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🧪 Khoa học tự nhiênĐơn vị của cường độ dòng điện là gì?A. VônB. AmpeC. ÔmD. OátKim loại nào sau đây tác dụng với dung dịch HCl tạo ra khí hiđro?A. CuB. AgC. FeD. AuCông thức hóa học của axit sulfuric là:A. HClB. H₂SO₄C. HNO₃D. NaOHADN có chức năng chủ yếu là gì?A. Cung cấp năng lượngB. Lưu giữ và truyền đạt thông tin di truyềnC. Tiêu hóa thức ănD. Vận chuyển oxygen📖 Ngữ...
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🧪 Khoa học tự nhiên

  1. Đơn vị của cường độ dòng điện là gì?
    A. Vôn
    B. Ampe
    C. Ôm
    D. Oát
  2. Kim loại nào sau đây tác dụng với dung dịch HCl tạo ra khí hiđro?
    A. Cu
    B. Ag
    C. Fe
    D. Au
  3. Công thức hóa học của axit sulfuric là:
    A. HCl
    B. H₂SO₄
    C. HNO₃
    D. NaOH
  4. ADN có chức năng chủ yếu là gì?
    A. Cung cấp năng lượng
    B. Lưu giữ và truyền đạt thông tin di truyền
    C. Tiêu hóa thức ăn
    D. Vận chuyển oxygen

📖 Ngữ văn

  1. Truyện “Làng” của Kim Lân viết về chủ đề nổi bật nào?
    A. Tình yêu quê hương, đất nước
    B. Tình yêu đôi lứa
    C. Tình bạn
    D. Tuổi thơ
  2. Nhân vật chính trong “Lặng lẽ Sa Pa” là ai?
    A. Ông họa sĩ
    B. Anh thanh niên
    C. Bác lái xe
    D. Cô kĩ sư
  3. “Truyện Kiều” là tác phẩm của ai?
    A. Nguyễn Du
    B. Nguyễn Trãi
    C. Hồ Xuân Hương
    D. Nam Cao

🌍 Lịch sử & Địa lí

  1. Chiến thắng Điện Biên Phủ diễn ra vào năm nào?
    A. 1945
    B. 1950
    C. 1954
    D. 1975
  2. ASEAN được thành lập vào năm nào?
    A. 1945
    B. 1967
    C. 1975
    D. 1995
  3. Việt Nam nằm ở khu vực nào của châu Á?
    A. Đông Á
    B. Tây Á
    C. Đông Nam Á
    D. Nam Á

🇬🇧 Tiếng Anh

  1. Choose the correct answer:
    She _____ to school every day.
    A. go
    B. goes
    C. going
    D. gone
  2. What is the opposite of “expensive”?
    A. Cheap
    B. Large
    C. Modern
    D. Difficult
  3. Choose the correct sentence:
    A. I have lived here for five years.
    B. I live here since five years.
    C. I lived here for since five years.
    D. I am live here five years.

💻 Tin học

  1. Thiết bị nào dùng để nhập dữ liệu vào máy tính?
    A. Bàn phím
    B. Màn hình
    C. Loa
    D. Máy chiếu
  2. Internet là gì?
    A. Một phần mềm
    B. Một mạng máy tính toàn cầu
    C. Một hệ điều hành
    D. Một loại virus

🧠 Câu hỏi tổng hợp

  1. Hành tinh nào gần Mặt Trời nhất?
    A. Trái Đất
    B. Sao Kim
    C. Sao Thủy
    D. Sao Hỏa
  2. Khí nào chiếm tỉ lệ lớn nhất trong khí quyển Trái Đất?
    A. Oxygen
    B. Nitrogen
    C. Carbon dioxide
    D. Hydrogen
  3. Ai là người đọc bản Tuyên ngôn Độc lập ngày 2/9/1945?
    A. Võ Nguyên Giáp
    B. Hồ Chí Minh
    C. Phạm Văn Đồng
    D. Trường Chinh
  4. Cơ quan nào của cây thực hiện phần lớn quá trình quang hợp?
    A. Rễ
    B. Thân
    C. Lá
    D. Hoa
  5. 🇻🇳 Ngày Quốc khánh Việt Nam là ngày nào?
    A. 30/4
    B. 1/5
    C. 2/9
    D. 20/11 cái này lớp 9 nhé ai đúng mik tick
10

