Hãy viết: 5 đề văn giải thích , 5 đề văn chứng minh ( nghị luận) .

cho 8(g) CuO tác dụng với 400 ml dung dịch HCL 2 M. Cho biết sau phản ứng chất nào còn dư. Tính nồng độ của các chất sau phản ứng( giả sử thể tích dung dịch k đổi)

phân tích đa thức thanh nhân tử a,4x^4-32x^2+1 b,x^2-2x-4y^2-4y c,x^4-2x^3+2x-1 d,x^4+2x^3-4x-4

rút gọn biểu thức sau ( 50 điểm )

EX1. Give the correc form of the verbs in the bracket. (Các con nhớ chép đề và gạch chân nhé) 1. The sun always (rise) in the east. 2. In my country, it (not, rain) much in winter. 3. I like (play) tennis. 4. My brother (enjoy) playing football. He usually (play) football every afternoon. 5. My brothers (be, not) engineers. 6. Well, he is 40 years old, bald with a moustache. He (have) large ears and he (wear) glasses. 7. Hoa (visit) her parents once a year. 8. I ______________ (listen) to music in my free time. 9. It often (rain) ______________ in the summer. 10. We ______________ (not want) to see that film because it looks boring. 11. What time __________ the film __________ (begin)? 12. I promise that I ______________ (not be) late for school again. 13. Simon usually ______________ (do) his homework and ______________ (watch) TV at the same time. 14. The students ______________ (plant) some flowers in the schoolyard tomorrow. 15. Nam and Vinh______________ (play) volleyball three times a week. 16. The train ______________ (leave) at 6 o’clock in the morning. 17. She ______(water) the flowers in the garnden now 18. At the moment, we _________(have) fun in the park 19. Be quiet! The baby _______(sleep) 20. ________(she/come) to the party yet? help me (đáp án thôi)

Giúp mình bài này với ạ (Cả 4 câu luôn nha)

Bài 1 cho 2a+b+c=0 CMR 2a^3+b^3+c^3=3a(a+c)(b-c) moi nguoi giup minh voi a

Tính bằng 2 cách : a ( 6.45 + 3.55 ) x 2.15 Nhanh = hn

x2+3xy−9y2+23y−17=0 x2−2xy+3y2−6y−3=0

Exercise 8: Find the word whose stress pattern is different from the others of the same group. 1. A. disease B. humor C. cancer D. treatment 2. A. remedy B. exercise C. pollution D. surgery 3. A. pneumonia B. activity C. psychiatrist D. ordinary 4. A. persuade B. reduce C. offer D. apply 5. A. expression B. successful C. physical D. prevention 6. A. farmer B. farewell C. factory D. fairy 7. A. cattle B. country C. canal D. cover 8. A. money B. machine C. many D. mother 9. A. borrow B. agree C. await D. prepare 10. A. government B. condition C. parliament D. fortunate 11. A. paper B. police C. people D. purpose 12. A. interesting B. important C. increasing D. implying 13. A. element B. enormous C. animal D. elephant 14. A. damage B. destroy C. demand D. deny 15. A. biology B. intelligent C. environment D. infrastructure 16. A. ancient B. attack C. alive D. across 17. A. person B. purpose C. possess D. pirate 18. A. eternal B. enormous C. enemy D. Egyptian 19. A. ruler B. river C. retire D. rapid 20. A. revolution B. responsible C. renovation D. regulation