1. D cooked
2. C catched
3. D bought
4. C was looking
6. D deleted
11. A had seen
12. C listened
15. C haven't met

Bài 3: Tìm lỗi sai.

11. There is two chairs, a table and a bed in her room.

A B C D => are

12. Her house is next the bakery and the drugstore.

A B C D => between

13. From the right of the house, there are flowers.

A B C D => On

14. There are trees and flowers on the park.

A B C D => In

15. In the neighbor, there is a school and a market.

A B C D => neighborhood

Bài 3 :

11 . is -> are

12 . is next -> between

13 . from -> on

14 . on -> in

15 . neighbor -> neighborhood

chon ra tu phat am khac loai :

1. A. hour B. household C. rehearse D. horrible

2. A. hygiene B. energetic C. altogether D. sergery

3. A. oceanic B. decide C. socialize D. delicious

4. A. measure B. breakfast C. appear D. spread

5. A. stomachache B. biology C. worried D. comfortable

\(\frac{a}{b+c+d}=\frac{b}{c+d+a}=\frac{c}{a+b+d}=\frac{d}{a+b+c}=\frac{a+b+c+d}{3\left(a+b+c+d\right)}\rightarrow a=b=c=d\rightarrow\frac{a+c}{b+d}+\frac{a+b}{c+d}+\frac{a+c}{b+d}+\frac{b+c}{a+d}=1+1+1+1=4\)

\(A=\frac{a+c}{b+d}+\frac{a+b}{c+d}+\frac{a+c}{b+d}+\frac{b+c}{a+d}=1+1+1+1=4\)

A=4

 Có thể tham khảo câu hỏi tương tự

gia trị biểu thuc A = 1

ai tick mik đến 210 mik tick cho cả đời

1 You should improve your pronounciation

→ Your pronounciation should improve

2 They have found life on that planet

→ Life. have been found on that planet

3 The beauty of the city impressed me a lot 

→ I was impressed by .The beauty of the city a lot

4 He will meet me at Lan's house

→ I will be met at lan's house

5 My mother drinks coffee everyday

→ Coffee is drunk by my mother everyday.

Click để xem thêm, còn nhiều lắm!

Bài của bạn: Cho thêm điều kiện của a;b; c; d; e

Bổ sung thêm: Cho a; b; c;d; e là số tự nhiên thỏa mãn .....

+) Nếu một trong 5 số a; b; c;d;e bằng 1 . Giả sử a = 1 => a^b = 1 => c = 0 hoặc b = 1

Nếu c =0 => c^d = 0 \(\ne\) b^c = 1 . Vậy b = 1. Tiếp tục, ta suy ra c = d = e = 1

Vậy a = b = c = d = e (= 1)

+) Nếu các số đều > 1: 

Tham khảo bài Lê Chí Cường 

Chú ý : a > b => a^b > b^b đúng nếu a > b > 1 

Giả sử a>b=>a^b=b^c>b^b=>c>b

=>b^c=c^d<c^c=>d<c

=>c^d=d^e>d^d=>e>d

=>d^e=e^a>e^e=>a>e

=>e^a=a^b>a^a=>b>a=>Trái giả thiết(loại)

Giả sử a<b=>a^b=b^c<b^b=>c<b

=>b^c=c^d>c^c=>d>c

=>c^d=d^e>d^d=>e>d

=>d^e=e^a<e^e=>a<e

=>e^a=a^b<a^a=>b<a=>Trái giả thiết(loại)

=>a=b(vì a<b và a>b đều trái giả thiết)

=>a^b=b^b=b^c=>b=c

=>b^c=c^c=c^d=>c=d

=>c^d=d^d=d^e=>d=e

=>a=b=c=d=e

Vậy a=b=c=d=e

Bn dùng cái link này nhé!Có thể tra trọng âm đó

http://lingorado.com/ipa/

Choose the word which has a different stress pattern from the others:

1. A. renewable. B. environment. C. eco- friendly. D. abundantly​

2. A. Malnutrition. B. Supersonic. C. Underwater. D. Intelligent

3. A. Comfort. B. Spacious. C. Traffic. D. Resource

4. A. Industry. B. Density. C. Consider. D. Million

5. A. Homeless. B. Describe. C. Skyscraper. D. Violence

Chúc bn hx tốt!

