Nguyễn Lê Gia Hưng
I. Choose the best answer :1. My home village is ………….. 40 kilometers north of the capital.a. held b. laid c. located d. surrounded2. There is a large ……………….. of animals that live in Nairobi National Parks.a. vary b. various c. varied d. variety3. One species is dependent …………….. another for survival.a. to b. on c. of d. at4. There are toxic levels of ………….. in the water of this lake.a. chemists b. chemistry c. chemicals d. chemics5. Tram Chim national park is created to ……. several rare birds,...
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Phạm Nhật Trúc
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Đỗ Thanh Hải
27 tháng 3 2021 lúc 18:20

There is a large... of animals that live in Nairobi National Park A various B varied C variety D vary

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Minh Nhân
27 tháng 3 2021 lúc 18:20

There is a large... of animals that live in Nairobi National Park A various B varied C variety D vary

 
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Nguyễn Thị Huyền
27 tháng 3 2021 lúc 18:23

variety

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Dương Minh
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Nguyen Hoang Hai
14 tháng 8 2017 lúc 8:24

Đáp án: C

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Nhật Minh ( Box Văn + An...
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Yến Vy Trần
21 tháng 2 2019 lúc 12:52

1 . There is a large varity of animals that live in Nairobi National Park . 

đang chờ ý kiến đóng góp

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Lê Chí Cường
21 tháng 2 2019 lúc 13:26

\(\sqrt{x^2-2m}+2.\sqrt{x^2-1}=x\ge0\)

đkxd: \(x^2\ge2m,1\)

Ta có: \(\sqrt{x^2-2m}+2.\sqrt{x^2-1}=x< =>\text{​​}\text{​​}\text{​​}2.\sqrt{x^2-1}=x-\sqrt{x^2-2m}\)

=>\(4.\left(x^2-1\right)=\left(x-\sqrt{x^2-2m}\right)^2\)và \(x-\sqrt{x^2-2m}\ge0< =>x\ge\sqrt{x^2-2m}< =>m\ge0\)

<=>\(4x^2-4=x^2-2x.\sqrt{x^2-2m}+x^2-2m\)

<=>\(2x^2+2m-4=-2x.\sqrt{x^2-2m}\)

<=>\(x^2+m-2=-x.\sqrt{x^2-2m}\)

=>\(\left(x^2+m-2\right)^2=\left(-x\sqrt{x^2-2m}\right)^2\)và \(x^2+m-2\ge0\)

<=>\(x^4+2.\left(m-2\right)x^2+\left(m-2\right)^2=x^4-2m.x^2\)

<=>\(\left(4m-4\right)x^2=-\left(m-2\right)^2\)

-xét m=1=>pt<=>0.x^2=-1(vô lí, loại)

-xét m khác 1

=>\(x^2=\frac{-\left(m-2\right)^2}{4m-4}\)

+Với m>1=>\(x^2=\frac{-\left(m-2\right)^2}{4m-4}< 0\)(vô lí, loại)

+Với 0<_m<1=>\(x^2=\frac{-\left(m-2\right)^2}{4m-4}>0< =>\orbr{\begin{cases}x=-\sqrt{\frac{-\left(m-2\right)^2}{4m-4}}\\x=\sqrt{\frac{-\left(m-2\right)^2}{4m-4}}\end{cases}}\)

Theo điều kiện xác định=>x^2>_1,2m và x^2>_2-m

=>\(\hept{\begin{cases}\frac{-\left(m-2\right)^2}{4m-4}\ge1\\\frac{-\left(m-2\right)^2}{4m-4}\ge2m\end{cases}and\frac{-\left(m-2\right)^2}{4m-4}\ge2-m}< =>\hept{\begin{cases}\frac{\left(m-2\right)^2}{4-4m}\ge1\\\frac{\left(m-2\right)^2}{4-4m}\ge2m\end{cases}and\frac{\left(m-2\right)^2}{4-4m}\ge2-m}\)Vì 4-4m>0=>\(\hept{\begin{cases}\left(m-2\right)^2\ge4-4m\\\left(m-2\right)^2\ge2m\left(4-4m\right)\end{cases}and\left(m-2\right)^2\ge\left(4-4m\right)\left(2-m\right)< =>\hept{\begin{cases}m^2\ge0\\\left(3m-2\right)^2\ge0\end{cases}}}\)và 2/3<_m<_2

Do đó để pt có nghiệm thì 2/3<_m<1

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Vdv Mạnh
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•¢ɦẹρ➻¢ɦẹρ
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Sunn
4 tháng 1 2022 lúc 10:09

31. Where is Mui Ne?

A. Phan Thiet B. Nam Dinh C. Ninh Binh

32. What is it famous for?

A. sweeping sand dunes B. beautiful rows of palm trees C. Both A and B

33. How is the water?

A. clean and green B. clean and blue C. dirty and black

34. What is the weather like in Mui Ne?

A. It’s sunny B. It’s never sunny C. It’s always rainy.

35. What look like moving waves?

 

A. coconut trees B. sea water C. the moving lines of golden sa

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Yến Nhi
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Dang Khoa ~xh
1 tháng 1 2022 lúc 12:13

