x(x-1)(x+4)(x+5)=84 giải phương trình

BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 4 I.Write the correct letters below the numbers. 12345678 9 10 11 12 13 14 15 16 17 8 19 20 21 22 23 24 25 26 abcdefg hijkl mnopqrstuv w x y z 6 1 18 13 5 18 1.I 16 9 12 15 20 19 2. We 3. Joe 14 21 18 19 5 4. Beth 19 9 14 7 5 18 5. I 3 12 15 23 14 6. They 1 19 20 18 15 14 1 21 20 19 7. My cousin 19 3 9 5 14 20 9 19 20 8. We 4 15 3 20 15 18 19 9. You 20 1 24 9 4 18 9 22 5 18 10. He 16 15 12 9 35 13 1 14 11. Bill and Ben 12. My friend 2 21 20 3 8 5 18 19 TAXI 16 8 15 20 15 7 18 1 16 85 18

Vẽ đậu mầm ngủ (~￣v￣)~ Ngoài lề : Chúc mn ngủ ngon ! -- ngày mai có ko khí lạnh nên mn nhớ mặc ấm

Cho a, b, c, d thỏa mãn a+b=c+d , a^2=b^2. Chứng minh rằng: a^2003+b^2003=c^2003+d^2003 Giúp mình với, đang cần gấp😥😥

so sánh điểm giống của bộ máy nhà nc thời lê sơ và thời lý trần

Làm cho mik phép chia này mà ko đặt ngang

Giải hệ phương trình: $\left \{ {{\large{x^2+2y^2+xy^2=2+x-2x^2}} \atop {\large{4y^2=(\sqrt{y^2+1}+1)(y^2-x^3+3x-2)}}} \right.$

Complete each of the following sentences with the correct form of the word in the bracket. 1. Daniel is very interested in history and (archaeologist)......................,and often visits historic sites. 2. They are doing some (archaeology)..........excavations at the site 3. She wanted to be an (archaeology)................in her youth. 4. He escaped from (real).......................by going to the cinema every afternoon 5. The special effects were so (real)..................that all the viewers couldn't take their eyes off the screen. 6. They finally came to a mutually (benefit)..................agreement. 7. Most skin cancers are completely (cure)....................but some can be fatal. 8. We were informed sha has a rare,(cure)....................disease 9. The (discover)............................that bees can communicate with each other is (fascinate)................

II.Choose the word or phrase that best completes each unfinished sentence below. 1. Presents in colored paper and put under the Christmas tree. A.are wrapped B. are wrap C. are wraped D. are wrapping 2. Tom likes . He spends lots of hours watching the birds. A. bird-watching B. bird-watch C. watch-bird D. watching-bird 3. Greg me that he liked rock music. A. said to B. told to C. asked D. explained 4. Sally is quite keen the idea. A. in B. on C. of D. for 5. Milk cows and goats. A. belongs to B. comes from C. is made of D. is made from 6. is a religious song that people sing at Christmas. A. Carol B. Poem C. Christmas card D. Patron saint 7. Galileo said that the earth round. A. was B. were C. has been D. was being 8. They recently returned Paris from London. A. to B. for C. towards D. Ø 9. Could you talk ? A. more quiet B. quieter C. quietlier D. more quietly 10. I thanked myclassmate helping me with my homework. A. for B. about C. of D. Ø 11. Halloween is the night of 31st October, when peopleonce believed that ghosts. A. can see B. can be seen C. could see D. could be seen 12. She me she didn’t know what to do. A. said B. told C. asked D. suggested 13. Anita is fond playing the piano. A.in B. on C.of D. for 14. The fire is made matches or lighters. It is made in the traditional way. A. with B.without C. of D. by 15. She seems very today. A. sleepy B. sleepily C. happily D. seriously 16. Ten countries participated in the discussions. A.took part in B. held C. went to D. arranged 17. The journey from the airport to the university about half an hour. A.spends B.takes C. want D. passes 18. is a saint regarded as protecting a particular person or place. A.Patron saint B. Blessed saint C. Holy saint D.Fairygodmother 19. The festival was held in the communal house yard. A. rice-cook B.rice-cooker C. rice-cooking D. rice-cooked 20. I that I didn’t know what to do. A. said B. told C. asked D. suggested Unit 6 FOLK TALES II.Choose the best answer A, B, C or D. 1. My dad doesn’t mind .................... my mom from work every day. A.pick up B.picked up C.picking up D. picks up 2. Using computers too much may have harmful effects .................... your mindsand bodies. A.on B.to C.with D. onto 3. I love the people in my village. They are so .................... and hospitable. A. friendly B.vast C.slow D. inconvenient 4. The .................... people in the village are very friendly. A. ethnic minority B. majorities C.ethnic minorities D. ethnic cultures 5. Can you speak English .................... My English is not good. A. slow B.more slowly C. quickly D. more quickly 6. Viet Nam is .................... multicultural country with 54 ethnic groups. A. a B.an C.the D. A and C 7. Which ethnic groups have the largest population in Viet Nam? A. Kinh B.Muong C.Tay D. Hmong 8. The Lao are one of .................... many Thai- speaking peoples. A. the B. a C. an D. A and C

giả sử có 10 tế bào của cơ thể ruồi giấm đực tiến hành nguyên phân liên tiếp 5 lần. Tất cả các tế bào con tiếp tục giảm phân để tạo giao tử . Hãy xác định a) Số NST mà môi trường nội bào cung cấp cho nguyên phân và giảm phân c) Số lượng giao tử được tạo ra