Trong các mệnh đề tương đương sau, mệnh đề nào sai?

Read the following passage about the Pathways from Today's Actions to Tomorrow's World 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.

As we stand at the crossroads of environmental decision-making, the actions we take today will shape our world in 2050. Scientists warn that we're skating on thin ice with current consumption patterns and carbon emissions. Global temperatures could rise by 2-4 degrees Celsius unless significant changes occur within the next decade. Many countries have pledged to achieve carbon neutrality by 2050, but these promises require immediate implementation. Individual choices in transportation, energy usage, and consumption can collectively influence whether future generations inherit a sustainable planet or face severe climate consequences.

[I] Technological innovation represents our greatest hope for addressing environmental challenges by 2050. [II] Renewable energy sources like solar and wind are becoming increasingly affordable, potentially replacing fossil fuels entirely within thirty years. [III] Electric vehicles may dominate transportation networks, while vertical farming could transform food production in urban areas. [IV] However, these technological solutions must be developed and deployed equitably to avoid creating new disparities between wealthy and developing nations.

Social structures will undergo dramatic transformation by 2050 as demographic shifts reshape communities worldwide. Aging populations in developed countries will necessitate new approaches to healthcare, retirement, and social support systems. Meanwhile, climate migration may force millions to relocate from vulnerable coastal and drought-prone regions. Education systems must evolve to prepare our students for jobs that don't yet exist, emphasizing their adaptability and lifelong learning. Cities will need to become more resilient, incorporating green spaces and sustainable infrastructure to support growing populations.

Economic models must fundamentally change by 2050 to balance prosperity with environmental responsibility. The traditional focus on continuous growth may shift toward measuring success through wellbeing indicators rather than GDP alone. Circular economy principles will likely replace linear production models, with products designed for reuse and recycling. Resource-sharing platforms may become more prevalent, reducing individual consumption while maintaining living standards. Companies implementing genuinely sustainable practices will thrive, while those clinging to environmentally harmful methods may disappear entirely. The transition presents both challenges and opportunities for businesses willing to embrace innovation and sustainability.

Which of the following best summarises paragraph 3?

Một vật được thả từ trên cao xuống đất và người ta đo được thời gian rơi của nó là 2,4 s. Bỏ qua sức cản không khí. Lấy g = 9,8 m/s². Độ cao của nơi thả viên bi so với mặt đất và vận tốc lúc chạm đất lần lượt là

Kĩ năng nào sau đây được xem là phức tạp hơn cả trong số các kĩ năng đã cho?

Trong tương lai, xu hướng phát triển ngành chăn nuôi của Việt Nam và trên thế giới là?

Nhóm thiết bị nào dưới đây thường được sử dụng trong nghiên cứu và học tập sinh học?

Ở người và động vật, chức năng bảo vệ cơ thể chống lại các tác nhân gây bệnh do đâu?

Học thuyết Tam dân ở Trung Quốc do ai khởi xướng?

Điểm khác biệt về khí hậu của Nam Bộ so với Duyên hải Nam Trung Bộ là

Cho m gam kim loại Na tác dụng với dung dịch HCl dư. Sau phản ứng thu được 6,72 lít H₂ (đktc). Giá trị  m là

Almost everyone _______ for home after they completed their tasks.

Tâm trạng của Xi-ta khi gặp lại Ra-ma như thế nào?

Cho các chất sau: CH₃NH₂, CH₃NHCH₃, (CH₃)₃N, CH₃CH₂NH₂. Số chất thuộc loại amin bậc I?

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).

Which of the following is TRUE according to the passage?

Từ Hán Việt gần giống với tiếng Trung Quốc ở phương diện

Cho tứ diện ABCD có: AB = AC = AD, góc BAC bằng góc BAD bằng 60o. Gọi M và N lần lượt là trung điểm của AB và CD.

Góc giữa hai mặt phẳng (ACD) và (BCD) là:

Phương án nào sau đây là ưu điểm của cơ chế thị trường?

Hoạt động nào được gọi là xã hội hóa?

Nơi nào diễn ra sự hô hấp mạnh nhất ở thực vật?