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2 tháng 2 2017

1.Cho cấu trúc:

Write(1) →→ Wrote(2) →→ Written(3)

Send(4) →→ Sent(5) →→ Sent(6)

Cho câu:

He's already written the email,but he hasn't sent it yet.

Hỏi:

Tại sao lại dùng written ?

=> Là vì câu đó chia ở HTHT (dấu hiệu already)

Từ sent là (5) hay (6) ở câu 1 ( Send ở cột 2 và 3 đều như nhau bn nhé )

2 tháng 2 2017

sent ý ở cột 3 nha bạn.

dù hai cột giống nhau nhưng là ht nên cứ nói cột 3 cho rõ nha

3 tháng 7 2019

1.Our car stopped working on the motorway,so he had to call mechanic.(Down)

⇒⇒We had to call a mechanic when our car........... broke down..................................on the motoway.

2.There are quite a few things i would like to invent!(Number)

⇒⇒There are.............a number of .................................................things that I'd like to invent.

3.Carl described his new mobile phone to me.(Told)

⇒⇒Carl...............told me about.......................................his new mobile phone

4.Remind me to send nigel a letter about our plans(write)

⇒⇒Remind me to...........to write to nigel about...................................our plans

5.katy sent me a text message(Rexeived)

⇒⇒I..................received a text message from........................................Katy

6.I think we should build a new theatre in town(Favor)

⇒⇒I am..........in favour of............................building a new theatre in town.

3 tháng 7 2019

Thanks ~~

Rewrite the following sentences withuot changing their meaning 1, He wrote the letter in two hours \(\rightarrow\) It took .................................................. 2, '' What will you do tomorrow, Ming ? '' He asked \(\rightarrow\) He asked ........................................... 3, They have found oil in the Antarctic. \(\rightarrow\) Oil ......................................................... 4, This bicycle is more expensive than that one . \(\rightarrow\) That...
Đọc tiếp

Rewrite the following sentences withuot changing their meaning

1, He wrote the letter in two hours

\(\rightarrow\) It took ..................................................

2, '' What will you do tomorrow, Ming ? '' He asked

\(\rightarrow\) He asked ...........................................

3, They have found oil in the Antarctic.

\(\rightarrow\) Oil .........................................................

4, This bicycle is more expensive than that one .

\(\rightarrow\) That bicycle is ...................................

5, \(Let^,s\)put the garbage bins around the schoolyard .

\(\rightarrow\) I suggest .................................................

6, The planet is Venus. The planet is closest to the Earth .

\(\rightarrow\) The planet which .....................................

7, They have just sent an ambulance to the school .

\(\rightarrow\) An ambulance .........................................

8, '' What aspect of learning English do you find most difficult ? ''. She asked me.

\(\rightarrow\) She asked ..................................................

9, Minh last wrote to his penper ten months ago .

\(\rightarrow\) Minh \(hasn^,t\) ......................................................

10, No one can anwser the question .

\(\rightarrow\) The question ............................................

0
2 tháng 8 2023

1) \(4FeS_2+11O_2\rightarrow8SO_2+2Fe_2O_3\)

2) \(2SO_2+O_2\rightarrow2SO_3\)

3) \(SO_3+H_2O\rightarrow H_2SO_4\)

4) \(H_2SO_4+K_2SO_3\rightarrow K_2SO_4+H_2O+SO_2\uparrow\)

5) \(SO_2+Na_2O\rightarrow Na_2SO_3\)

6) \(Na_2SO_3+BaS\rightarrow Na_2S+BaSO_3\downarrow\)

7) \(BaSO_3\rightarrow BaO+SO_2\uparrow\)

8) \(SO_2+Ba\left(OH\right)_2\rightarrow BaSO_3+H_2O\)

9) \(H_2SO_4+Na_2SO_3\rightarrow Na_2SO_4+SO_2+H_2O\)

10) \(Na_2SO_4+BaCl_2\rightarrow2NaCl+BaSO_4\)

2 tháng 8 2023

2) có nhiệt độ với xúc tác \(V_2O_5\) nhe. Học tốt >3

8 tháng 4 2020

1. I am brought this dish by the waiter.

2. These postcards are sent to us by our friends

3. This train ticket was ordered for Tim's mother by Tim

4. Her ticket was showed to the airline agent by her

5. A new apartment is going to be bought next year.

6. Have the Christmas cards been sent to your family?

7. Anna will be given a ride to school by Tom tomorrow.

8. This room is kept tidy all the time.

9. Some bananas and some flowers are given Ann by us

10. How was the lost man found by the police?

27 tháng 4 2022

\(1,CH_4+Cl_2\underrightarrow{\text{ánh sáng}}CH_3Cl\\ 2,C_6H_6+Br_2\xrightarrow[t^o]{Fe}C_6H_5Br\\ 3,C_6H_6+Cl_2\underrightarrow{\text{ánh sáng}}C_6H_5Cl\\ 4,2CH_3COOH+CaCO_3\rightarrow\left(CH_3COO\right)_2Ca+CO_2\uparrow+H_2O\\ 5,\left(RCOO\right)_3C_3H_5+3NaOH\rightarrow3RCOONa+C_3H_5\left(OH\right)_3\\ 6,CaCO_3+CO_2+H_2O\rightarrow Ca\left(HCO_3\right)_2\\ 7,2NaHCO_3\underrightarrow{t^o}Na_2CO_3+CO_2\uparrow+H_2O\\ 8,NaOH+SiO_2\underrightarrow{t^o}Na_2SiO_3+H_2O\)

