Cho V(L) khí CO2( đktc) vào dd nước vôi trong 13,32g Ca(OH)2, kết thúc phản ứng dc 12g kết tủa. Xác định giá trị của V

Giúp mk với ạ !!! Cảm ơn trước ...

1. She has to work today -> 2. I agreat buying this book -> 3. What a pity she didn't understand the question -> 4. We want to have a cup of iced tea -> 5. He is regretful now. He was lazy for the exam

Chứng minh rằng nếu 1/a+1/b+1/c=2 và a+b+c=abc thì ta có 1/a^2+1/b^2+1/c^2=2

70. I / ruler / a back / and white / have ; ............................................. 71. is on / my / the third / floor . / classroom ; ............................................ 72 . he _ _ my brother . 73 . don't ma _ _ noise in class . 74. how many desks ......... in your classroom ? a. is there b . are there c . are those d . are there 75 . is .......... a library at your school ? a. thse b. this c. there d. that 76. two dogs . / a cat / and / my brother / has ; ...................................................... 77. your bedroom ? / books / in / any / Are there ; .................................................. 78. her family n _ _ _ is green . 79 . h _ _ is your mother ? - she 's fine 80. w ___ t is this ? - this is a red marker. 81. ..................... many desks are there in your classroom ? a. how b . what c. who d . which 82. how old is your sister ? ............. is fifteen years old 83. hot / summer ? / Is / it / in ; ....................................................... 84 . likes / baby / my / sweets / brother; ............................................ 85. cr _ _ on. 86. my baby sister í beautifui . ............................ is five years old a. he b. she c. they d. it 87. play football / i / often / with/ my brother ;......................................... 88. she / like / dolls / to play / doesn' t ; ................................................ 89. h _ _ name is peter brown . 90 . the book s are _ _ the table . 91. goodbye , see ............... later 92. put on your coat ...... you ' ll get cold . a. but b. or c. and d. so 93. how many / does / have ? / apples / your sister ; ............................................. 94. now . / the computer / in / we are / room ; ...................................................... 95. be qu _ _ _ t plaease . 96 .the woman __ teacher . alice. 97 . which are your favourite toys , dolls ........ robots ? a. and b. for c. or d . at 98. what do you at break time ? play chess a. does b. is c. are d. do 99 . peter / you / see / tomrrow ; .......................................................................

tính rút gọn cho mik câu này 40 điểm

:𝘃 𝗚𝗶𝘃𝗲 𝘁𝗵𝗲 𝗰𝗼𝗿𝗿𝗲𝗰𝘁 𝗳𝗼𝗿𝗺 𝗼𝗳 𝘁𝗵𝗲 𝘄𝗼𝗿𝗱 𝗶𝗻 𝗯𝗿𝗮𝗰𝗸𝗲𝘁𝘀. 1. It took me 2 hours _______ (buy) the clothes and shoes. 2. Do you have any money ________ (pay) for the hat? 3. Would you like ________ (visit) my grandparents in Paris? 4. Don’t waste her time ___________(complain) about her salary 5. That questions need ___________ (reply). 6. Viet is used to ________ (cry) when he faces his difficulties. 7. It’s time they stopped ______ (work) here. 8. Will she remember _______ (collect) his suit from the dry – cleaners or shall do it 9. Jim forgot ________ (send) this message last night. 10. Hung stopped ______ (eat) meat yesterday. (trl đúng & ko chép mạng thì đc chọn "câu trl hay nhất" :v)

qua hình tượng nhân vật Thánh gióng em hãy viết một đoạn văn để nêu cảm nhận của em về vẻ đẹp của nhân vật

giúp mình nhé x ²+y ²+z ²-xy-yz-zx ≥1 với x,y,z ≥0 và x ≥y;x ≥z;x ≥1 điểm rơi x=1 ;y=z=0

Ai giúp mình với III. Choose the correct option A,B,C or D to complete the sentences. 6. A person who . . . . . the bagpipes is called a piper. ​A. plays​​B. performs​​C. entertains​​D. does 7. Don’t drink that water. It’s . . . . . ​A. damaged​​B. dumped​​C. contaminated​D. pollution 8. The team’s success was largely . . . . . to her efforts. ​A. because​​B. due​​​C. since​​D. as 9. We don’t have many carnivals in Vietnam; . . . . ., we have many traditional festivals. ​A. nevertheless​B. while​​C. although​​D. because 10. When I came, the whole family . . . . . dinner around a big dining table. ​A. is having​​B. was having​ C. had​​​D. have 11. While she was dancing, the princess . . . . . a witch. ​A. was seeing​ B. saw​​ C. see​​​D. is seeing 12. The government is sending . . . . . to the flood victims. ​A. touch​​B. aid​​​C. accommodation​ D. provision 13. I often drink coffee, but today I . . . . . tea. ​A. am drinking​B. drink​​C. drank​​D. drinks 14. By the time we got to the cinema, the film . . . . . ​A. started​​B. had started​​C. starting​​D. starts 15. All our English teachers are . . . . . speakers. ​A. native​​B. original​​C. foreign​​D. orginally 16. If you were the president, what . . . . . you do to help the environment ? ​A. will​​ B. would​​C. do​​​D. are 17. When she comes later today, he . . . . . the dinner. ​A. cooks​​B. is cooking​​C. will be working​ D. has cooked 18. If the teacher were here now, we’d ask him the difference . . . . “science” and “technology”. ​A. among​​B. of ​​​C. between​​D. for 19. Our teacher says that new technology . . . . . many worker jobless in the future. ​A. makes​​B. is making​​C. will make​​D. has made 20. . . . . . ethnic minority people in the village are very friendly. ​A. a​​​B. the​​​C. an​​​D. θ 21. The song “The road to glory days” . . . . . by Tran Lap is a very popular song. ​A. compose​​B. composed​​C. composing​D. to compose 22. Alexander Graham Bell was a great . . . . ., who invented the telephone. ​A. developer​​B. conservationist​C. scientist​​D. explorer V. Rewrite the sentences so that it stays the same meaning. 28. You should water these flowers regularly. ​These flowers should …………………………………………… 29. “ I have decided to become an astronomer”, he said. ​He said that ………………………………………………………. 30. Let's go abroad for our holiday this year. Why ……………………………………………………………… 31. During dinner, the phone rang. While I …………………………………………………………… VI. Rearrange the words to make meaningful sentences. 32. New York/ the/ but/ is/ city/ the USA/ the/ in/ not/ biggest/capital./ 33. English/ an/language/ Malaysia/ India/ many/ is/ official/ in/ and/ other countries./ 34. English speakers/ increasing/ the/ of/ number/ world/ is/ the/ in/ fast./ 35. whereas/ capital/ of/ the/ London/ of/ Edinburgh/ capital/ England/ the/ is/ is/ Scotland./