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dolongtit
2 năm trước
cho hình chóp SABCD có đáy là hình thoi cạnh a và góc abc=60 độ. Hình chiếu của S lên(ABCD) trùng vs trọng tâm Δ ABC và SB=a. Tính sin(SB,SCD))
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giải giùm mình đi thanks II. Wordform : 1. Tet is the most important _________________ in Viet Nam. (celebrate) 2. Fruit’s festival in Suoi Tien Park is a very _________________ activity. (joy) 3. Look at the _________________ bulbs. They are so beautiful. (color) 4. My _________________ are so strong that the word “love” can’t describe them. (feel) 5. There are a lot of _________________ at tourist attractions in Ho Chi Minh City. (sightsee) 6. He felt _________________ because he lost the match. (disappoint) 7. She drives _________________, so she has never caused an accident. (care) 8. Teachers now give _________________to their students in classroom activities . (free) 9. One of the most important _________________ for Vietnamese people is Tet or the Lunar New Year holiday. (celebrate) 10. New Year’s Day is a national _________________, so people don’t have to go to work. (festive) 11. The streets are filled with a _________________ atmosphere when Christmas day comes. (joy) 12. Do you usually put up Christmas _________________ in your house? (decorate) 13. _________________, the meat associated with Easter is lamb. (tradition) 14. Passover, the “festival of _________________ freedom”, is celebrated by Jewish people. (free0 15. They often take part in charity _________________ organized by their church. (act) 16. One cause of the American Civil War was the issue of _________________. (slave) 17. The _________________ Easter Parade has become a popular tradition for Easter Sunday in New York City. (color) 18. Emily has made over 25 films in her career. She started _________________ at the age of 14. (act) 19. The campaign against air polution was organized by a famous environmental _________________. (act0 20. Mai used to be an _________________ student. She often took part in many class activities. (act) 21. What homless people need is love, _________________, and help. (kind) 22. He is very _________________ towards his friends. – he always tries to help if one of them has problem. (consider) 23. Bob was _________________. He gave away a _________________ sum of money to charity before he died. (generosity/ consider) 24. After graduation, my _________________ is to earn enough money to support my family. (prior) 25. The actor is an amusing one. TV audiences like his sense of _________________ (humorous) 26. I’m so _________________ of my father. How efficient and considerate he is!(pride) 27. I hardly know him. He is an _________________ of mine. (acquaint) 28. Many _________________ activities take place in different parts of Vietnam at tat. (culture) 29. As a _________________, I find the celebrations for this holiday strange and interesting. (tour) 30. Justine is a _________________ friend. He can keep your secrets from other people. (trust0 31. I’m _________________ with your _________________ for Tet, which aren’t going according to plan. (satisfy/ prepare) 32. Snow in April is an unusual _________________ in this area. (occur) 33. The police took immediate _________________ when they realized the situation was impossible to control. (act)

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