Câu 11:  Treo một kim nam châm gần ống dây (hình bên).

Hiện tượng gì sẽ xảy ra với kim nam châm khi ta đóng khoá K?

Câu 8: Cho mạch điện như hình vẽ: Khi đóng khóa K kim nam châm bị hút vào ống dây.   

a) Hãy vẽ các đường sức từ bên trong ống dây và chiều các đường sức từ.

b) Xác định từ cực của ống dây và kim nam châm .

c) Nêu các cách để làm tăng từ trường của ống dây. 

mn giúp mik vs ạ

nêu 8 giải pháp phát triển thủy sản bền vững

(mn giúp mik vs,mik cảm ơn)

Bài 1: Complete the sentences with the correct form of “used to” and the verb in bracket.

1. ..................................(you/ enjoy) Maths at school?

2. I .................................(not like) flying, but I love it now.

3. We .............................(be) friends, but we don’t get on now.

4...................................(John/ work) for IBM before he came here?

5. Winters ...........................(not/ be) as cold as they are now.

6. She  ............................(live) with her mother, but now she lives with her father.

7. I .............................(not do) any exercise.

8..............................(he/ play) for Manchester United?

Mn giúp mik nhoa!

V. Choose the sentence that has the same meaning as the first.

      1.   As soon as I receive my result, I will phone you.

            A. I will ring you the moment I receive my result.

            B. Sooner or later after I receive my result, I will give you a ring.

            C. After receiving my result, I will call you.

            D. I will make a phone call to you when I get my result.

      2.   When I was a young girl, chocolate was one of my favourites.

            A. When very young, I like eating chocolate cakes.

            B. Chocolate used to be a favorite of mine when I was a young girl.

            C. My favourite was chocolate as was a little girl.

            D. Being a little girl, I like chocolate.

      3.   I haven’t seen my aunt for years.

            A. I haven’t meet my aunt for long ago.

            B. The last time I met my aunt was since years ago.

            C. I last saw my aunt years ago.

            D. I didn’t see my aunt years ago.

      4.   I think it’s necessary to tell Tim about it at once.

            A. Tim may be told about it at once.

            B. Tim might be told about it at once.

            C. Tim must be told about it at once.

            D. Tim should be told about it at once.

      5.   It is essential that we meet him at the airport.

            A. He must be met at the airport.              

           B. He might be met at the airport.

           C. He should be met at the airport.         

           D. He may be met at the airport.

giúp mik với

IV. Put the words and phrases in the right order to make meaningful sentences. 

      1... takes/ art/ half/ gallery/ only/ hour/ to/ an/ the/ It/ to/ get.

      ......................................................................................................................................

      2... mine/ book/ Her/ from/ is/ different.

      .....................................................................................................................................

      3... playing/ young/ brother/ the/ very/ piano/ My/ when/ was/ enjoyed/ he.

      ..................................................................................................................................

      4... are/ I/ as/ as/ not/ thought/ These/ expensive/ clothes.

      .................................................................................................................................

      5... new/ is/ next/ A/ to be/ going/ school/ built/ year/ here.

      .....................................................................................................................................

1.   Drivers have to      their seatbelt whenever they drive.

            A. put                  B. tie                       C. fasten                      D. put on

      2.   We should wait for the traffic lights                before we cross the street.

          A. turn green        B. to turn green      C. turn yellow     D. to turn yellow

      3.   All of us have to obey             strictly.

            A. traffic rules             B. traffic                C. traffic jam           D. regular

      4.   Cyclists and motorists have to wear a             when they ride a motorbike.

            A. hard hat              B. cap                   C. mask                      D. helmet

      5.   He forgot to give a                   before he turned left and got a ticket.

            A. signal                 B. sign                         C. light                      D. hand

      6.               does it take you to get to Ho Chi Minh City by plane? - About 2 hours.

           A. How far              B. How much        C. How long          D. How many

      7.   There                a bus station in the city centre, but it has been moved to the suburbs.

            A. used to be        B. used to have       C. use to have          D. were

      8.   I            marbles when I was young, but now I didn’t.

            A. play      B. used to play      C. have played    D. didn’t use to play

      9.   “          is it from your house to the nearest bus stop?” - “About 50 meters’

            A. How far       B. How long                C. How often           D. How much

      10. We should                    the street at the zebra crossing.

            A. walk           B. walk on              C. walk through          D. walk across

      11. Lan used to go to school                     .

            A. with bicycle            B. by foot            C. in car                D. by bus

      12. Public              in my town is good and cheap.

            A. transport                 B. tour                 C. journey           D. travel

      13. _______ is not very far from here to the city center.

            A. That                        B. This                     C. It                     D. There

      14. When there is a traffic jam, it             me a very long time to go home.

            A. costs                B. takes                 C. lasts               D. spends

      15. Mai’s dad usually drives her to school            her school is very far from her house.

            A. but                B. though                   C. because                   D. or

      16. Yesterday Hoa and Lan           round West Lake. It took them an hour.

            A. cycle                 B. cycles                  C. cycling                    D. cycled

      17. Minh used to                his homework late in the evening.

            A. does                      B. do                        C. doing                      D. did

      18. If people                       the rules, there are no more accidents.

            A. follow                B. take care of             C. obey          D. remember

      19. You should                   right and left when you go across the roads.

            A. see              B. look                        C. be                            D. take

      20. Hurry up or we can’t                the last bus home.

            A. keep                        B. follow                     C. go                  D. catch

mọi ng` giúp mik với