Cho mình hỏi tại sao `2x-x^2>0` biểu thức dưới mẫu phải khác 0 chứ ạ?

IV.Rewrite the sentences (1) 1. Her old house is bigger than her new one. -> Her new house…………………………………………… 2. No one in my class is taller than Peter. -> Peter ………………………………………………. 3. The black dress is more expensive than the white one. > The white dress …………………………………………… 4. According to me, English is easier than Maths. -> According to me, Maths …………………………………. 5. No one in my group is more intelligent than Mary. -> Mary ……………………………………………………….

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Cho A =12+x . tìm số tự nhiên x để : a/A chia hết cho 2 b/ A ko chia hết cho 2 Cho B=270+x.Tìm số tự nhiên x để: a/B chia hết cho 3 b/ B ko chia hết cho 3

III. Fill in the blank with the suitable adj/adv 1. He is (clever) ……………………. student in my group. 2. 2. She can’t stay (long) …………………….than 30 minutes. 3. 3. It’s (good) ……………………. holiday I’ve had 4. Well, the place looks (clean) …………………….now. 5. The red shirt is better but it’s (expensive) ……………………. than the white one. 6. I’ll try to finish the job (quick).……………………. 7. Being a firefighter is (dangerous) ……………………. than being a builder 8. Lan sings ( sweet ) ………………..than Hoa 9. This is (exciting) ……………………. film I’ve ever seen. 10. He runs ( fast )………………….of all. 11. My Tam is one of (popular) ……………………. singers in my country. 12. . Which planet is (close) ……………………. to the Sun? 13. Carol sings as (beautiful) …………………….as Mary, but Cindy sings the (beautiful) …………………… 14. The weather this summer is even (hot) ……………………. than last summer. 15. Your accent is ( bad ) …………………..than mine.

Giúp mình với mn ơi Đây là tìm từ trái nghĩa ạ

Hoà tan hoàn toàn gồm fe2o3 và cuo vào dung dịch h2so4 19,6% sau phản ứng thu được 56 g hỗn hợp 2 muối a) viết pthh b) tính thành phần % khối lượng mỗi oxit trong hỗn hợp c) tính c% dung dịch sau phản ứng nếu phản ứng vừa đủ d) tính c% dung dịch sau phản ứng nếu axit dùng dư 10% so với lượng phản ứng

II.Choose the best answer 1. She is ……. singer I’ve ever met. A. worse B. bad C. the worst D. badly 2. Mary is ……. responsible as Peter. A. more B. the most C. much D. as 3. It is ……. in the city than it is in the country. A. noisily B. more noisier C. noisier D. noisy 4. She sings ……….. among the singers I have known. A. the most beautiful B. the more beautiful C. the most beautifully D. the more beautifully 5. She is ……. student in my class. A. most hard-working B. more hard-working C. the most hard-working D. as hard-working 6. The English test was ……. than I thought it would be. A. the easier B. more easy C. easiest D. easier 7. English is thought to be ……. than Math. A. harder B. the more hard C. hardest D. the hardest 8. Jupiter is ……. planet in the solar system. A. the biggest B. the bigger C. bigger D. biggest 9. She runs …… in my class. A. the slowest B. the most slow C. the slowly D. the most slowly 10. My house is ……. hers. A. cheap than B. cheaper C. more cheap than D. cheaper than 11. Her office is ……. away than mine. A. father B . more far C. farther D. farer 12. Tom is ……. than David. A. handsome B. the more handsome C. more handsome D. the most handsome 13. He did the test ……….. I did. A. as bad as B. badder than C. more badly than D. worse than 14. A boat is ……. than a plane. A. slower B. slowest C. more slow D. more slower 15. My new sofa is ……. than the old one. A. more comfortable B. comfortably C. more comfortabler D. comfortable 16. Tom is ……. than David. A. handsome B. the more handsome C. more handsome D. the most handsome 17. He did the test ……….. I did. A. as bad as B. badder than C. more badly than D. worse than 18. A boat is ……. than a plane. A. slower B. slowest C. more slow D. more slower 19. My new sofa is ……. than the old one. A. more comfortable B. comfortably C. more comfortabler D. comfortable

I.Fill in the blank with the suitable adj/adv 1. Mom’s watch is … than mine. (expensive) 2. She lives in a really … villa. (beautiful) 3. She is the … tennis player of Australia. (good) 4. This luggage is … than mine. (heavy) 5. He runs … than his sister. (quick) 6. Layla is … than Henry but Sophia is the … (tall/tall) 7. Kai reads … books than Daniel but Tom reads the … (many/many) 8. France is as … as London. (beautiful) 9. My brother is three years … than me. (young) 10. This was the … movie I have ever seen. (bad) 11. I speak France … now than two years ago. (fluent) 12. Could you write…? (clear) 13. Cameroon can run … than John. (fast) 14. Our team played … of all. (bad) 15. He worked … than ever before. (hard)

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