a. Ý nghĩa:

Hiệu điện thế định mức của bếp điện là 220V

Công suất định mức của bếp điện là 880W

Từ điện năng sang nhiệt năng.

b. \(Q=UIt=220\left(\dfrac{880}{220}\right).10.60=528000\left(J\right)=126110,64\left(Cal\right)\)

c. \(A=Pt=880.2.30=52800\)Wh = 52,8kWh

\(\Rightarrow T=A.1300=52,8.1300=68640\left(dong\right)\)

\(b,\text{PT hoành độ giao điểm: }-x-7=-3x+1\Leftrightarrow x=4\Leftrightarrow y=-11\Leftrightarrow B\left(4;-11\right)\\ c,\text{Gọi }\left(D_3\right):y=ax+b\left(a\ne0\right)\\ \left(D_3\right)\text{//}\left(D_1\right)\Leftrightarrow a=-1;b\ne-7\Leftrightarrow\left(D_3\right):y=-x+b\\ \left(D_3\right)\cap\left(D_2\right)\text{tại điểm có tung độ }4\Leftrightarrow\left\{{}\begin{matrix}4=-3x+1\\4=-x+b\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=-1\\b=3\end{matrix}\right.\\ \text{Vậy }\left(D_3\right):y=-x+3\)

\(d,\Leftrightarrow B\left(4;-11\right)\in\left(D_4\right)\\ \Leftrightarrow8m-4-5m-2=-11\\ \Leftrightarrow3m=-5\Leftrightarrow m=-\dfrac{5}{3}\\ e,\Leftrightarrow\left\{{}\begin{matrix}-x-7=0\\\left(2m-1\right)x-5m-2=0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=-7\\7-14m-5m-2=0\end{matrix}\right.\\ \Leftrightarrow m=\dfrac{5}{19}\)

I.   Choose the word whose underlined part is pronounced differently from the others.

1.   A. lantern                  B. invader                  C. nation                    D. race

2. A. tradition                 B. question                C. procession            D. preservation.

* Choose the word whose main stressed syllable is different from the rest.

3. A. confusion         B. magician   C. important  D. otherwise

4. A. reunion            B. bamboo     C. festival      D. display

II.  Choose the best answer A, B, C or D to complete the sentence.

* Preposition:

5.   How much time do you spend _______ leisure activities?

      A. on                          B. in                            C. for                          D. with

6.   Tran Temple Festival is held _______ the 15th day of the first lunar month.

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

7. Our customs are passed __________ from generations to generations.

           A. down        B. up        C. to        D. over

*Form ( 3)

8. The costume of Thai is more ………..than that of the Hoa.     

             A. color                   B. colorful                      C. coloring                D. colored

9. She listens to classical music for ______________.

         A. relax                       B. relaxation             C. relaxed                  D. relaxing

10. She was ______________ with her job and decided to look for a new one.

            A. dissatisfied          B. satisfy                    C. satisfied                D. dissatisfy

Cái này phải là unsatisfied 

Meaning (4)

11. ________ in terraced fields is the main economic activity of ethnic people in Sapa.

      A. Fishing                  B. Rice cultivation   C. Hunting                 D. Gathering

12. Ghe Ngo Race is a religious ritual of the Khmer to _______ the Snake God Nagar.

      A. commemorate      B. preserve                C. command              D. process

13. In the UK, families often celebrate Christmas together, _________ they can watch each other open their presents!

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

14.      It’s a custom in the USA as people use __________ in all meals.

       A. cutleries       B. offsprings       C. belongings       D. tips

Grammar (6)

15. The volunteers have to work much……..usual to save the dying animals from the forest fire.

      A. as hard as            B. more hard than             C. harder than             D. the hardest

16.  You look really tired. You _________ take a few days off and have a holiday.

      A. should                   B. must                       C. have to                  D. can

17. In the UK, there are lots of customs for table manners. For example, We ______ use a knife and fork at dinner.

            A. have to                     B. are having                 C. has to                 D. having to

18.  Does she fancy …………… a book to the younger children?

            A.  reads                    B. reading                  C. to read                   D. read

19. You _________ speak when the teacher is speaking.

      A. needn’t                 B. can’t                      C. don’t have to        D. mustn’t

20. We usually spend our holiday in the village _______ our grandparents live.

      A.what                        B. where                    C. which                    D. when

Speaking (2)

21. ‘The film was very exciting, but the ending was unexpected.’

      ‘_______ I didn’t like its ending.’

      A. It’s great!              B. Spot on!                C. Sounds bad!         D. Hold on!

22.       “My favourite leisure activity is people watching.” “_______”

      A. That sounds so weird!                            B. That’s all right.

      C. OK. That’s what you’ve chosen.          D. Sure. It’s very entertaining

27. In_A Vietnam the engagement is_B sometimes considered much_{C( more )}  important than_D the wedding.

C. (much  more)

28. Nomadic_A children learn riding_{B ( to ride)} a horse when_C they are very small_D.

B. (riding\(\rightarrow\) to ride)

29. According for_{A(According )} tradition, the first person to enter_B the house on New Year’s Eve  brings_C either good luck or_D bad luck.

A. (According for → According)

30. The Japanese are_A familiar with_B the western custom to eat_{C ( of eating )} a turkey dinner for_D Christmas.

C. ( to eat → of eating)

  Read the passage carefully, then choose the correct answers.

