Hệ điều hành nào được coi là hệ điều hành đầu tiên cho máy tính cá nhân?

Chuyển động của vật nào dưới đây có thể coi là chuyển động rơi tự do?

Điền thông tin thích hợp để hoàn thành bài tập sau:

Hợp chất A có công thức M₄X₃. Tổng số hạt proton, neutron và electron trong phân tử A là 214. Tổng số hạt proton, neutron, electron của [M]₄ nhiều hơn so với [X]₃ trong A là 106. Biết rằng số hạt proton, neutron trong nguyên tử thoả mãn điều kiện bền sau: $1\le\dfrac{N}{Z}\le1,5$, với N là số neutron, Z là số proton.

1. Công thức hoá học của A là .

2. Số electron độc thân của nguyên tử M là .

Lan: How was your weekend?

John: _____________.

Phát biểu nào không đúng khi nói về tia tử ngoại?

Vì sao phương thức chăn thả tự do vẫn còn khá phổ biến ở các vùng nông thôn ở nước ta?

Công dân vi phạm quyền tự do ngôn luận khi cố ý thực hiện hành vi nào dưới dây?

Ở mô hình chăn nuôi lợn gắn chip, mỗi con lợn nái được gắn số lượng chíp là:

Đâu không phải vai trò của quá trình thoát hơi nước?

Read the following passage about The Temple of Literature 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 18 to 22.

The Temple of Literature, also known as Văn Miếu, is a significant cultural and historical landmark of Việt Nam. ___(18)___, the temple is Việt Nam's oldest university. It was first constructed in 1070 during the reign of Emperor Lý Thánh Tông to serve as the country's center of learning and scholarship. For centuries, ___(19)___.

The temple is a source of national pride for the Vietnamese. ___(20)___, with its distinctive roofs and intricate carvings. The temple complex features five courtyards, each with its own unique features. ___(21)___, a series of buildings where Việt Nam's scholars were trained.

Today, the Temple of Literature is a popular tourist destination. It is particularly popular during the Vietnamese Lunar New Year, when students come to pray for good luck in their studies. ___(22)___. For those interested in Vietnamese history, architecture, or culture, a visit to the Temple of Literature is a must.

(Adapted from Explore New Worlds)

Phương án nào sau đây thể hiện rõ nhất ứng dụng của hệ nhị phân trong tin học?

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 ____.

Mục đích của chạy thận nhân tạo là gì?