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I learn many subjects in school. But the one I enjoy learning is History.
History tells us how people lived ages ago. It also tells us how men had to struggle to make the world a better place to live. Many pupils, however, do not to read History. They say that there are too many names and dates to remember. But they do not understand that if we do not know about the past, we can not understand the present properly. In fact, only a study of History will make us realize that everything we do today is the result of what our grandfathers and others before them did in the past. So, History is the long story, we learn many interesting things.
I love history so much that i have a lot of history books in my house. Some day, i might even write a history book myself.
I learn many subjects in school. But the one I enjoy learning is History.
History tells us how people lived ages ago. It also tells us how men had to struggle to make the world a better place to live. Many pupils, however, do not to read History. They say that there are too many names and dates to remember. But they do not understand that if we do not know about the past, we can not understand the present properly. In fact, only a study of History will make us realize that everything we do today is the result of what our grandfathers and others before them did in the past. So, History is the long story, we learn many interesting things.
I love history so much that i have a lot of history books in my house. Some day, i might even write a history book myself.
my favorite drink is soft drink. It's very great to drink. It has a lot of gases it's season why I love. It is sugar. Every people talks it isn't good for your healthy but I think it isn't harmful for my healthy. I love soft drinks very much
I learn many subjects in school. But the one I enjoy learning is History.
History tells us how people lived ages ago. It also tells us how men had to struggle to make the world a better place to live. Many pupils, however, do not to read History. They say that there are too many names and dates to remember. But they do not understand that if we do not know about the past, we can not understand the present properly. In fact, only a study of History will make us realize that everything we do today is the result of what our grandfathers and others before them did in the past. So, History is the long story, we learn many interesting things.
I love history so much that i have a lot of history books in my house. Some day, i might even write a history book myself.
Every day I have chance to watch different famous people shine and bring inspiration to others on TV; however, the one that inspires me the most is BTS . band is a typical example of a strong, intelligent and independent woman. However, band overcame all the difficulties to become one of the most successful singer and composer of America. Band challenges herself in different types of music, from Country, Ballad to Pop, and all of her songs carry deep meanings. Most people can find themselves in her lyrics and band melodies. Besides her singing career, band is also a who has band own enterprises and brand names. band had tried so hard in band youth to achieve the things that I always dream of; therefore, band is a great symbol that I always look up. band is forever my beloved idol, and her effort is the goal for me to never quit trying.
Bài 1 (2đ) a)
b)
c)
d)
Bài 2 (2đ)
1) Tìm x biết:
a)
b)
2) Vẽ đồ thị hàm số. Từ đó chứng minh 3 điểm A(2; -1), B(-12; -6) và C(-2; 1) không thẳng hàng.
Bài 3 (1,5đ) Có ba máy bơm cùng bơm nước vào ba bể có thể tích bằng nhau (lúc đầu các bể đều không có nước). Mỗi giờ máy thứ nhất, máy thứ hai, máy thứ ba bơm được lần lượt là 6m3, 10m3, 9m3. Thời gian bơm đầy bể của máy thứ hai ít hơn máy thứ nhấtlà 2 giờ. Tính thời gian của từng máy để bơm đầy bể.
Bài 4 (3,5đ) Cho tam giác ABC có AB < AC, tia phân giác của góc A cắt cạnh BC tại I. Trên cạnh AC lấy điểm D sao cho AD = AB.
a) Chứng minh rằng BI = ID.
b) Tia DI cắt tia AB tại E. Chứng minh rằng .
c) Chứng minh BD // EC.
d) Cho Chứng minh rằng AB + BI = AC.
Bài 5 (1đ) a) Cho các số a, b, c, x, y, z thỏa mãn a + b + c = a2 + b2 + c2 = 1 và (các tỉ số đều có nghĩa). Chứng minh x2 + y2 + z2 = (x + y + z)2.
b) (Dành riêng cho lớp 7A)
Cho tam giác ABC có AB = 2 cm, BC = 4 cm và = 600. Trên tia đối của tia BC lấy điểm D sao cho BD = BC, trên tia đối của tia BA lấy điểm E sao cho BE = BA. Tính diện tích tứ giác ACED.
Bài 1:
Bài 2:
1) a) – Nếu tứcthì
Ta có phương trình
- Quảng cáo -
– Nếu tức là x <thì
Ta có phương trình
Vậy x = 1 hoặc
b)
Vậyhoặc.
2) Vẽ đồ thị hàm số .
– Khithì.
Vậy điểmthuộc đồ thị của hàm số .
Đồ thị của hàm số này là đường thẳng OC trong hình vẽ bên.
– Xét điểm A, B thấy điểm C thuộc đồ thị còn điểm B không thuộc đồ thị , thật vậy:
+ Khi x = thìnên điểm B() không thuộc đồ thị .
+ Khithìnên điểmthuộc đồ thị .
