queen (order) (3)………….a hunter to kill Snow White but he couldn’t do it because she was so lovely. He (chase) (4) ………….her away instead, and she (take) (5) ………….refuge with seven dwarfs in their house in the forest. She (live) (6) ………….with the dwarfs and took care of them and they (love) (7) ………….her dearly. Then, one day the talking mirror (tell) (8) ………….the evil queen that Snow White was still alive. She (change) (9) ………….herself into a witch and (make) (10) ………….a poisoned apple. She (go) (11) ………….to the dwarfs’ house disguised as an old woman and tempted Snow White to eat the poisoned apple, which (put) (12)………….her into an everlasting sleep. Finally, a prince (find) (13) ………….her in the glass coffin where the dwarfs had put her and woke her up with a kiss. Snow White and the prince (be) (14) ………….married and lived happily ever after.

một mảnh vườn hình chữ nhật có chiều dài gấp 2 lần chiều rộng và hơn chiều rộng 20m.Tính chu vi mảnh vườn đó?

Mark letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. A: laughed B: watched C: played D: talked

Học sinh của 3 lớp 7 đc giao trồng 36 cây. Sau khi lớp 7A trồng đc 1/5 số cây của lớp. Lớp 7B trồng đc 1/3 số cây của lớp và lớp 7C trồng đc 3/7 số cây của lớp thì số cây còn lại của mỗi lớp bằng nhau. Hỏi mỗi lớp trồng đc bao nhiu cây?xin cách tính ln

ai làm cho mk câu 2 vs ạ thanks mn

IV.Rewrite 1. Bruce is from Australia. She speaks……….. 2. let‟s/have/time/good/go/to/a/the beach/and/there. ………………………………………………………………………………… 3. my father are playing tennis. (Sua loi sai) …………………………………………………………. 4. I‟m going to visit Hanoi (dat cau hoi) …………………………………………………………………………………… 5. Let‟s go to the beach. => why don‟t we……………………………………………………………………