cái gì đây

29 tháng 8

câu hỏi cho người lớp 9

Opinion Essay: Restoring Local Ecosystems Today, many people argue that we should spend more money on restoring local ecosystems to combat environmental degradation. From my point of view, investing in the restoration of our natural surroundings is absolutely essential for a sustainable future. Firstly, the most important reason why we should prioritize this spending is that local ecosystems provide vital services that sustain human life. For instance, healthy wetlands and forests act as natural filters for our water and air, which directly impacts our public health. Without these natural systems, the cost of artificial filtration and healthcare would far exceed the investment in restoration. Secondly, we should fund these projects because human activities like urban sprawl and pollution have caused significant habitat loss. That is why we must take responsibility to repair the damage. Finally, the neglect of these areas has led to a decrease in biodiversity, which affected the stability of our local food chains. Restoring habitats allows native species to thrive again, ensuring a balanced environment. In conclusion, I firmly believe that while it requires significant financial resources, it is essential to invest in our local ecosystems. Protecting nature is, ultimately, protecting ourselves. Word count: ~178 words Key Features Used:
  • Structure: Follows the Introduction-Body-Conclusion format requested.
  • Vocabulary: Uses the specific phrases provided in your prompt (e.g., "From my point of view", "Firstly, the most important reason why...", "has led/affected").
  • Tone: Persuasive and formal, suitable for an academic opinion essay.
25 tháng 3
Title: A School Campaign Against Cyberbullying
To: The Head Teacher
Date: October 25, 2023
Prepared by: Nguyen Binh, Class 11A2
Introduction:
Cyberbullying has become a common issue nowadays because most students spend a lot of time on social media. We would like to propose a campaign called "Stop Cyberbullying" to help our classmates understand the seriousness of this problem.
Details about the campaign:
The campaign events will take place in the school playground and in each classroom. The campaign will last for five days, from Monday to Friday next week. All students in our school will participate in these activities. The main activities will include a photo exhibition, a speech contest about online kindness, and a workshop on how to report cyberbullies safely.
Goals and benefits of the campaign:
The campaign aims at raising students' awareness of the harmful effects of online bullying. It will allow students to learn how to protect themselves and their friends in the digital world. Moreover, it will encourage a culture of respect and support among teenagers.
Conclusion:
We hope that you will consider our proposal to make our school a safer place for everyone.
25 tháng 3
Title: A School Campaign Against Cyberbullying
To: The Head Teacher
Date: October 20, 2023
Prepared by: The Student Council
Introduction:
  • Cyberbullying has become a common issue nowadays because more students are using social media and digital devices.
  • We would like to propose a school campaign called "Safe Surfing" to raise awareness and support victims.
Details about the campaign:
  • The campaign events/activities will take place in the school assembly hall and the computer labs.
  • The campaign will last for one week, from Monday to Friday.
  • All students and teachers will participate in the workshops/The campaign will target teenagers in our school.
  • The main events/activities will include a seminar with experts, a poster-making contest, and a talk show about online safety.
Goals and benefits of the campaign:
  • The campaign aims at providing students with the knowledge to identify and prevent cyberbullying.
  • The campaign will allow students to share their experiences and learn how to protect themselves online.
Conclusion:
  • We hope that you will consider our proposal and help us create a safer school environment.
25 tháng 3
Preserve Our Heritage - Preserve Trang An Scenic Landscape Complex Trang An (Ninh Binh) was the first site in Viet Nam to be recognised by UNESCO as a mixed World Heritage Site in 2014. It is famous for its stunning limestone karst peaks, mysterious caves, and historical temples. Preserving nature
  • Trang An may be affected by mass tourism. This kind of tourism can cause/lead to/result in environmental pollution and damage to the natural habitat.
  • To preserve Trang An, it is necessary to limit the number of daily visitors / it is recommended that we promote eco-tourism / we should protect the local flora and fauna.
Preserving culture
  • Another problem might be young people’s lack of knowledge about our cultural heritage. As a result,/As a consequence, they may not appreciate the historical values of the site.
  • This problem can be solved if we integrate heritage education into schools / To deal with this problem, we should organize more field trips for students.
LET’S PRESERVE AND BE PROUD OF OUR HERITAGE!
25 tháng 3

cô ơi cô là giáo viên anh ạ?

12 tháng 8

ok e nha

23 tháng 6 2025

Mình chưa rõ câu hỏi bạn nhé! Bạn muốn dịch, hỏi, hay yêu cầu viết bài?

Write a cause and effect essay about a teen social issue. Write about 150 - 180 words.Writing cause and effect essaysTo write an effective cause and effect essay, you should:1. Introduce the problem and explain the purpose of the essay.Today, many teenagers use social media every day. Some teens spend too much time on it, which can cause problems. This essay will explain the causes and effects of teens’ addiction to social media.2. Give causes for the problem. For each cause, add supporting...
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Write a cause and effect essay about a teen social issue. Write about 150 - 180 words.

Writing cause and effect essays

To write an effective cause and effect essay, you should:

1. Introduce the problem and explain the purpose of the essay.

Today, many teenagers use social media every day. Some teens spend too much time on it, which can cause problems. This essay will explain the causes and effects of teens’ addiction to social media.