Điểm A, C thuộc đồ thị còn điểm B không thuộc đồ thị nên 3 điểm A, B, C không thẳng hàng. (đpcm)
Bài 3: Gọi thời gian của từng máy để bơm đầy bể theo thứ tự là (giờ)
Vì thể tích 3 bể như nhau, nên thời gian của từng máy để bơm đầy b và thể tích nước bơm được mỗi giờ của mỗi máy là 2 đại lượng tỉ lệ nghịch.
Theo đề bài ta có: 6.x = 10.y = 9.z (1)
và x – y = 2 (2)
Từ (1) ta có: (90 làBCNN(6; 10; 9) (3)
Theo tính chất của dãy tỉ số bằng nhau, từ (3) và (2) ta có:
giờ, giờ vàgiờ = 3 giờ 20 phút.
Vậy thời gian của từng máy để bơm đầy bể lần lượt là 5 giờ, 3 giờ và 3 giờ 20 phút.
Bài 4:
- Quảng cáo -a) Xét tam giác ABI và tam giác ADI ta có:
(theo giả thiết)
(theo giả thiết)
AI: chung
(2 cạnh tương ứng) (đpcm)
b) Vìnên:
(2 góc tương ứng) (1)
Mà: (2 góc bẹt) (2)
Từ (1) và (2) ta có:
Xétvà ta có:
(chứng minh trên)
(2 góc đối đỉnh)
(chứng minh trên)
(đpcm)
c) Ta có: BI = ID (chứng minh trên) cân tại (tính chấtcủa tam giác cân) (1)
Ta lạicó: (chứng minh trên) (2 cạnh tương ứng) cân tại I
(tính chấtcủa tam giác cân) (2)
Xét 2 tam giácvà ta có:
(2 góc đối đỉnh)
(Tổng 3 góc của một tam giác bằng 1800) (3)
Từ (1), (2) và (3) ta có:
(cặp góc so le trong bằng nhau)
(đpcm)
d)Ta có(chứng minh trên)
(2 góc tương ứng)
Lạicó: (2 góc đối đỉnh)
(*)
Xét tam giác BIE ta có:
(gócngoàicủa 1 tam giác bằng tổng 2 góc trong không kề với nó) (**)
Từ (*) và (**) ta có: hay
Theo giảthiết, ta có:
cântại.
Vì BI = ID (chứng minh trên) nên BI = DC.
AC = AD + DC = AB + BI (đpcm)
Bài 5: a) Theo tính chất dãy tỉ số bằng nhau ta có:
(Theo giả thiết a + b + c = 1)
(1)
Theo tính chất dãy tỉ số bằng nhau, ta lại có:
(Theo giả thiết) (2)
Từ (1) và (2) ta có:
b) Xétvà ta có:
AB = EB (theo gt)
BD = BC (theo gt)
(cặp gócđối đỉnh bằng nhau)
Chứng minh tươngtự ta có:
Kẻ đường cao AH của tam giác ACD ()
Xét tam giác vuông AHB ta có:
(Tam giác vuông có một góc bằng 30000000 thì cạnh đối diện góc đó bằng nửa cạnh huyền)
- Quảng cáo -Áp dụng định lý Pitago vào tam giác vuông AHB, ta có:
Vậy diện tích tứ giác ACED là:
đề Anh
I am a student. So I spend the day in a (1) _________ way. I get up from bed (2) _________ in the morning. First, I do my morning (3) _________ I wash my face and (4) _________ my teeth. I take great care of my teeth, because bad teeth are a sign of bad (5) _________. Then I take a little (6) _________ exercise. After taking exercise, I go out for a walk in the open (7) _________. There I breathe (8) _________ morning air. My mind and body are both (9) _________ . Then I return home. I say my short (10) _________.
II. Choose the word whose underlined part is pronounced differently.
Question 11.
A. come B. money
C. notebook D. Monday
Question 12.
A. couple B. though
C. soul D. elbow
Question 13.
A. seven B. vowel
C. very D. foot
III. Choose the odd one out.
Question 14.
A. friend B. parent
C. uncle D. aunt
Question 15.
A. small B. big
C. old D. meet
Question 16.
A. school B. classmate
C. theater D. market
IV. Choose A, B, C or D that best completes the sentences or substitutes for the underlined word or phrase.
Question 17. Do volunteers often spend time helping other people in ___________, orphanages or homes for the aged.
A. capitals B. markets
C. schools D. hospitals
Question 18. we are helping the poor people in the remote areas.
A. faraway B. nearby
C. small D. difficult
- Quảng cáo -Question 19. During summer vacations, we teach children in ___________ areas how to read and write.
A. mountain B. urban
C. mountainous D. suburb
Question 20. What kind of ___________ work are you paripating in?
A. voluntarily B. volunteer
C. voluntary D. volunteerism
Question 21. People who are not in good health are ___________ people.
A. elderly B. homeless
C. rich D. sick
Question 22. I was absent ___________ class yesterday.
