Đáp án:
Giải thích các bước giải:
Khi thu khí oxi vào bình bằng cách đẩy không khí thì miệng bình phải đặt ngửa lên, vì khí oxi nặng hơn không khí.
$d_{O_2/kk}=\frac{32}{29}=1,1$ $lần.$
chúc bạn học tốt!
I. Chia V 1. My brother (listen)_________________to music in his free time 2. I ( be)_____________tired now. I ( want)_______________some water. 3. Nam ( go)________________to school every day. He ( go)_______________to school now. 4. Look! She ( play)________________soccer. 5. They ( have)__________________a big house. 6. He ( feel)_______________tired now. 11. Ha ( like)_______badminton. She . They (play)____it every Thursday afternoon. They ( play)_______ badminton in the yard now. 12. Which sports she ( play)___________? - She ( play)_______________tennis. She ( play)______________________tennis at the moment. 13. Which sports your sister ( play)__________?- He ( play)________soccer. He ( play)_________now. 14. What Nam ( do)_________________in his free time?- He (jog)_______________. 15. Nam ( go)____________________to the movies every evening. 16. Nga (watch)_______________________TV every evening. 17. Lan( have)____________________noodles for breakfast. 18. He ( read)__________________in the living room everyday. He ( read)______________ at the moment. 19. They ( not watch)____________________ TV now. 20. We always ( play)_____________sports in the afternoon. 21. David ( jog)_______________now. 22. Mr. Hung ( go)______________to the movies once a month. 23. Nam ( want)______________to travel to Vung Tau very much. 24. We ( go)____________________to visit Ha Long Bay next week. 25. Mai and Lan ( go)______________to the zoo once a month. 26. David ( like)_______________swimming in the summer. 27. Phuong ( stay)____________________with her aunt for a week this summer 28. It’s very far from here. Let’s ( go)________________by bus. 29. What about ( visit)_________________him this weekend? 30. What time …………………you ( go ) …………………..to school ? II. Chuyển các câu sau sang thể bị động. 1. The waiter brings me this dish. 2. Our friends send these postcards to us. 3. Their grandmother told them this story when they visited her last week. 4. Tim ordered this train ticket for his mother. 5. She showed her ticket to the airline agent. 6. Jim baked this cake yesterday. 7. They are going to buy a new apartment next year. 8. The shop assistant handed these boxes to the customer. 9. The board awarded the first prize to the reporter. 10. Have you sent the Christmas cards to your family? 11. The committee appointed Alice secretary for the meeting. 12. Tom will give Anna a ride to school tomorrow. 13. They keep this room tidy all the time. 14. We gave Ann some bananas and some flowers. 15. They moved the fridge into the living room.
Bạn nào chuyên toán vào giúp mk với ạ , cần gấp lắm rồi ạ. Hứa sẽ tks hay nhất và 5* ạ
Ở bến cảng người ta dùng cần cẩu để bốc xếp hàng cứ mỗi lần nâng được một congteno 10 tấn lên cao 5m mất thời gian 60 giây a Tính công suất của cần cẩu bê cần cẩu chạy bằng điện với hiệu suất 50% hỏi để bốc xếp 180 congteno thì điện năng tiêu thụ là bao nhiêu
làm hộ mình 2 câu trắc nghiệm này với cần gấp lắm
3. Write the correct form of the –ing/-ed adjectives: 1. I’m always very after a day at work. (tire) 2. It is to meet you here. (surprise) 3. We are very about the upcoming trip on Sunday. (excite) 4. He’s always showing off. It’s really . (annoy) 5. Are you in our new publication? (interest) 6. My friend is a very sort of person but he hates doing activities. (relax) 7. What an actor! He makes the movie wonderful. (amaze) 8. I am with this work. It is the same every day. (bore) 9. Are you with the result? (satisfy) 10. I thought the program on wildlife was I was absolutely . (fascinate)
1. Would you like ___________a message? A. leave B. leaving C. to leave D. left 2. The children are old enough to look after__________ A. ourselves B. themselves C. herself D. himself 3. My father used_________us to the zoo when he was alive. A. taking B. took C. take D. to take 4. They’ll arrive_________Monday, 14 July. A. during B. in C. on D. at 5. Nam hates_________to the market A. going B. goes C. to go D. go 6. The new shopping mall is quite_________the present shopping area. A. the same B.different from C. like to D.similar
cho pt bậc nhất 2 ẩn : 3x-2y=2 có nghiệm là: A.(2;2) B(1;-1) C(-1;1) D(-1:-1)
Viết lại những tên sau cho đúng quy tắc a, tên người : anbe anhxtanh , critxian , anđécxen, iuri gagarin b, tên địa lí : xanh petecbua , tôkio, amadon , niagara
Cho hình chóp sabcd có đáy abcd là hình thang vuông tại a và d, ab=ad=a, cd=2a, sd vuông với abcd, sd=a. Tính khoảng cách từ d đến sbc
Giúp mình nhé đang cần okkok
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