      Tran Temple Festival, one of the largest annual spring festivals in Vietnam, is held on the 14th night and 15th day of the first lunar month at the national historical complex of the Tran Kings’ shrines and tombs in Tien Duc Commune, Hung Ha District, Nam Dinh City. It usually begins with an incense-offering rite at the kings’ tombs and a ritual for the opening of the gates of Den Thanh (Thanh Temple), Den Mau (Mother Temple) and the Tran Kings’ shrines. They are followed by a ‘water procession’, in which people will carry nine ornate palanquins with memorial plaques of the Kings of the Tran Dynasty and members of their royal families. A series of folk games are also organized during the festival, such as a rice-cooking challenge, clay firecrackers, chung cake wrapping and tug of war, alongside traditional performances and sport games including lion dances, dragon dances, cheo and chau van singing, human chess, wrestling and martial arts.

      The Tran Temple Festival was recognized as a national intangible heritage in 2014. The historical complex of the Tran Kings’ shrines and tombs received special national relic status last year.

36.       How often is the Tran Temple Festival held?

      A. every month         B. every year             C. every two years   D. twice a year

37. The Tran Temple Festival usually begins with ________.

      A. formal ceremonies                                  B. a water procession

      C. prayers of thanks                                     D. incense offerings to the gods

38. The word ‘they’ in the passage refers to ________.

      A. temples                 B. offerings               C. shrines                  D. rituals

39. Which of the followings is not organized in the festival?

      A. rice cooking         B. tug of war             C. boat race               D. human chess

40. Which of the followings is not mentioned in the text?

      A.The Tran Dynasty is the most brilliant reign in Vietnamese history.

      B.Tran Temple Festival was recognized as a national intangible heritage.

      C. Nine ornate palanquins are carried in the water procession.

m cần gấp lấm nha cũng cảm ơn mn 

mỗi người sau khi trả lời

nhìn hết câu trả lời bạn sẽ thấy chữ :'đúng' và chữ 'sai' 

Nếu bạn thấy câu trả lời đúng thì bạn k đúng

@Như Ý

nhìn bên dưới câu trả lời -> nhấn đúng

xong!

Vậy nếu mình chọn nhiều người được ko

sai nhé bạn

câu đúng r nha

sai nhé 

HT 

???????

ko hiểu thì thôi

a) Xét ΔOBH và ΔODA có 

OB=OD(gt)

\(\widehat{BOH}=\widehat{DOA}\)(hai góc đối đỉnh)

OH=OA(O là trung điểm của HA)

Do đó: ΔOBH=ΔODA(c-g-c)

Suy ra: \(\widehat{OHB}=\widehat{OAD}\)(hai góc tương ứng)

mà \(\widehat{OHB}=90^0\)(gt)

nên \(\widehat{OAD}=90^0\)

hay AH\(\perp\)AD(đpcm)

b) Xét ΔAOE vuông tại A và ΔHOC vuông tại H có

OA=OH(O là trung điểm của AH)

\(\widehat{AOE}=\widehat{HOC}\)(hai góc đối đỉnh)

Do đó: ΔAOE=ΔHOC(Cạnh góc vuông-góc nhọn kề)

Suy ra: AE=HC(hai cạnh tương ứng)(1)

Ta có: ΔAOD=ΔHOB(cmt)

nên AD=HB(Hai cạnh tương ứng)(2)

Xét ΔAHB vuông tại H và ΔAHC vuông tại H có

AB=AC(ΔABC cân tại A)

AH chung

Do đó: ΔAHB=ΔAHC(Cạnh huyền-cạnh góc vuông)

Suy ra: HB=HC(Hai cạnh tương ứng)(3)

Từ (1), (2) và (3) suy ra AD=AE

mà E,A,D thẳng hàng(gt)

nên A là trung điểm của DE

) Xét ΔOBH và ΔODA có 

OB=OD(gt)

ˆBOH=ˆDOABOH^=DOA^(hai góc đối đỉnh)

OH=OA(O là trung điểm của HA)

Do đó: ΔOBH=ΔODA(c-g-c)

Suy ra: ˆOHB=ˆOADOHB^=OAD^(hai góc tương ứng)

mà ˆOHB=900OHB^=900(gt)

nên ˆOAD=900OAD^=900

hay AHAD(đpcm)

b) Xét ΔAOE vuông tại A và ΔHOC vuông tại H có

OA=OH(O là trung điểm của AH)

ˆAOE=ˆHOCAOE^=HOC^(hai góc đối đỉnh)

Do đó: ΔAOE=ΔHOC(Cạnh góc vuông-góc nhọn kề)

Suy ra: AE=HC(hai cạnh tương ứng)(1)

Ta có: ΔAOD=ΔHOB(cmt)

nên AD=HB(Hai cạnh tương ứng)(2)

Xét ΔAHB vuông tại H và ΔAHC vuông tại H có

AB=AC(ΔABC cân tại A)

AH chung

Do đó: ΔAHB=ΔAHC(Cạnh huyền-cạnh góc vuông)

Suy ra: HB=HC(Hai cạnh tương ứng)(3)

Từ (1), (2) và (3) suy ra AD=AE

mà E,A,D thẳng hàng(gt)

nên A là trung điểm của DE