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vovanson304
2 năm trước
Giúp vs ạ Một số tế bào nguyên phân với tốc độ duy trì không đổi qua các lần. Tổng số tế bào con được tạo ra là 32. Trong mỗi lần nguyên phân, tỉ lệ thời gian của các kì trung gian: đầu, giữa, sau: cuối theo thứ tự lần lượt bằng 4: 2,5:2:1:0,5 Biết rằng thời gian nguyên phân của tế bào kéo dài của mỗi chu kì nguyên phân của tế bào kéo dài trong 1 giờ. Hãy xác định a) Số lần nguyên phân của tế bào b) Thời gian của mỗi chu kì nguyên phân c) Thời gian của từng kì trong một lần nguyên phân
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Put the following words in the correct order. 1. The / better / why / boarding / not / kids / to / a / do / you / school /send// ______________________________________________________________________________ 2. Was / not / because / her / job / she / of / inexperience / the / offered // ______________________________________________________________________________ 3. Team / his / took / leader / pride / the / great / in / leadership // ______________________________________________________________________________ 4. Here / of / happy / their / the / working / are / people / most / with / salaries // ______________________________________________________________________________ 5. They / the / was / cats / reached / dogs / when / it / raining / and / town // ______________________________________________________________________________

XIII. Rewrite the following sentences so that the meaning doesn’t change. Write between THREE and SIX words including the given words. 1. It was such a dry cake that I couldn’t eat it. (SO) The cake was _________________________________________ I couldn’t eat it. 2. He went on a picnic although the weather was bad. (SPITE) We went on a picnic _________________________________________ weather. 3. Fifty girls entered the dancing contest last year. (PART) Fifty girls _________________________________________ the dancing contest last year. 4. If we don’t protect the environment, many animals will die. (UNLESS) Many animals _________________________________________ the environment. 5. He didn’t make any noise as he entered the house. (WITHOUT) He entered _________________________________________ any noise. 6. The police are investigating why the man has got unconscious. (LOOKING) The police are _________________________________________ the man has got unconscious. 7. The number of robberies in our area has been increasing rapidly. (INCREASE) There _________________________________________ the number of robberies in our area. 8. She always wears a hat because she wants to avoid the sun. (PROTECT) She always wears a hat _________________________________________ the sun.

III. Choose the word or phrase (A, B, C or D) that best completes the sentence. 5. On Monday, we have a _________ English test. A. forty five-minutes B. forty five-minute C. forty five minutes D. forty five minute 6. You should put the food in a reusable box _________ plastic bag. A. by B. instead of C. because of D. without 7. Don’t forget _________ the light before leaving the room. A. turn off B. turning off C. to turn off D. not to turn off 8. I’d like _________this letter to Ha Noi. A. to send B. sending C. send D. sends 9. Don't forget to buy five _________ of bread! A. bottles B. loaves C. cans D. bars 10. He _________ with his friends in an apartment in Ho Chi Minh City since he_________. A. is living/ came B. has lived/ came C. lived/ came D. lives/ comes 11. _________ silly mistake! A. What B. How C. What a D. How a 12. “How is your sister now, Suzy?” - “She is _________” A. more much worried B. much worried more C. much more worried D. more much worry

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