*Định nghĩa khối lượng riêng của một chất? *Định nghĩa trọng lượng riêng của một chất? *Để đo khối lượng riêng của một chất ta làm như thế nào? kể tên các loại máy cơ đơn giản? nêu VD. tác dụng của máy cơ đơn giản?

Các câu hỏi liên quan

Bài 12: Sử dụng tính từ đuôi “ed” hoặc “-ing” tạo thành từ những động từ trong ngoặc để hoàn thành những câu dưới đây. Disappoint Irritate Frighten Surprise Bore Tire Stun Interest Move excite 1. I found the last scene of the movie so ________________ that I was close to tears. 2. The team lost the match and they were ________________ with themselves. 3. We were all surprised by the ________________ view of the mountain. 4. She told me she was very ________________ although she didn’t do anything. 5. I found the way she looks at me very________________. 6. Did you see that horror film? It was so ________________. 7. We’d be ________________ to hear your views on this topic. 8. The history class was very________________. I almost fell asleep. 9. Everyone was ________________ about the upcoming feast. 10. It’s not ________________ that they fail the test. They didn’t study hard. Bài 13: Hoàn thành câu thứ hai sao cho nghĩa không thay đổi so với câu thứ nhất, sử dụng từ gợi ý trong ngoặc. 1. Although there was a traffic jam, me managed to arrive at the train station on time (despite) ………………………………………………………………………………………… 2. I don’t want to buy a new computer although I have enough money. (having) ………………………………………………………………………………………… 3. Both of them usually go to school late although they don’t live far away from school. (spite) ………………………………………………………………………………………… 4. My brother still went to school yesterday although he was sick. (sickness) ………………………………………………………………………………………… 5. Although he looks healthy, he has a weak heart. (looking) ………………………………………………………………………………………… 6. Despite the fact that Louis is not so rich, he often does charity. (although) ………………………………………………………………………………………… 7. In spite of the awful weather, we enjoyed our party last night. (although) ………………………………………………………………………………………… 8. She goes shopping every week although she has many clothes. (having) ………………………………………………………………………………………… Bài 14: Điền “although/ despite/ in spite of” vào chỗ trống để hoàn thành những câu sau. 1. _____________ Peter was not invited to the party, he was the first to come. 2. _____________ he promises he won’t tell lie again, I won’t trust him anymore. 3. This is an old car. _____________, it’s very reliable. 4. I am exhausted after school. _____________, I will help mom do housework. 5. Ted is only 6 years old. He, _____________, can play the piano very well. 6. She bought that sweater _____________ its high price. 7. They rushed to the cinema. _____________, they were too late. 8. _____________Sally hates crowded places, we’ve invited her to the prom. 9. I didn’t like her rude behavior. _____________, I said nothing. 10. _____________ working slowly, he rarely makes mistakes. 11. I do exercise every day. I haven’t lost any weight, _____________. 12. My father tried to lift the box. _____________, it was too heavy. 13. We won the game_____________ having lost two players. 14. I called Jane four times. _____________, she didn’t answer me. 15. He wants to be a famous actor. His parents, _____________, wants him to be a doctor. Bài 15: Dựa vào những từ cho sẵn, hãy viết thành câu hoàn chỉnh. 1. Although/ Anna/ not look/ serious/ she/ worried/ now. ………………………………………………………………………………………… 2. In spite of/ get/ up/ late/ this morning/ I not miss/ the bus ………………………………………………………………………………………… 3. Despite/ have/ no/ money/ we/ go/ shopping/ tomorrow. ………………………………………………………………………………………… 4. Although/ the book/ thick/ Jane/ finish/ it/ yesterday. ………………………………………………………………………………………… 5. Jim/ have/ serious/ car/ accident/ last/ month/ howver/ he/ recover/ quickly. ………………………………………………………………………………………… 6. Although/ I/ fascinated/ to/ know/ the result/ I/ pretend/ I not care. ………………………………………………………………………………………… 7. Jim/ not/ usually/ like/ sci-fi movies/ nevertheless/ this one/ be/ exception. ………………………………………………………………………………………… 8. Although/ it /sunny/ I / bring/ umbrella/ with me. ………………………………………………………………………………………… Bài 16: Khoanh tròn vào đáp án đúng. When I was a kid, my parents (1)________ take me to the movie theater. When I went there for the first time, I was (2)________ how big the screen was. The sound system was awesome (3)________. (4)________ I didn’t remember the exact name of the first movie I watched in the cinema, I remembered that it was a cartoon. During the whole movie, everyone laughed a lot at the (5)________ characters. (6)________, the last scene was so (7)________ that I almost cried. When I grow up, I often go to the cinema with my friends to get (8)________ after hard working hours. 1. A. didn’t B. was C. used to D. were 2. A. amaze B. amazing C. amazed D. amazed 3. A. too B. either C. and D. so 4. A. However B. Although C. Despite D. But 5. A. entertain B. entertaining C. entertained D. entertains 6. A. However B. Although C. Despite D. But 7. A. move B. moving C. moved D. moves 8. A. relax B. relaxing C. relaxed D. relaxes