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Exercise 10: 1 The boy said to girl that he would never see her again. 2 He told her that she was his best friend. 3 Johnny told his mother that he didn’t know how to do that exercise. 4 The children said that they were waiting for the school bus. 5 Mary said that her father had died a year before. 6 John said that he finished studying his lesson. 7 Mary told John that she couldn’t go to the movies with him. 8 Mary told her friend that she would expect to see her the following Wednesday. 9...
Đọc tiếp

Exercise 10: 1 The boy said to girl that he would never see her again. 2 He told her that she was his best friend. 3 Johnny told his mother that he didn’t know how to do that exercise. 4 The children said that they were waiting for the school bus. 5 Mary said that her father had died a year before. 6 John said that he finished studying his lesson. 7 Mary told John that she couldn’t go to the movies with him. 8 Mary told her friend that she would expect to see her the following Wednesday. 9 He said that he didn’t know what had happened. 10 She said that she had gone to the doctor the day before. 11 He said that he had a toothache. 12 She said that she would write him a prescription. 13 They said that they were going to the drugstore. 14 He said that he the doctor had given him some pills. 15 She said that she went to the supermarket every day. Exercise 11: 1 She asked where my umbrella was. 2 Martin asked us how we learned English. 3 He asked if I had to do it. 4 The mother asked her daughter where she had been. 5 She asked her boyfriend which dress she should wear. 6 She wanted to know what they were doing. 7 He wanted to know if I was going to the cinema. 8 The teacher wanted to know who spoke English. 9 She asked me how I knew that . 10 My friend asked me where I had met her. Exercise 12: 1 He asked me if I spoke English. 2 She asked me if I was British or American. 3 She asked me if I had got a computer. 4 He wanted to know if I could type. 5 She wanted to know if I had come by train. 7 he asked her if she would be at the party . 8 She asked me if I could meet her at the station. 9hHe asked me if I had seen that car . 10 The mother asked the twins if they had tidied up their room .

3
2 tháng 5

\(\rarr\)

Exercise 10:

1. The boy said to the girl that he would never see her again.

2. He told her that she was his best friend.

3. Johnny told his mother that he didn’t know how to do that exercise.

4. The children said that they were waiting for the school bus.

5. Mary said that her father had died a year before.

6. John said that he had finished studying his lesson.

7. Mary told John that she couldn’t go to the movies with him.

8. Mary told her friend that she would expect to see her the following Wednesday.

9. He said that he didn’t know what had happened.

10. She said that she had gone to the doctor the day before.

11. He said that he had a toothache.

12. She said that she would write him a prescription.

13. They said that they were going to the drugstore.

14. He said that the doctor had given him some pills.

15. She said that she went to the supermarket every day.

Exercise 11:

1. She asked where my umbrella was.

2. Martin asked us how we had learned English.

3. He asked if I had to do it.

4. The mother asked her daughter where she had been.

5. She asked her boyfriend which dress she should wear.

6. She wanted to know what they were doing.

7. He wanted to know if I was going to the cinema.

8. The teacher wanted to know who spoke English.

9. She asked me how I knew that.

10. My friend asked me where I had met her.

Exercise 12:

1. He asked me if I spoke English.

2. She asked me if I was British or American.

3. She asked me if I had got a computer.

4. He wanted to know if I could type.

5. She wanted to know if I had come by train.

6. He asked her if she would be at the party.

7. She asked me if I could meet her at the station.

8. He asked me if I had seen that car.

9. The mother asked the twins if they had tidied up their room.

2 tháng 5
Exercise 10: Chuyển sang câu trực tiếp (Direct Speech)
  1. The boy said to the girl: I will never see you again.
  2. He said to her: You are my best friend.
  3. Johnny said to his mother: I don’t know how to do this exercise.
  4. The children said: We are waiting for the school bus.
  5. Mary said: My father died a year ago.
  6. John said: I finished studying my lesson.
  7. Mary said to John: I can’t go to the movies with you.
  8. Mary said to her friend: I will expect to see you next Wednesday.
  9. He said: I don’t know what happened.
  10. She said: I went to the doctor yesterday.
  11. He said: I have a toothache.
  12. She said: I will write you a prescription.
  13. They said: We are going to the drugstore.
  14. He said: The doctor gave me some pills.
  15. She said: I go to the supermarket every day.
Exercise 11: Chuyển sang câu trực tiếp (Direct Speech)
  1. She asked: Where is your umbrella?
  2. Martin asked us: How do you learn English?
  3. He asked: Do you have to do it?
  4. The mother asked her daughter: Where have you been?
  5. She asked her boyfriend: Which dress should I wear?
  6. She asked: What are they doing?
  7. He asked: Are you going to the cinema?
  8. The teacher asked: Who speaks English?
  9. She asked me: How do you know that?
  10. My friend asked me: Where did you meet her?
1 tháng 5

ta nhân cả hai vế với 2:

\(2\left(a^2+b^2+c^2\right)=2\left(ab+bc+ca\right)\)

\(a^2+a^2+b^2+b^2+c^2+c^2=2ab+2bc+2ca\)

\(\Rightarrow\left(a^2-2ab+b^2\right)+\left(b^2-2bc+c^2\right)+\left(c^2-2ca+a^2\right)=0\)

\(\left(a-b\right)^2+\left(b-c\right)^2+\left(c-a\right)^2=0\)

ta có bình phương luôn lớn hơn 0

=> a-b=0

hay a=b

b-c=0

hay b=c

c-a=0

hay c=a

=> a=b=c

Cho hàm số \(y = f(x) = 2x - 3\). Tính \(f(2) - f(-1)\).

