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AH
Akai Haruma
Giáo viên
24 tháng 2 2022
Lời giải:
Gọi vận tốc của bác Bình là $a$ km/h thì vận tốc của bác Hà là $a+2$ km/h
Thời gian bác Hà đi đến khi gặp nhau là:
$\frac{BC}{a+2}=\frac{32}{a+2}$ (h)
Thời gian bác Bình đi đến khi gặp nhau là: $\frac{AC}{a}$ (h)
Vì bác Hà đi sau bác Bình 1 h nên:
$\frac{32}{a+2}=\frac{AC}{a}-1=\frac{71-32}{a}-1=\frac{39}{a}-1$
$\Rightarrow a=\frac{1}{2}(5+\sqrt{337})$
Hai bác gặp nhau sau: $\frac{32}{a+2}=\frac{1}{4}(\sqrt{337}-9)$ (h) khi bác Hà khởi hành.
3 tháng 1 2019
Để kéo trực tiếp một thùng nước có khối lượng là 8 kg từ giếng lên , người ta phải dùng lực nào trong các lực dưới đây ?
A. F < 8 N
B. F > 8 N
C . 8 N < F < 80 N
D. F = 80 N
3 tháng 1 2019
1 Kg =10N nên 8Kg = 80N
Loại câu A do 80N > 8N
Loai câu C do 9N < 80N nên không kéo đc
Câu D là hợp lí nhất do F=Fvật=80N
Nên câu D đúng
AA
13 tháng 9 2018
1,"Do you live in London ?"
->She asked me if I lived in London
2, "Did he arrive on time ?"
-> She asked me if he arrived on time
3."Have you been to Paris "?
->She asked me if I had been to Paris
4,"Can you help me?"
She asked me if I could help her
5," Are you working tonight ?"
->She asked me if I was working that night
6, "Will you come later?"
->She asked me if I would come later
7,"Do you coffee ?"
->She asked me if I d coffee
8,"Is this the road to the station ?"
-> She asked me if that was the road to the station
9,"Did you do your homework ?"
->She asked me if I did my homework
10, "Have you studied reported speech before ?"
-> She asked me if I had studied reported speech before
TK MIK NHA<3
NA
12 tháng 9 2018
1, "Where is he ?"
-> She asked me .where he was
2, "Where are you doing ?"
->She asked me ... what I was doing
3,"Why did you go out last night "?
->She asked me . why I went out last night ..
4,"Who was thát beautiful woman ?"
-> She asked me .. who that beautiful woman was
5, " How is your mother?"
-> She asked me. how my mother was
6, :What are you going to do at the weekend ?"
-> She asked me ... what I was going to do at the weekend
7, "Where will you live after graduation ?"
-> She asked me. where I would live after graduation
8,: What were you doing when t saw you ?"
-> She asked me ... what I was doing when t saw me
9, "How was the journey?"
-> She asked me .. how the journey was
10, "How often do you go to the cinema ?"
-> She asked me ... how often I went to the cinema
NN
22 tháng 12 2018
11. He said to me, “I can't do this test”
-> He said to me..............he couldn't do that test............................................................................
12. They said to him, “We’re learning English now”
-> They told him........they were learning english then.................................................................................
13. She said to me, “I will go to China next week”
-> She said to me...........she would go to china the following week..............................................................................
14. They asked him, “Do you like to play this game?”
-> They asked him............if i liked to play that game..........................................................................
15. He said to me, “I must finish these works on time”
-> He told me.........he had to finish those works on time...........................
@Nguyễn Minh Huyền
22 tháng 12 2018
1.He said to me he couldn't do that test
2.They told him we were learning E then
3.She said to me she would go to China the following week
4.They asked him if he liked to play that game
5.He told me he had to finish those works on time
6.She asked me why I had to do that work
7.They asked him if shall we went to the stadium the next day
8.He asked me to that test again
9.The teacher told them not to make noise in class
10.Mary asked me if she could borrow me some money
THEO DÕI MK NHA
6 tháng 8 2020
1. could you please open the door for me ?said the man
--> the man asked me ......if I could please open the door for him...........
2. my teacher said" i think you should take another course"
-->my teacher advised me......to take another course........
3. can you type these documents right now? asked he
--> he asked his secretary.....if she could type those documents right then.......
4. you shouldn't shout so loudly, the boys? said the man
--> the man said....to the boys that they shouldn't shout so loudly.....
5. would you pas me a cirgarette? said he
--> he asked me .......if I would pass him a cigarette..........
6. could you lend me some money,please?
