user-avatar
phongdiep24112004
1 năm trước
Khi đang lái xe trên đường bằng bạn nhìn thấy 1 ngọn núi trước mặt. Tại thời điểm đó , góc nâng với đỉnh núi là 30 độ . Sau khi lái thêm 1,4 km tới gần ngọn núi thì giá trị góc nâng tăng lên thành 45 độ . Tính chiều cao xấp xỉ của ngọn núi( làm tròn đến mét)
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

làm hộ em với ạ A. PHONETICS Find the word which has different sound in the part underlined: 1. A. funny B. lunch C. sun D. computer 2. A. photo B. going C. brother D. home 3. A. school B. teaching C. chess D. chalk 4. A. cold B. volleyball C. telephone D. open 5. A. meat B. reading C. bread D. seat 6. A. writes B. makes C. takes D. drives 7. A. never B. often C. when D. tennis 8. A. Thursday B. thanks C. these D. birthday 9. A. advice B. price C. nice D. police 10. A. coffee B. see C. agree D. free 11. A. city B. cathedral C. central D. cinema 12. A. every B. prepare C. relative D. helping 13. A. chat B. peach C. chocolate D. chemistry 14. A. leave B. break C. repeat D. peaceful 15. A. money B. close C. most D. judo B. VOCABULARY AND GRAMMAR II. Read the definition and write the words. (1m) 1.This person is always doing a lot of work. ------------------------ 2.This person likes talking very much. ------------------------ 3.It is a large picture printed on paper and you put it on a wall as decoration.------------------------ 4.It has many letters and words. You use it to look up new words. ------------------------- 5.This person likes sports and doing sports. ------------------------- III. What are these places? Write the words in the spaces 1. It is a place where we go to buy stamps or send mail. ------------------------- 2. It is a place where we borrow books. ------------------------- 3. It is a place where we watch a film. ------------------------- 4. It is a place where we go to walk, play and relax. ------------------------- 5. It is a place where we can look at paintings. ------------------------- IV. Put the verbs in brackets in the correct tense form 1. School(finish)---------------- at 4.30 pm every day. 2. ------------you often (eat) -------lunch in the school canteen? 3. Listen! -------------they (sing) ---- in the classroom? 4. My family kike (spend) our summer holidays at the seaside. 5. She (have) ------------- long black hair. 6. My father (be)------------- very kind. 7. I (go)------------ to the cinema with my sister this evening. 8. What ---------- your brother (do)-----------now? He (practice)-------- speaking English.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team