46. A. For                          B. With                              C. Through                        D. In

47. A. destinations             B. places                            C. camps                            D. seasons

48. A. regarded                  B. found                            C. judged                           D. considered

49. A. attraction                 B. attracted                        C. attractive                       D. attracting

50. A. moved                     B. moving                         C. changed                         D. changing

51. A. reason                     B. the reason                     C. reason why                    D. the reason why

52. A. look                         B. look at                           C. look like                        D. look for

53. A. perfect                     B. best                               C. ideal                              D. wonder

54. A. make                       B. makes                           C. made                             D. making

55. A. to discover              B. for discovering             C. discovering                   D. to be discovered

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Menna Brian
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Đỗ Thanh Hải
26 tháng 10 2021 lúc 18:56

1 C

2 B

3 A

4 C

5 D

6 A

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lê nhật hòa
Xem chi tiết
Khinh Yên
31 tháng 12 2021 lúc 11:13

*Choose the best answer

1. How does the boy go to school every day?

A. by bike B.by car C. by bus D. on foot

2. Where does his father sometimes take him?

A. His father sometimes takes him to the zoo. B. His father sometimes takes him to the market.

C. His father never takes him to the market. D. His father takes him to the museum.

3. Does the boy like riding on the electric train in the town square?

A. Yes, he does B. No, he doesn’t C. Yes, he can D. No, he can’t

4. What do the children do on starry nights? 

A. They lie on the grass B. They look at the sky and daring each other to find the Milky Way.

C. They dream of far away places. D. All A,B and C are correct

IV. DO AS DIRECTED (3pts)

1.Minh likes playing sports with his friends every Sunday. ( rewrite sentence without changing the meaning)

F Minh adores ………………playing sports with his friends every Sunday.

…………………….……………………………………………………………

2. No one in my class is more intelligent than Lan. ( rewrite sentence without changing the meaning)

F Lan is the most intelligent student in my class.

 …………………………………….………………………………………………………….………

3. (Combine two sentences with the adverb “moreover”)

F…………………Tet is a time for us to worship our ancestors. Moreover, it’s also a time for family reunion. 

 …………………………………………………………………….…………………..

4. Nam/ speak / English /well/ than /his friend/. (Make a meaningful sentence)

F…………Nam speaks English better than his friend does.

……………………………………………………………………………………….…………..

 

 

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Tuấn Khải Vương
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Vũ Như Quỳnh
31 tháng 8 2018 lúc 14:56

1. I / that / wish / weekend / I / uncle / this / could / my.

a. I wish that I could visit mu uncle this weekend.

b. I wish my uncle this weekend that I could wish.

c. I could wish I visit that my uncle this weekend.

d. I could visit that weekend I my uncle wish this.

2.bus / reached / hour / we / a / and / the / took / it / place / one.

a. We took a bus in one hour and the place it reached.

b. A bus reached the place and we took it in one hour.

c. A bus took we reached it in one hour and the place.

d.We took a bus and it reached the place in one hour.

3. food / terrible / we / out / the / was / so / walked / restaurant / of / the.

a. The food was out of the restaurant, so we walked terrible.

b. The food was terible, so we walked out of the restaurant.

c. We was terrible out of the restaurant, so the food walked.

d. The restaurant was terrible, so we walked out of the food.

4. midnight / home / late / train / the / so / that / got / after / was / we / the.

a. The train got home after the midnight so that we was late.

b. We got home so late that the train was after the midnight.

c. The train was so late that we got home after the midningt.

d. We was late so that after the midnight the train got home.

5. village / forty / to / east / Hanoi / my / is / kilometers / the / of / home / about.

a. About forty kilomiters is my home village to the east of Hanoi.

b. To the east of Hanoi about forty kilometers is my home village.

c. My home village is about forty kilometers to the east of Hanoi.

d. East of the Hanoi is my home village of about forty kilometers.

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Ngố ngây ngô
31 tháng 8 2018 lúc 14:55

1. I / that / wish / weekend / I / uncle / this / could / my.

a. I wish that I could visit mu uncle this weekend.

b. I wish my uncle this weekend that I could wish.

c. I could wish I visit that my uncle this weekend.

d. I could visit that weekend I my uncle wish this.

2.bus / reached / hour / we / a / and / the / took / it / place / one.

a. We took a bus in one hour and the place it reached.

b. A bus reached the place and we took it in one hour.

c. A bus took we reached it in one hour and the place.

d.We took a bus and it reached the place in one hour.

3. food / terrible / we / out / the / was / so / walked / restaurant / of / the.

a. The food was out of the restaurant, so we walked terrible.

b. The food was terible, so we walked out of the restaurant.

c. We was terrible out of the restaurant, so the food walked.

d. The restaurant was terrible, so we walked out of the food.

4. midnight / home / late / train / the / so / that / got / after / was / we / the.

a. The train got home after the midnight so that we was late.

b. We got home so late that the train was after the midnight.

c. The train was so late that we got home after the midningt.

d. We was late so that after the midnight the train got home.

5. village / forty / to / east / Hanoi / my / is / kilometers / the / of / home / about.

a. About forty kilomiters is my home village to the east of Hanoi.

b. To the east of Hanoi about forty kilometers is my home village.

c. My home village is about forty kilometers to the east of Hanoi.

d. East of the Hanoi is my home village of about forty kilometers.

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