---> she asked me .......if I could lend her some money.........
7. could you buy me an english exercises book? Nam asked Mai
--> Nam asked Mai if she could buy him an English exercises book
8. can you get back home ten o'clock?
--> mom told me....that I should get back home at ten o'clock.....
(câu 8 viết lại là mom asked me if I could get back home at ten o'clock thì ok hơn)
PA
6 tháng 7 2016
1When are you going to have your final exams? Dad asked me.
>>>> Dad asked me I was going to have my final exams.
2. The train had already left before we arrived at the station.
>>> When we arrived at the station, the train has already left.
6 tháng 7 2016
1When are you going to have your final exams? Dad asked me.
>>>> Dad asked me, When are you going to have your final exams........................
2. The train had already left before we arrived at the station.
>>> When we...arrrived at the station the train had already left before?..................
15 tháng 4 2018
1.she wanted to know me what I were doing
2.he wanted to know me if I were going to cinema
3.he wanted to know me what I was the time
4.she asked me when we would meet again
5.she asked him if he were crazy
6.he wanted to know me where they had kived
7.she asked me if I could meet her at the station
CL
8 tháng 9 2017
V/ put into indirect speech
1. He said to me, "i can't do this test "
-> he said to me HE COUDN'T DO THAT TEST
2. They said to him, "we are learning English now'
-> they told him THEY WERE LEARNING ENGLISH THEN
3. She said to me, "i will go to China next week"
-> she said to me SHE WOULD GO TO CHINA THE FOLLOWING WEEK.
4. They asked him, "do you like to play this game "
-> they asked him IF HE LIKED TO PLAY THAT GAME
5. He said to me, "i must finish these works on time "
-> he told me HE HAD TO FINISH THOSE WORKS ON TIME
6. She asked me, "why do you have to do this work?"
-> she asked me WHY I HAD TO DO THAT WORK
7. They asked him , "shall we go to the stadium tomorrow?"
-> they invited him TO GO TO THE STADIUM THE NEXT DAY
8. He said to me, "do this test again, please !"
-> he requested me TO DO THAT TEST AGAIN
9. The teacher said to them, "don't make noise in class "
-> the teacher told them NOT TO MAKE NOISE IN CLASS
10. Mary said to me, "can i borrow you some money? I want to buy this shirt '
- > mary asked me IF SHE COULD BORROW ME SOME MONEY, SHE WANTED TO BUY THAT SHIRT
11. He said to her, "i am doing the test now"
-> he said to her HE WAS DOING THE TEST THEN
12. She said to me, " we study English every day "
-> she told me THEY STUDIED ENGLISH EVERY DAY.
13. He said to them, 'i will go to Dalat tomorrow "
-> he told them HE WOULD GO TO DALAT THE NEXT DAY
14. She asked him, "how old are you? "
-> she asked him HOW OLD HE WAS
15. I asked her, "will you come here next week?"
-> i asked her IF SHE WOULD COME HERE THE FOLLOWING WEEK
16. He said to me, " i must go now"
-> he told me HE HAD TO GO THEN
17. They asked him, "what are you doing? "
-> they asked him WHAT HE WAS DOING
18. She said to me, "open this door, please "
-> she asked me..
19. My father said to me, "don't be late again! "
-> my father asked me...
20. John said, " do you have any shampoo, Alice? I must wash my hair "
-> John asked Alice
18 tháng 7 2017
1, he said to me, You should take a few days off
-->He advised me to take a few days off
2, her teacher said to her, You should improve your pronunciation
--> her teacher advised her to improve her pronunciation
3, She said to me, You ought to keep your body warm
--> She advised me to keep my body warm
4, my teacher said to me, You shouldn't go to school late
-->My teacher advised me not to go to school late
5, he said to me, you had better not stay up late
--> he advised me not to stay up late
18 tháng 7 2017
1. He said to me "You should take a few days off."
=> He told me (that) I should take a few days off.
=> He advised me to take a few days off.
2. Her teacher said to her "You should improve your pronunciation."
=> Her teacher told her (that) she should improve her pronunciation.
=> Her teacher advised her to improve her pronunciation.
3. She said to me "You ought to keep your body warm".
=> She told me (that) I ought to keep my body warm.
=> She advised me to keep my body warm.
4. My teacher said to me "You shouldn't go to school late".
=> My teacher told me (that) I shouldn't go to school late.
=> My teacher advised me not to go to school late.
5. He said to me "You had better not stay up late".
=> He told me (that) I had better not stay up late.
=> He advised me not to stay up late.
27.C
28.B