AD=\(\left(36:2:3\right)-4=2cm\)

V=AD.AA'.AB=2.3.4=24cm

Đổi 20 phút=\(\frac{1}{3}\) h

Gọi x( km/h) là vận tốc của ôtô thứ nhất( Điều kiện x\(\in Z^+\) ,x>10)

Vận tốc của ôtô thứ hai là x+10(km/h)

Theo đề bài, ta có phương trình:

\(\frac{100.3\text{x}-100.3\left(x+10\right)}{3\text{x}\left(x+100\right)}=\frac{1}{3x\left(x+100\right)}\)

\(\Rightarrow\)bỏ mẫu tự tính

\(\Leftrightarrow x^2+10\text{x}-3000=0\)

\(\Leftrightarrow x^2+60\text{x}-50\text{x}-3000\)

\(\Leftrightarrow\left(x-50\right)\left(x+60\right)\)

\(\Leftrightarrow\left\{{}\begin{matrix}x-50=0\\x+60=0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=50\\x=-60\end{matrix}\right.\)

x=-60( không thoả) ; x=50( thoả mãn)

Vậy: vận tốc ôtô thứ nhất là 50km/h

Vận tốc ôtô thứ 2 là : 50 +10=60(km/h)

Nhân vật Quan phụ mẫu hiện lên như thế nào qua truyện ngắn Sống chết mặc bay? Em có suy nghĩ gì?

Cm tác giả đã thành công khi sử dụng nghệ thuật tương phản, tăng cấp.( viết đoạn văn)

Hãy đưa ra sáng Kiến hoặc các cách thức để giúp những bạn này luôn nhớ đeo (mang)kính theo đúng chỉ định của bác sĩ.

1. Kể tên 4 di sản văn hoá phi vật thể và 4 di sản văn hoá vật thể ở nước ta.

2. Em hãy đề xuất 4 biện pháp bảo vệ môi trường ở trường học.

3. Theo em " Hát tuồng" có cần giữ gìn và phát huy không? Tại sao?

4. Khi gặp những hành vi phá hoại môi trường và tài nguyên thiên nhiên em cần phải làm gì để thực hiên trách nhiêm công dân?

TOPIC4:

Travelling in the future

PART 1: Introduction and interview on familiar topics

1. The examiner asks the student about him/herself, his/her family, his/her hobbies, his/her favourite foods and drinks, and his/her studies,…

2. Do you like traveling? Do you like traveling alone or with your family?

3. Have you ever travelled to other paces? Where are they?

4. Which places would you like to visit this summer vacation? Why?

Part 2: Describe a future means of transport

You should talk about:

- Name of transport

- How it looks

- How its function

- What you think about it

Part 3:

1. What means of transports do you prefer to use? Why?

2. What do you think about traffic in VietNam? In your neighborhood?

SPEAKING TEST

GRADE: 7

TOPIC 1: TRAFFIC

Part 1: Introduction and interview on familiar topics

1. How far is it from your house to school?

2. How do you go to school every day?

Part 2: Individual long turn (This part is given to the student)

SPEAKING TEST

GRADE: 7

TOPIC 3: FESTIVALS

Part 1: Introduction and interview on familiar topics

1. Can you tell me some festival in Viet Nam ?

2. Which festival do you participated in?

Part 2: Individual long turn (This part is given to the student)

Help me!

1. Write a paragraph (about 60-80 words) to talk about how to save energy in your house..

The following ideas may help you:

- prepare food carfully before you cook.

- turn off the lights when you don’t use them.

- turn off the faucets tightly after using.

- dry things with the sunlight instead of using electricity.

2. Write a short paragraph about the festival you attended, the suggested questions may help you.

1. What was the name of the festival?

2. Where was it held?

3. When was it held?

4. Who celebrated it?

5. How was it held?

6. How did you feel when you attended the festival?

3. Write a paragraph of about 60 - 80 words about what should we do to save energy. You should use the cues given.

- using low energy light bulbs
- turning off all electric devices like TVs, radios, computers or lights before we go out
- using more public transports instead of riding motorbikes or driving cars

4. Write a paragraph (about 60-80 words) to talk about how to save energy in your house. The following prompts may help you:

1. prepare food carfully before you cook.

2. turn off the lights when you don’t use them.

3. turn off the faucets tightly after using.

4. dry things with the sunlight instead of using electricity.

5. Write about a passage about one of the festival you know- you can use the ideas provided

-Name of the festival

-Time of the festival

-Main activities of the festival

-Your feeling about the festival

6. Write a paragraph (about 60-80 words) about means of transport in the future.

The following questions may help you:

1. name of transport

2. how it looks

3. how it functions

4. what you think about it

7. Write a paraghrap to tell about your saving energy. Follow these cues.

- Use electricity more efficiently.

- Reduce our electricity bills.

- Turn off the lights before going to bed.

- Use public transport

- Increase the tax on petrol.

- Avoid using cars or motorbikes for short trips.

8. Writing a short paragraph about one of the festivals you know. You can use the ideas provided:(1,5 points)

- Name of the festival.

- Time of the festival.

- Purpose of the festival.

- Main activities of the festival.

-Your feeling about the festival.

Viết giúp mình từng bài 1 nha! Help me!