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14 tháng 1

Gọi đáy lớn ad là a, đáy nhỏ bc là b, đường cao là h
Ta có: S tam giác BCD là: (b x h) : 2= 254 (cm2) => b x h = 254 x 2=508(cm) (1)

Có: S hình thang ABCD= ((a+b)x h):2=> (a x h+b x h): 2

                                                mà a=3xb

                                                  =>(3 x b x h+b x h):2   (2)

Từ (1) và (2) ta có: (3 x 508 + 508):2= S hình thang abcd

                             => 2032 : 2 =S hình thang ABCD

                             =>S hình thang ABCD= 1016(cm2)

14 tháng 1

tiếng anh ảo thiệc sự

Rewrite the folowing sentences without changing the meaning of the root ones 1. He couldn't meet you because of being busy(because) 2. She can't work hard because she is very old((because ) 3. She went to bed early because of her sickness(because) 4. He likes her because she is very beautiful (because of) 5. Nobody can do this test because of its difficulty(because) 6. He couldn't go to school because he was very poor (because of) 7. Two cars can't pass each other because of narrow...
Đọc tiếp

Rewrite the folowing sentences without changing the meaning of the root ones 1. He couldn't meet you because of being busy(because) 2. She can't work hard because she is very old((because ) 3. She went to bed early because of her sickness(because) 4. He likes her because she is very beautiful (because of) 5. Nobody can do this test because of its difficulty(because) 6. He couldn't go to school because he was very poor (because of) 7. Two cars can't pass each other because of narrow road(because) 8. We spent the whole day in the garden because of lovely weather (because) 9. I can't buy this bike because i don't have enough money( because) 10. Tom will not pass the examination though he studies well(despite) 11. Despite not having enough money, we decided to have a party (though) 12. He took a lot of photos though the sky was dark( in spite of) 13. Our guests arrived late because of the heavy rain( because) 14. Because of his friend's absence, he had to copy the lesson for her( because) 15. This girl is ignorant because she is lazy(because of) 16. My friend was absent because of his illness(because) 17. Julia doesn't go to school because she is ill( because of her) 18. Although he had a good salary, he was unhappy in his job( in spite of) 19. The little girl crossed the street although the traffic was heavy(in spite of) 20. Not having enough money, i didn't buy the computer(because) 21. Although the weather was very hot, they continued playing football( in spite of) 22. Despite the rain, they went to the football match (although) 23. Kate never learnt Spanish. She lived in Spain for years ( though) 24. I got very wet in the rain. I had an umbrella(although) 25. David smokes. He seems to be in good health (although) 26. Although Nam is not an intelligent student, he can learn very fastb( despite/in spite of) 27. Because Hoa was rich, she could buy that house( because of) 28. Because the rain was so heavy, i couldn't go to school( because of) 29. His father asked him to go stay at home because he was sick(because of) 30. Because there was an accident, i was late(because of) 31. She failed the University entrance exam because her grades were bad( because of)

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27 tháng 1

5. Although he was tired, he had to finish his homework.
6. It is necessary that you practice English every day.
7. Jack recovered quickly from his serious illness.
8. The child's illness is caused by malnutrition.
9. Sarah asked if I could be a member of the English club.
10. Mr. Nam did not go to work yesterday because he did not feel well.
11. I am very interested in his articles on global warming in The Times.
12. I have not seen Jane since we left high school.
13. I have never met a more intelligent person than her.
14. In spite of loving physics, Nariko decided to become a chemistry teacher.
15 .Joan got wet on her way to school this morning because she forgot her raincoat.
16 .My brother wishes he could speak English as fluently as native speakers.
17 .Father's Day is celebrated on the third Sunday of June in many countries.
18 .We were happy when we came back to school after a long time.
19 .She had dinner before going to sleep.
20 .As soon as Linh arrived in Hanoi, she called her friends.

13 tháng 1

go

 

13 tháng 1

I usually go to the park on weekends.

14 tháng 1

pollute

14 tháng 1

pollutant

14 tháng 1

1 .I have never eaten durian before .

2 What is the distance between Phu Thanh Market and Tien Pagoda ?

3. Despite the bad weather , she went out for a walk.

4. Lan dances well.

5. In spite of having a lot of money , they live miserably .

6 .Despite being stormy , they drove to work .

doesn't, eats

had

was, worked

13 tháng 1

khò

13 tháng 1

quá khó