\(9,NaHCO_3+HCl\rightarrow NaCl+CO_2\uparrow+H_2O\\ 10,Cl_2+H_2O⇌HCl+HClO\\ 11,CH_3COOC_2H_5+NaOH\rightarrow CH_3COONa+C_2H_5OH\\ 12,C_6H_6+3H_2\xrightarrow[t^o]{Ni}C_6H_{12}\\ 13,\left(RCOO\right)_3C_3H_5+3H_2O\rightarrow3RCOOH+C_3H_5\left(OH\right)_3\\ 14,\left(-C_6H_{10}O_5-\right)_n+nH_2O\rightarrow nC_6H_{12}O_6\\ 15,CH_3COONa+NaOH\underrightarrow{t^o}CH_4\uparrow+Na_2CO_3\\16, Ca\left(HCO_3\right)\underrightarrow{t^o}CaCO_3+CO_2\uparrow+H_2O\)

\(17,MnO_2+4HCl\rightarrow MnCl_2+Cl_2\uparrow+2H_2O\\ 18,NaHCO_3+NaOH\rightarrow Na_2CO_3+H_2O\\ 19,2C_4H_{10}+5O_2\xrightarrow[men,xt]{t^o}4CH_3COOH+2H_2O\\ 20,2NaOH+Cl_2\rightarrow NaCl+NaClO+H_2O\\ 21,CH_3COOC_2H_5+H_2O\underrightarrow{t^o}CH_3COOH+C_2H_5OH\)

I, Passive voice 1, People speak Chinese in the world. \(\rightarrow\) Chinese ......................................... 2, They make this computer in the USA. \(\rightarrow\) This computer ................................. 3, Who wrote this story ? \(\rightarrow\) Who ......................... 4, We invited fifty people to the party. \(\rightarrow\) Fifty people .................................. 5, What did he write in with ? \(\rightarrow\) What...
Đọc tiếp

I, Passive voice

1, People speak Chinese in the world.

\(\rightarrow\) Chinese .........................................

2, They make this computer in the USA.

\(\rightarrow\) This computer .................................

3, Who wrote this story ?

\(\rightarrow\) Who .........................

4, We invited fifty people to the party.

\(\rightarrow\) Fifty people ..................................

5, What did he write in with ?

\(\rightarrow\) What ................................

6, Someone has broken the vase.

\(\rightarrow\) The vase ...............................

7, The author has written a letter for children.

\(\rightarrow\) A letter .....................................................

8, She has finished the report.

\(\rightarrow\) The report ........................

9, The mailman is deliverling the mail now.

\(\rightarrow\) The mail ................................................

10, Someone is repairing my car at the moment.

\(\rightarrow\) My car .........................................................

11, They were delivering the newspapers.

\(\rightarrow\) The newspapers ..................................

12, The men were holding a big bag.

\(\rightarrow\) A big bag ....................................

13, The teacher can give him good mark.

\(\rightarrow\) He .....................................................

14, I can not learn English every well.

\(\rightarrow\) English ..........................................

15, Someone will choose soft drinks.

\(\rightarrow\) Soft drinks ....................................

1
6 tháng 3 2020

1.Chinese is spoken in the world

2.This computer is made in the USA

3.Who was this story written?

4.Fifty people were invited to the party

6.The vase has been broken

7.The letter has been written for the children by the author

8.The report has been finished

9.The mail is being delivered by the mailman now

10.My car is being repaired at the moment

11.The newspaper were being delivered

12.A big bag were being held

13.He can be given good mark by the teacher

14.English can't be learnt every well

15.Soft drinks will be chosen

6 tháng 3 2020

Cảm ơn bạn

14 tháng 3 2022

1) Fe + H2SO4 --> FeSO4 + H2

2) Zn + 2HCl --> ZnCl2 + H2

3) 2Al + 3H2SO4 --> Al2(SO4)3 + 3H2

4) Zn + H2SO4 --> ZnSO4 + H2

5) Mg + 2HCl --> MgCl2 + H2

6) H2 + CuO --to--> Cu + H2O

7) 2H2 + O2 --to--> 2H2O

14 tháng 3 2022

`->` Đáp án + Giải thích:

1) Fe + H2SO4 --> FeSO4 + H2

2) Zn + 2HCl --> ZnCl2 + H2

3) 2Al + 3H2SO4 --> Al2(SO4)3 + 3H2

4) Zn + H2SO4 --> ZnSO4 + H2

5) Mg + 2HCl --> MgCl2 + H2

6) H2 + CuO --to--> Cu + H2O

7) 2H2 + O2 --to--> 2H2O