thui các cậu ấy đùa mà cứ ...

300 ban nha

Cách tính diện tích hình thang là ( đáy bé  + đáy lớn ) x chiều cao : 2 

Công thức : ( đ bé + đ lớn )  x ch cao : 2 

Kết bạn với mình nhé .

1. i/ heard/ you/ buy/ new car/ before/ get/ job.

=> I heard that you had bought a new car before you got the job
2. it/ waste/ money/ buy/ things/ you/ don't need

=> It is waste money to buy things which you don't need.

\(\frac{6.\left(6-1\right)}{2}=15\) ( đường thẳng )

1.Trung and his brother like__reacting____ movies very much. ACT

2. Bell experimented with ways of transmitting__speech____over a long distance. SPEAK

3. Bell___successfully___demonstrated his invention. SUCCESS

4. Mr. Phong made an___arrangement___to see us at two o'clock. ARRANGE

5. Thomas Waston was Bell's__assistant____, wasn't he? ASSIST

1. Although she performed well, she didn't receive good comments from critics

-> Despite her .....good performance, she didn't receive good comments from critics .......

2. Is your scooter white, Peter?

-> Is the..........

3. In spite of her intelligent, she cannot answer the questions

-> Although .....she is intelligent,she cannot answer the questions ......

4. Despite of her English name, she is in fact a Vietnamese

-> Although .....her name is English, she is in fact a Vietnamese .......

5. My father ............................ the bus to work everyday, but I cycle

A. catches B. drives C. goes D. runs

6. ............................. the story of the film was good, I didn't like the acting

A. Because B. Since C. As D. Although

7. They ............. that we have gone without telling them

A. thought B. are thinking C. will be thinking D. think

8. A. naked /id/ B. cooked C. booked D. walked (chọn cách phát âm)

9. These students rarely go to school on time, ...do they...?

10. There was nobody at the meeting when you came,......were they.......?

11. That must be a stunning view,......mustn't it.....?

12. I am the best thing that ever happened to you,.....aren't I........?

13. Let us use the telephone, ........shall we.........?

14. Let me help you do it,.......shall I........?

15. I'm not that bad at Literature,....am I..........?

16. Everyone has your feathers, .......don't they.......?

17. No in this room is able to get an A+, ....are they........?

18. One can't live without water,.....can they........?

19. Go out with me,.......will you ......?

20. Don't take it,.........will you ...............?

21. I wish to study English,.........don't I............?

22. They must study hard,.........mustn't they.............?

23. You mustn't come late,....must you .........?

24. He must be a very intelligent student,..........mustn't he............?

25. You must have stolen my bike,.......mustn't you ........?

I. Em hãy nhìn vào những từ gợi ý dưới đây để viết câu hoàn chỉnh với "going to" ở thể khẳng định hoặc phủ định.

1a. My father/ go on/ diet. (khẳng định)

=> My father is going to go on a diet

1b. He/ drink/ so much beer. (phủ định)

=> He isn't going to drink so much beer

2a. My mother/ take/ more exercise. (khẳng định)

=> My mother is going to take more exercise

2b. She/ work/ so hard. (phủ định)

=> She isn't going to work so hard

3a. I/ have/ haircut. (khẳng định)

=> I am going to have my haircut

3b. I/ watch/ so much/ TV. (phủ định)

=> I am not going to watch so much TV

4a. My sister/ tidy/ bedroom. (khẳng định)

=> My sister is going to tidy the bedroom

4b. She/ talk/ phone for hours. (phủ định)

=> She isn't going to talk and phone for hours

5a. We/ be/ nicer/ each other. (khẳng định)

=> We are going to be nicer each other.

5b. We/ argue/ each other. (phủ định)

=> We are going to argue with each other

Với p=3 thì 2p+1 =7, 4p+1 = 13 là các số nguyên tố 

Với p>3 

* Do p nguyên tố nên ko chia hết cho 3 
Nếu p = 3k +1 => 2p + 1 = 6k +3 chia hết cho 3 
=> ko tồn tại số nguyên tố dạng 3k+1 

Nếu p = 3k +2 => 4p + 1 = 12k +9 chia hết cho 3 
=> ko tồn tại số nguyên tố dạng 3k+2 

Vậy p=3 là duy nhất