Là bạn thân của nhau, nhưng M cảm thấy có một số chuyện T vẫn giữ, không kể lại cho mình nghe. Do đó, M đã tìm tới anh V (kĩ sư công nghệ thông tin), nhờ anh V giúp mình đăng nhập vào tài khoản facebook của T để đọc tin nhắn mà T trao đổi với mọi người. Trong tình huống này, nếu là anh V, em nên lựa chọn cách ứng xử nào sau đây?

Thị trường bao gồm bao nhiêu chức năng chủ yếu?

Thả một vật rơi tự do từ độ cao 90m. Lấy \(g = 10m/{s^2}\). Bỏ qua sức cản của không khí. Ở độ cao mà ở đó động năng cửa vật lớn gấp đôi thế năng?

Một người đứng ở một vách đá nhô ra biển và ném một hòn đá theo phương ngang xuống biển với tốc độ 16 m/s. Vách đá cao 70 m so với mặt nước biển. Lấy g = 9,8 m/s². Sau bao lâu thì hòn đá chạm vào mặt nước?

Trong điều kiện thực nghiệm tối ưu, 1 phân tử glucose trải qua hô hấp hiếu khí có thể tạo ra bao nhiêu ATP?

a. Naomi: I saw a program about coral bleaching. It looks so sad.

b. Naomi: That's terrible for all the fish and other animals that live there.

c. Leila: It happens when the water gets too warm. The coral loses its colour and can die.

Tập nghiệm của bất phương trình $6^{2x+1}\ge 6^{x^2-3x+7}$ là?

Cơ quan thoát hơi nước chủ yếu ở cây là

Read the passage carefully. Choose an option (A, B, C, or D) that best answers each question from to 646 to 650:

1. Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.

2. The explosion in mobile phone use around the world has made some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health.

3. On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. Signs of change in the tissues of the brain and head can be detected with modern scanning equipment. In one case, a traveling salesman had to retire at young age because of serious memory loss. He couldn't remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer's doctor didn't  agree.

4. What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.

5. As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it's wise not to use your mobile phone too often.

What is the word “potentially” in paragraph 4 closet in meaning to?

Số giá trị nguyên của \(m\) để hàm số \(y=\sqrt{1-m^{2}+2 m \sin x}\) xác định trên đoạn \(\left[0 ; \frac{\pi}{2}\right]\) là

Thiết diện qua trục của một hình nón là tam giác đều cạnh bằng 2. Một mặt cầu có diện tích bằng diện tích toàn phần của hình nón. Ta có bán kính mặt cầu đó bằng?

Điện thoại thông minh được kết nối với Internet bằng cách nào?

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

URBANISATION: A GROWING PHENOMENON

     Urbanisation is the process through which cities grow, and higher populations begin to inhabit urban areas. This phenomenon has accelerated significantly over the past few decades due to various factors. One of the primary drivers is the search for better employment opportunities. In rural areas, job prospects are often limited to agriculture and small-scale industries, which might not provide sufficient income. Consequently, people migrate to cities seeking better livelihoods and living standards.

     Additionally, urban areas offer more advanced educational facilities and healthcare services compared to rural regions. Many families move to cities to provide their children with higher-quality education and greater future opportunities. Access to hospitals and specialized medical services also attracts people to urban centers, especially in countries where rural healthcare is underdeveloped.

     However, rapid urbanisation brings about several challenges. Overcrowding in cities can lead to inadequate housing, strained infrastructure, and increased pollution. The expansion of urban areas often results in the loss of green spaces and agricultural land, impacting food production and the environment. Governments and city planners must address these issues to ensure sustainable urban growth.

     Despite these challenges, urbanisation has several positive aspects. Cities are often cultural melting pots, where diverse groups of people interact, leading to vibrant communities and innovation. The concentration of resources and talents in urban areas can drive economic growth and technological advancements.

Which of the following is NOT mentioned as a reason for urbanisation?

Nội dung nào dưới đây là một trong những vai trò của các ngành khoa học tự nhiên và công nghệ đối với Sử học?

Đâu là loại hình thất nghiệp được đề cập đến trong trường hợp dưới đây?

"Anh M sau thời gian nghỉ việc để điều trị bệnh nay đang làm hồ sơ xin việc và vẫn chưa tìm được việc làm".

Cho \(M = \{ x \in \mathbb{N}|x\) là bội của \(2\} \), \(N = \{ x \in \mathbb{N}|x\) là bội của \(6\} \), \(P = \{ x \in \mathbb{N}|x\) là ước của \(2\} \), \(Q = \{ x \in \mathbb{N}|x\) là ước của \(6\} \). Khẳng định nào đúng?

Hệ quy chiếu gồm

Có ba người cùng đi câu cá. Xác suất câu được cá của người thứ nhất là 0,5. Xác suất câu được các của người thứ hai là 0,4. Xác suất câu được cá của người thứ ba là 0,3.

Xác suất của biến cố có đúng hai người câu được cá bằng:

Read the following passage about the impact of social media on mental health 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 31 to 40.

[I] In recent years, social media platforms have become a central part of daily life, offering users countless ways to connect, share, and communicate. [II] While these platforms offer many advantages, experts have noted rising concerns about their effects on mental health, particularly among young people (Smith & Anderson, 2018). [III] Studies reveal that excessive social media use can contribute to feelings of anxiety, depression, and loneliness, despite its intention to promote connection and social interaction (Twenge & Campbell, 2019). [IV]

A primary reason for these mental health concerns is the tendency for social media users to compare themselves to others. Platforms like Instagram and Facebook often highlight idealized lifestyles, leading users to feel inadequate about their own lives. Additionally, the constant notifications and messages contribute to a "fear of missing out," or FOMO, which keeps individuals in a cycle of checking their phones, often reducing the quality of sleep and overall well-being.

There is also a growing body of research suggesting a link between social media use and decreased attention spans. When users frequently switch between apps and notifications, their ability to focus for extended periods may diminish (Rosen, 2019). This shift in attention can interfere with productivity, especially in academic and professional settings, where sustained focus is essential.

Addressing these challenges requires a multi-faceted approach. Some mental health professionals suggest limiting screen time and setting boundaries, such as "device-free" hours before bedtime. Others recommend engaging in offline activities, like reading or exercising, to reduce dependence on social media and build healthier habits. According to psychologists, such strategies can enhance mental resilience and allow for more meaningful, balanced relationships (Robinson & Smith, 2020).

The phrase "fear of missing out" in paragraph 2 could be best replaced by ____.

Thị trường ra đời từ khi nào sau đây?