có rồi :v đi

Câu 1 : Do các phân tử không khí và nước luôn có khoảng cách và chuyển động hỗn độn không ngừng về mọi phía, nên các phân tử không khí len lỏi vào nước (hiện tượng khuếch tán )

Câu 2 : Tác dụng của việc mặc nhiều áo trong mùa lạnh là để giữ nhiệt cho cơ thể. Nếu mặc cùng một lúc nhiều áo mỏng sẽ tạo ra được các lớp không khí khác nhau giữa các lớp áo, các lớp không khí này dẫn nhiệt rất kém nên có thể giữ ấm cho cơ thể tốt hơn.

#Ai_do_giup_minh_mon_ly_di

a = 24

b = 25 

c = 25 

Câu 4 :

 So sánh:

a) 4 và 2√3 ;            b) -√5 và -2

11. B

12. A

13. B

14. A

15. D.

16. B

17. D.

18. C

19. B

20. D

21. D

22. A

23. B

24. B

25. B

26. B

27. D

28. D

29. C

30. D

Không biết có đúng không nha.

1. This flower is watered every morning by my father.

2. Fiona was invited to John’s birthday party last night by him.

3. The dinner is being prepared in the kitchen by her mother.

4. Our teeth should be cleaned twice a day.

5. The E. grammar have been explained by our teachers.

6. The accident in this city was caused by some drunk drivers.

7. Tom’s parents will be visited by him next month.

8. Can this bike be repaired by you ?

9. Was this beautiful dress made by Mary ?

10. These old pictures in the living room won’t bee hung by me.

11. This factory was not built by the German during Second World War.

12. This house and these cars are going to be painted by the Greens for Christmas Day.

13. The cats were fed by Ann before she went to the cinema.

14. This problem haven’t been discussed by the students last week.

15. Have the most valuable painting in the national museum been stolen by the thieves ?

16. The new president will be interviewed by some people on TV.

17. Football was beeing watched this time last night by Tom.

18. Are those shoes going to be repaired by you ?

19. His nose has been broken in a football match.

Have above sentences been finished by you

6.

1. quietly

2. heavily

3. careful

4. perfectly

5. recently

6. slow

7. well

8. nice

7.

2. fancy

3. delicious

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions

__________is the existence of a large number of different kinds of animals and plants which make a balanced environment

A. extinction

B. biodiversity

C. habitat

D. conservation