2. Give causes for the problem. For each cause, add supporting evidence (reasons, opinions, examples).

One cause of social media addiction is that the apps are designed to keep people using them for a long time. …

3. State the effects of the problem. For each effect, add supporting evidence.

One effect of social media addiction is that it can make teens feel unhappy or less confident. … 

4. Give a conclusion. Restate the problem and the causes and effects that you described.

In conclusion, social media addiction happens because of app design and the desire to be popular. It can cause low self-confidence and problems with real-life relationships.

3
19 tháng 5 2025

The Scroll and the Soul: Causes and Effects of Teen Social Media Addiction

The ubiquitous presence of smartphones has woven social media into the fabric of teenage life. While offering connection and information, excessive engagement can lead to addiction, a growing concern with significant causes and detrimental effects. This essay will explore why teenagers become hooked on social media and the resulting consequences on their well-being.


One primary cause is the inherent design of social media platforms. Developers employ algorithms that constantly refresh content, offering a stream of notifications, likes, and comments. This creates a reward system, triggering dopamine release and fostering a compulsive need to check for updates. The fear of missing out (FOMO), fueled by curated online portrayals of others' seemingly perfect lives, further compels teens to stay connected, lest they feel excluded. Peer pressure and the desire for online validation also play a crucial role, driving teenagers to seek acceptance and status through likes and followers.


The effects of this addiction are multifaceted. Academically, excessive screen time often leads to decreased concentration, lower grades, and procrastination. Socially, reliance on virtual interactions can hinder the development of crucial face-to-face communication skills and weaken real-life relationships. Furthermore, the constant exposure to idealized images can fuel body image issues, anxiety, and depression as teenagers compare their own realities to the often-filtered online world. Sleep deprivation, stemming from late-night scrolling, exacerbates these negative impacts, affecting both physical and mental health.

In conclusion, the addictive nature of social media among teenagers is driven by manipulative platform design and the powerful desire for social acceptance. This dependence, in turn, cultivates academic struggles, social isolation, and a decline in mental well-being, highlighting the urgent need for awareness and strategies to foster healthier online habits.


Write a passage about what skills and knowledge different generations have or could share with each other. Write about 150 - 180 words.Writing Skill: Giving supporting evidence in body paragraphsTo write good body paragraphs in essays, you should:1. Begin with a topic sentence. This tells the reader the key point of the paragraph. 2. Give supporting evidence for your topic sentence. First, give extra details and examples to support your main point. Then, give your opinion about it. Details...
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Write a passage about what skills and knowledge different generations have or could share with each other. Write about 150 - 180 words.

Writing Skill: Giving supporting evidence in body paragraphs

To write good body paragraphs in essays, you should:

1. Begin with a topic sentence. This tells the reader the key point of the paragraph. 

2. Give supporting evidence for your topic sentence. First, give extra details and examples to support your main point. Then, give your opinion about it. 

Details – Older generations could teach me how to plan for the future. They have more experience than I do. 

Examples – My uncle ran a business for 30 years. He is really good at planning. 

Opinions – I think he could help me plan my future career path.

3. Finish with closing sentences. This restates the topic sentence using different words and gives a final thought on the main point. 

Therefore, I think I could learn lots of planning skills from the older generations. It would really help me at school.

1
Write a short article in the form of a list about what people should do to live longer and healthier for your school’s newsletter. Write about at least four tips about 150 - 180 words. Writing short articles in the form of a list (listicles)1. Create a title. Use words to get readers' attention such as simple, free, easy, secret, etc. Make sure your title tells the readers exactly what to expect.Example: 5 secrets to a longer life; 10 easy habits you should have to live longer and happier2....
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Write a short article in the form of a list about what people should do to live longer and healthier for your school’s newsletter. Write about at least four tips about 150 - 180 words. 

Writing short articles in the form of a list (listicles)

1. Create a title. Use words to get readers' attention such as simple, free, easy, secret, etc. Make sure your title tells the readers exactly what to expect.

Example: 5 secrets to a longer life; 10 easy habits you should have to live longer and happier

2. Write a short introduction. Start with a question or an interesting fact about your topic.

Example:

Do you want to live past 90? If the answer is yes, read this article to find out what you can do to add years to your life expectancy!

3. Write your list points. Use the same style for all of them. For lists of things to do, start each point with a verb.

Examples:

Get plenty of sleep

Take care of your teeth

Have a healthy social life

4. Provide detailed information for each point. Include explanations, facts, or extra details to support your points.

Example:

Sleep is the time our body restores its energy and stores new information. Lack of sleep can lead to many health problems. We should sleep seven to eight hours a night.

5. Write a short conclusion. Summarize your main points or suggest an action in your conclusion.

Example:

The secrets to a longer life aren't very difficult. Pay attention to your diet, exercise, sleep, and happiness, and you'll find yourself enjoying your 100th birthday!

2