A. in B. of
C. from D. at
Question 23. He was delighted ___________ the present you gave him.
A. in B. to
C. for D. with
Question 24. It is very kind ___________ you to help them.
A. of B. in
C. about D. to
Question 25. It is difficult ___________ handicapped children to study with other children.
A. to B. for
C. on D. from
Question 26. I’m very grateful ___________ her for her help.
A. on B. of
C. about D. to
V. Read the text and choose the correct answer A, B, C, or D for each of the gaps.
EARTHWATCH
Have you ever wanted to do something different? Five years ago, Will Slade read about (27) ______ organization called Earthwatch. Earthwatch finds volunteers (28) ______ expeditons (29) ______ and explore different parts of the world.
Will decided (30) ______ an expedition to study elephants in Africa. “I wasn’t sure about it before I went.” say Will. “But in fact, I really enjoyed every minute of the expedition. We slept (31) ______ tents and we cooked our own food, but it was the great (32) ______ elephants and all the other animals there”. “I’ve (33) ______ all the expeditions, and I have seen some fantas places. How (34) ______ people have slept (35) ______ a beach, climbed a mountain, or see a whale? This world is such a beautiful place, but it’s disappearing fast. We have to learn more (36) ______ it if we are going to save it.”
Question 27.
- Quảng cáo -A. a B. the
C. an D. some
Question 28.
A. to B. for
C. at D. on
Question 29.
A. studying B. studied
C. study D. to study
Question 30.
A. to join B. join
C. joining D. joined
Question 31.
A. on B. in
C. at D. under
Question 32.
A. see B. saw
C. seeing D. to see
Question 33.
A. enjoyed B. enjoy
C. enjoying D. to enjoy
Question 34.
A. much B. far
C. many D. long
Question 35.
A. in B. on
C. to D. above
Question 36.
A. at B. in
C. of D. about
VI. Choose the best sentence that can be made from the cues given.
Question 37. I / not / visited / museum / three months.
A. I haven’t visited the museum three months ago.
B. I havn’t visited the museum for three months.
C. I didn’t visited the museum for three months.
D. I haven’t visited the museum three months ago.
Question 38. Ms Linda / beautiful photos / few days ago.
A. Ms Linda took many beautiful photos a few days ago.
B. Ms Linda took much beautiful photos a few days ago.
C. Ms Linda took many beautiful photos few days ago.
D. Ms Linda took much beautiful photos few days ago.
Question 39. The students / arrived / because / traffic jam.
A. The students arrived late because the traffic jam.
B. The students arrived late because of the traffic jam.
C. The students arrived lately because the traffic jam.
D. The students arrived lately because of the traffic jam.
Question 40. I / eat / fruits / because / they / green.
A. I can’t eat these fruits because of they are green.
B. I can’t eat this fruits because of they are green.
C. I can’t eat these fruits because they are green.
D. I can’t eat this fruits because they are green.
Question 1. simple
Question 2. early
Question 3. duties
Question 4. brush
Question 5. health
Question 6. physical
- Quảng cáo -Question 7. field
Question 8. pure
Question 9. refreshed
Question 10. prayer
Question 11. C | Question 26. D |
Question 12. A | Question 27. C |
Question 13. D | Question 28. B |
Question 14. A | Question 29. D |
Question 15. D | Question 30. A |
Question 16. B | Question 31. B |
Question 17. D | Question 32. D |
Question 18. A | Question 33. A |
Question 19. C | Question 34. C |
Question 20. C | Question 35. B |
Question 21. D | Question 36. D |
Question 22. C | Question 37. B |
Question 23. D | Question 38. A |
Question 24. A | Question 39. B |
Question 25. B | Question 40. C |
Hello everyone! My name is Quynh Anh. I’m twelve and I study at Le Quy Don Secondary School. Today, I want to tell you about a football player.
As you know, the U23 Vietnam Football Team has written a new history for football in Vietnam. After the match between two team Qatar and Vietnam, some football players Quang Hai, Xuan Truong, Tien Dung have become famous. In my opinion, I Xuan Truong- the captain of the U23 Vietnam Football Team.
Xuan Truong is 1,78 high. His weight is 67 kg. He is from Tuyen Quang Province, Vietnam. Now he is playing at the Gangwon Football Club, Gangwon Province, Korea. His date of birth is April 28th, 1995. He is still young, right?
Xuan Truong just a Korean. Xuan Truong also admitted that he is Korea because every time he eats at restaurants or foodstalls, the shop owner or staff usually greet him in Korean. I think that is true.
Xuan Truong has white skin Korean boys. The most eye-catching is that many female fans are fascinated.
In addition to good looks, good football, Xuan Truong also speaks Korean and English very well. In recent arles, Xuan Truong has represented members of his team to answer the press. He speaks fluently and confidently.
I love Xuan Truong very much. I hope him will succeeded in his soccer career and is always the pride of football in Vietnam.