c

d

d

c

b

6. I like playing soccer. - _________.

A. So do I B. So am I C. Neither do I D. I am, too

7. My new bag is quite _________ your bag.

A. the same B. like to C. similar D. different from

8. Who made this cake, Mom? - I _________ made it.

A. my B. mine C. myself D. me

9. I prefer riding a bike _________ driving a car.

A. than B. to C. with D. for

10. Would you mind not using your phone here? - _____________________

A. No, of course not. B. No, I’m afraid not. C. No, I can’t. D. I’d rather you didn’t.

11. Do you need any help? - _________

A. You’re welcome. B. Thanks, I don't need. C. Yes, I need. D. That's very kind of you.

12. I don't know how _________ this game.

A. play B. played C. to play D. playing

13. This is a very popular TV program. Every week it _________ by millions of people.

A. will be watched B. is being watched C. is watched D. was watched

14. He told me that he _________ a plumber.

A. is B. will be C. was D. has been

15. Tim’s teacher asked him to spend more time _________ his Spanish pronunciation.

A. in B. of C. at D. on

16. I am looking forward to _________ you again.

A. see B. seeing C. be seeing D. be seen

17. Susan works very _________, so she always gets good marks.

A. badly B. good C. hardly D. hard

18. Nhung is _________ in reading picture books.

A. interest B. interesting C. interested D. interestingly

19. Will you pick me _________ after the party?

A. on B. over C. up D. through

20. Jane is the _________ of the three girls.

A. prettier B. prettiest C. pretty D. prettily

21. I like my uncle’s house. It is a _________ .

A. new beautiful house B. beautiful new house C. beautiful house new D. new house beautiful

22. Charles is _________ to ride a motorbike to school.

A. not old enough B. old not enough C. enough old not D. enough not old

23. Our _________ resources are limited, so we should recycle all used things.

A. nature B. natural C. naturing D. naturally

24. The team ________ by an experienced rice cook won the rice – cooking contest.

A. led B. leads C. leading D. lead

25. It’s difficult ________ this work in 2 hours.

A. to finish B. finish C. finishing D. finished

6. I like playing soccer. - _________.

A. So do I B. So am I C. Neither do I D. I am, too

7. My new bag is quite _________ your bag.

A. the same B. like to C. similar D. different from

8. Who made this cake, Mom? - I _________ made it.

A. my B. mine C. myself D. me

9. I prefer riding a bike _________ driving a car.

A. than B. to C. with D. for

10. Would you mind not using your phone here? - _____________________

A. No, of course not. B. No, I’m afraid not. C. No, I can’t. D. I’d rather you didn’t.

11. Do you need any help? - _________

A. You’re welcome. B. Thanks, I don't need. C. Yes, I need. D. That's very kind of you.

12. I don't know how _________ this game.

A. play B. played C. to play D. playing

13. This is a very popular TV program. Every week it _________ by millions of people.

A. will be watched B. is being watched C. is watched D. was watched

14. He told me that he _________ a plumber.

A. is B. will be C. was D. has been

15. Tim’s teacher asked him to spend more time _________ his Spanish pronunciation.

A. in B. of C. at D. on

16. I am looking forward to _________ you again.

A. see B. seeing C. be seeing D. be seen

17. Susan works very _________, so she always gets good marks.

A. badly B. good C. hardly D. hard

18. Nhung is _________ in reading picture books.

A. interest B. interesting C. interested D. interestingly

19. Will you pick me _________ after the party?

A. on B. over C. up D. through

20. Jane is the _________ of the three girls.

A. prettier B. prettiest C. pretty D. prettily

21. I like my uncle’s house. It is a _________ .

A. new beautiful house B. beautiful new house C. beautiful house new D. new house beautiful

22. Charles is _________ to ride a motorbike to school.

A. not old enough B. old not enough C. enough old not D. enough not old

23. Our _________ resources are limited, so we should recycle all used things.

A. nature B. natural C. naturing D. naturally

24. The team ________ by an experienced rice cook won the rice – cooking contest.

A. led B. leads C. leading D. lead

25. It’s difficult ________ this work in 2 hours.

A. to finish B. finish C. finishing D. finished

6. I like playing soccer. - _________.

A. So do I B. So am I C. Neither do I D. I am, too

7. My new bag is quite _________ your bag.

A. the same B. like to C. similar D. different from

8. Who made this cake, Mom? - I _________ made it.

A. my B. mine C. myself D. me

9. I prefer riding a bike _________ driving a car.

A. than B. to C. with D. for

10. Would you mind not using your phone here? - _____________________

A. No, of course not. B. No, I’m afraid not. C. No, I can’t. D. I’d rather you didn’t.

11. Do you need any help? - _________

A. You’re welcome. B. Thanks, I don't need. C. Yes, I need. D. That's very kind of you.

12. I don't know how _________ this game.

A. play B. played C. to play D. playing

13. This is a very popular TV program. Every week it _________ by millions of people.

A. will be watched B. is being watched C. is watched D. was watched

14. He told me that he _________ a plumber.

A. is B. will be C. was D. has been

15. Tim’s teacher asked him to spend more time _________ his Spanish pronunciation.

A. in B. of C. at D. on

16. I am looking forward to _________ you again.

A. see B. seeing C. be seeing D. be seen

17. Susan works very _________, so she always gets good marks.

A. badly B. good C. hardly D. hard

18. Nhung is _________ in reading picture books.

A. interest B. interesting C. interested D. interestingly

19. Will you pick me _________ after the party?

A. on B. over C. up D. through

20. Jane is the _________ of the three girls.

A. prettier B. prettiest C. pretty D. prettily

21. I like my uncle’s house. It is a _________ .

A. new beautiful house B. beautiful new house C. beautiful house new D. new house beautiful

22. Charles is _________ to ride a motorbike to school.

A. not old enough B. old not enough C. enough old not D. enough not old

23. Our _________ resources are limited, so we should recycle all used things.

A. nature B. natural C. naturing D. naturally

24. The team ________ by an experienced rice cook won the rice – cooking contest.

A. led B. leads C. leading D. lead

25. It’s difficult ________ this work in 2 hours.

A. to finish B. finish C. finishing D. finished

hãy so sánh a/b,c/d với a+d/b+c nhé

mk viết nhầm