Khi nhận ra sai sót trong việc nhập dữ liệu cho khóa ngoài ta sửa chữa bằng cách nào sau đây?

Các giai đoạn của hô hấp tế bào diễn ra theo trật tự nào dưới đây?

Công nghệ khử nước được ứng dụng cho bảo quản

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions from 23 to 30.

SCREEN TIME: MENTAL HEALTH MENACE OR SCAPEGOAT?

    "Have smartphones destroyed a generation?" Jean Twenge - a psychology professor at San Diego State University - asked in her controversial book, iGen. In the book, she argues that those born after 1995 are facing "a mental-health crisis", and she believes it can be linked to growing up with their noses pressed against a screen. Her newest study provides more support for that connection, showing that teens who spent more than an hour or two a day interacting with their gadgets were less happy on average than those who had more face time with others.

    Twenge's conclusions have come up against criticism in the past. Some have accused her work of oversimplifying or overlooking data that may tell a slightly different story. Twenge recognises that her study suggests only a link between screen use and psychological well-being. A possible explanation is that kids are running to their screens to escape from the things in life that are making them unhappy. However, the surveys can't say whether screen time directly changes teens' mental health, the research states.

    Philanthropist Melinda Gates, whose three children were also born after 1995, wrote in The Washington Post, "phones and apps aren't good or bad by themselves, but for adolescents who don't yet have the emotional tools to overcome life's problems, they can aggravate the difficulties of growing up."

    At the same time, she said, kids are learning on their devices and connecting in novel ways. Other studies have explored the connection between social media and isolation and how "likes" activate the brain's reward centre. Some analyses have found that moderate use of these technologies is not harmful in itself and can even improve children's social skills and build emotional strength.

Which of the following is NOT mentioned as a factor contributing to the mental-health crisis in the passage?

Mark the letter A, B, C, or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 13 to 17

a. Oh, that’s too bad. Was it stolen?

b. Not good. I lost my wallet.

c. No, I think it came out of my pocket when I was in the taxi.

d. Hey, how’s it going?

Tập nghiệm của bất phương trình $-x+7\ge 0$ là

Theo phạm vi địa lí, mạng máy tính chia thành mấy loại?

Tọa độ tâm I và bán kính R của đường tròn (C):(x−1)² + (y+3)² = 16 là:

Đâu là lưu ý khi viết bài văn nghị luận phân tích, đánh giá một tác phẩm truyện kể? (Chọn 3 đáp án)

Chọn ý đúng: Tài nguyên có thể khôi phục được bao gồm?

Read the following leaflet and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 7 to 12.

MAKE A DIFFERENCE – VOLUNTEER TODAY!

Let’s look at how volunteering can change lives and improve our community.

Facts and Figures:

Did you know that millions of people volunteer every year? Volunteers help in hospitals, schools, animal (7)________, and community centers. They bring people together, improve lives, and support those in need. Studies (8)________ that people who volunteer feel happier and more connected to their (9)________.

Positive Actions!

●      Find a cause you care about. (10)_________ it’s helping children, protecting the environment, or caring for animals, there are many ways to get involved.

●      Start small and be consistent. Even a few hours a month can make a big (11)________. Volunteering regularly helps build trust and strong connections with those you help.

●       Learn new skills and meet (12)________ people. Volunteering is a great way to gain experience and make friends, all while helping others.

Cho phương trình hóa học:

aZn + bH₂SO₄ (đặc) → cZnSO₄ + dH₂S­ + fH₂O.

Giá trị của b trong phương trình hóa học trên là

Nội dung nói về khẩu hiệu trong kinh tế nước ta là gì?

Trong không gian Oxyz, cho \(A(1;2;-3),B(3;-5;2)\). Tọa độ vectơ \(\overrightarrow{AB}\) là

1. Do you find yourself yawning all day at school? You probably need more sleep. However, it is not just how much sleep you get that is important. What you do before bedtime also has a huge effect on how you feel the next day. If you spend time chatting to someone on social media, or reading a book on your e- reader, you are not alone.

2. All devices' screens give out a large amount of blue light, which affects the body's production of the sleep hormone, melatonin, which can change your sleep patterns. So it is not just getting to sleep that becomes hard, but the quality of your sleep also suffers. The result is that you can wake up several times during the night, and have difficulty getting up in the morning.

3. Sleep is food for the brain, so not sleeping well can be a severe problem for anyone, especially for teenagers, because their brains are still developing. When you do not sleep well, it can be difficult to concentrate at school, which makes it harder to learn and get good grades. It can also affect your mood, making you feel sad or anxious.   

4. So, it is clear you should not use your phone before you go to sleep. Why not leave it in another room? Nothing on social media is so important that it cannot wait a few hours! You should rediscover paper books and enjoy feeling tired and sleepy before bedtime rather than wondering why your best friend has not liked your photo! How will you wake up? You do not have to use the alarm on your phone. Go and buy yourself an old-fashioned alarm clock! The negative effects that screen time is having on sleep have been in the news a lot recently, so manufacturers of smartphones and tablets have added a feature to the mobile devices that can help reduce these. Most new phones have a night-time setting that changes the colour of the screen so that it gives out less blue light. If you really cannot avoid going onto social media at bedtime, think about turning on this setting on your phone.

Which of the following is probably the author’s advice for a better bedtime?

Để khai báo dữ liệu kiểu xâu thì dữ liệu phải được khai báo trong cặp ngoặc nào sau đây?

Read the following passage about endangered languages and mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questionsfrom 31 to 40.

[I] Social media has become a dominant force in modern communication, offering a range of benefits and challenges. [II] It has revolutionized the way people interact, share information, and even form relationships. [III] While these platforms offer opportunities for connection and expression, they also have their drawbacks. [IV] For instance, excessive use of social media has been linked to a range of negative effects, including mental health issues, social isolation, and decreased productivity. [V] However, when used responsibly, social media can also offer a variety of positive outcomes, such as the ability to stay connected with loved ones, network professionally, and access valuable information and resources.

One of the major benefits of social media is its ability to keep people connected. For example, individuals who live far apart can maintain close relationships through regular communication on these platforms. Social media also facilitates professional networking, allowing users to connect with potential employers or clients, and enabling companies to promote their products and services to a global audience. Additionally, platforms like Facebook, Twitter, and Instagram provide a space for people to share ideas, opinions, and creative work, fostering a sense of community and collaboration.

Despite these advantages, there are serious concerns about the negative impact of social media, particularly on mental health. Studies have shown that excessive social media use can contribute to feelings of anxiety, depression, and loneliness. This is often attributed to the unrealistic portrayals of life that are commonly shared on these platforms, leading to comparisons that can make individuals feel inadequate or left out. Furthermore, constant exposure to negative news or online bullying can exacerbate these feelings and contribute to long-term psychological stress.

Another issue with social media is its potential to distract people from their daily responsibilities. With notifications constantly popping up and endless streams of content to scroll through, individuals may find it difficult to focus on tasks such as work, school, or personal obligations. This can result in decreased productivity and a lack of attention to important matters.

Ultimately, the impact of social media depends on how it is used. If individuals are mindful of their usage patterns and take steps to limit their time on these platforms, they can enjoy the benefits of staying connected and informed without the negative consequences. Parents, educators, and mental health professionals can also play a role in helping young people develop healthy habits and manage their social media use effectively.

According to passage, which of the following is NOT a benefit of social media? 

Chức năng nào để điều chỉnh màu sắc cho bức ảnh?

Hãy cho biết: Khối thứ tư trong sơ đồ khối mạch điều khiển tín hiệu là gì?