2 tháng 5

\(\rarr\)

- Một số các bộ phận của tai ngoài, tai giữa và tai trong:

+ Tai ngoài: vành tai, ống tai

+ Tai giữa: màng nhĩ, 3 xương

+ Tai trong: ốc tai, ống bán khuyên, dây TK


Hoàng Hoa Thám giữ vai trò trung tâm và quyết định đối với cuộc khởi nghĩa Yên Thế:

  • Ông là lãnh tụ cao nhất, trực tiếp tổ chức, chỉ huy và duy trì lực lượng nghĩa quân.
  • tài quân sự linh hoạt, biết dựa vào địa hình rừng núi Yên Thế để đánh du kích hiệu quả.
  • uy tín lớn, quy tụ và gắn kết nhân dân, giúp phong trào tồn tại lâu dài (gần 30 năm).

👉 Đánh giá: Nếu không có Hoàng Hoa Thám, khởi nghĩa Yên Thế khó có thể kéo dài và đạt được sức ảnh hưởng lớn như vậy.

2 tháng 5

Hoạt động yêu nước của Phan Bội Châu (đầu thế kỉ XX):

+ Chủ trương bạo động vũ trang, dựa vào Nhật để chống Pháp.

+ Thành lập Hội Duy Tân (1904) và Việt Nam Quang Phục Hội (1912).

+ Phát động phong trào Đông Du (1905–1908) đưa thanh niên sang Nhật học.

+ Hoạt động ở nước ngoài, viết sách kêu gọi lòng yêu nước.

- Ý nghĩa: Góp phần thức tỉnh tinh thần dân tộc, mở đường cho phong trào sau.

1 tháng 5

Hệ thần kinh gồm:

+ Hệ thần kinh trung ương: não, tủy sống

+ Hệ thần kinh ngoại biên: dây thần kinh, hạch thần kinh

1 tháng 5

Thế kỉ XIX, Ấn Độ trở thành thuộc địa của thực dân Anh nhé b!

1 tháng 5

Thế kỷ XIX, Ấn Độ trở thành thuộc địa của thực dân Anh.

1 tháng 5

Thay E(1; 2) vào y = - 3x + 2 ta có:

2 = -3.1 + 2

0 = - 3 (vô lí)

Vậy E không thuộc đồ thị

Thay F(1; 1) vào y = -3x + 2 ta có:

1 = -3.1 + 2

0 = -3 + 2 - 1

0 = - 1 - 1

0 = - 2(vô lí)

vậy F không thuộc đồ thị

Thay M(1; -1) vào y = -3x + 2 ta có:

-1 = - 3.1 + 2

-1 = -3 + 2

-1 = -1 (thỏa mãn) nên M thuộc đồ thị

Thay N(2; 4) vào đồ thị ta có:

4 = -3.2 + 2

4 = - 6 + 2

4 = - 4 (không thỏa mãn) Nên N không thuộc đồ thị

Vậy chọn C. M(1; -1)

1 tháng 5

Thay \(x\) vào \(y = - 3 x + 2\):

  • A: \(x = 1 \Rightarrow y = - 3 \left(\right. 1 \left.\right) + 2 = - 1 \neq 2\) → sai
  • B: \(x = 1 \Rightarrow y = - 1 \neq 1\) → sai
  • C: \(x = 1 \Rightarrow y = - 1 = - 1\) → đúng
  • D: \(x = 2 \Rightarrow y = - 6 + 2 = - 4 \neq 4\) → sai

\(\rarr\) C. M(1; -1)

1 tháng 5

Gọi a là số học sinh của lớp 8A (a:nguyên, dương) (học sinh)

=> Số sách lớp 8A quyên góp được là 2a (quyển)

Số sách lớp 8B quyên góp là: (80 - a) . 3 = 240 - 3a (quyển)

Mà số sách lớp 8A và 8B quyên góp tổng là 198 quyển nên ta có:

2a + (240 - 3a) = 198

<=> -a = 198 - 240

<=> -a = -42

<=> a= 42 (TM)

Vậy lớp 8A và 8B có lần lượt 42 và 38 học sinh.

30 tháng 4

thay các giá trị của A(2,6) vào (d):y ta có:

6=2a+3

3=2a

a=\(\frac32\)

=>(d):y= \(\frac32x+3\)

ta có:

y=0 => x=-2 ta có tọa độ B(-2,0)

x=0=> y=3 ta có tọa độ C(0,3)

30 tháng 4

Vì (d): \(y = a x + 3\) đi qua \(A \left(\right. 2 ; 6 \left.\right)\), thay vào:

\(6=2a+3\Rightarrow2a=3\Rightarrow a=\frac32\)

Hàm số:

\(y=\frac32x+3\)

Đồ thị:

  • Khi \(x = 0\)\(y = 3\) ⇒ điểm \(B \left(\right. 0 ; 3 \left.\right)\)
  • Khi \(x = 2\)\(y = 6\) ⇒ điểm \(A \left(\right. 2 ; 6 \left.\right)\)