Làm giúp mình bài này với
How to make school greener-cleaner
Làm bài luận nha
Mình cần rất gấp,bạn nào giỏi giúp mình với!!!
K
Khách
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Những câu hỏi liên quan
21 tháng 10 2016
Bài 2:
Đặt \(\frac{a}{b}=\frac{c}{d}=k\Rightarrow\begin{cases}a=kb\\c=kd\end{cases}\)
=> \(\frac{5a+3b}{5a-3b}=\frac{5kb+3b}{5kb-3b}=\frac{b\left(5k+3\right)}{b\left(5k-3\right)}=\frac{5k+3}{5k-3}\left(1\right)\)
\(\frac{5c+3d}{5c-3d}=\frac{5kd+3d}{5kd-3d}=\frac{d\left(5k+3\right)}{d\left(5k-3\right)}=\frac{5k+3}{5k-3}\left(2\right)\)
Từ (1) và (2) => \(\frac{5a+3b}{5a-3b}=\frac{5c+3d}{5c-3d}\)
21 tháng 10 2016
Bài 3:
Đặt \(\frac{a}{b}=\frac{b}{c}=\frac{c}{d}=k\)
=> \(\frac{a}{b}.\frac{b}{c}.\frac{c}{d}=k^3\)
=> \(\frac{a}{d}=k^3\) (1)
Lại có: \(\frac{a+b+c}{b+c+d}=\frac{a}{b}=\frac{b}{c}=\frac{c}{d}=k\)
=> \(\left(\frac{a+b+c}{b+c+d}\right)^3=k^3\) (2)
Từ (1) và (2) => \(\frac{a}{d}=\left(\frac{a+b+c}{b+c+d}\right)^3\)
DT
5
NT
0
DT
18 tháng 8 2021
II.
1. a
2. d
3. a
4. d
5. d
6. a
7. d
8. a
9. a
10. b
12. b
13. c
14. b
15. b
16. b
17. d
18. c
19. c
20. b
III.
1. In spite of being a poor student, Tom studied very well.
2. Because of her sickness, Mary could not go to school.
3. Despite the bad weather, she went to school on time.
4. In spite of my sick stomachache, my mother told me to go to school.
5. Because of the big storm, I stayed at home.
6. Despite his bad grades, Tom was admitted to the university.
7. Despite her physical handicap, she has become a successful woman.
8. Although his salary was good, Tom gave up his job.
Today, I will tell you some things to make school greener-cleaner. Firstly, I will ask everyone not to throw rubbish in the school because it is the reason of air pollution. Secondly, I will advise everyone to plant trees and flowers in the school yard. Thirdly, I will ask my teacher to celebrate many activities to protect the environment. Finnaly, I will advise everyone not to damage trees and flowers.... If everyone try to protect the environment, the school will be greener.
- plant some trees
- don't throw trash on the street
- plant some flowers
- don't damage trees
- don't pick flowers
Mẫu ví dụ của mình. Chúc bạn học tốt !