Trong mô hình Bohr của nguyên tử hydrogen, electron quay theo quỹ đạo tròn với chu kì là \(1,50 \cdot {10^{ - 16}}\;{\rm{s}}.\) Biết \(|e| = 1,{60.10^{ - 19}}{\rm{C}}.\)

Cường độ dòng điện tương ứng với chuyển động quay này là

Nguyên nhân trực tiếp khiến thực dân Pháp quỵểt định đánh thẳng vào kinh thành Huế năm 1883 là

Đặc điểm của Hiến pháp nước Cộng hoà xã hội chủ nghĩa Việt Nam là gì?

Đâu là sản phẩm ổn định đầu tiên trong pha tối của nhóm thực vật C3?

Trong không gian Oxyz, cho tứ diện \(A B C D\) với tọa độ của các đỉnh như sau \(A(1; 3;-2), B(3; 2;-4), C(2,1,0), D(3; 5;-1)\).

Thể tích của khối tứ diện \(A B C D\) bằng:

Cho tập hợp $A = ( -\infty ; m - 1)$ và tập $B = ( 2; +\infty)$, giá trị của $m$ để $A \cap B = \varnothing$ là

Hai cạnh của hình chữ nhật nằm trên hai đường thẳng \(d_{1}: 4 x-3 y+5=0\) và \(d_{2}: 3 x+4 y-5=0\). Hình chữ nhật có đỉnh \(A(2 ; 1)\). Tính diện tích của hình chữ nhật.

Chọn một từ/ cụm từ mà từ loại của nó KHÔNG cùng nhóm với các từ/ cụm từ còn lại.

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 can be inferred from the passage?

Quy trình số hóa âm thanh được hiểu là

Công dân có các nghĩa vụ gì khi tham gia bầu cử, ứng cử?

Một chất điểm chuyển động có phương trình chuyển động là \(s=-{{t}^{3}}+6{{t}^{2}}+17t\), với \(t\) (s) là khoảng thời gian tính từ lúc vật bắt đầu chuyển động và \(s\) (m) là quãng đường vật đi được trong khoảng thời gian đó. Trong khoảng thời gian \(8\) giây đầu tiên, vận tốc \(v\) (m/s) của chất điểm đạt giá trị lớn nhất bằng bao nhiêu?

Hình tượng Nữ thần Mặt Trời trong sử thi Đăm Săn mang ý nghĩa gì?

Read the following passage about the Reimagining International Cooperation 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.

Global environmental governance is changing how countries work together. Nations now understand that pollution, climate change, and resource problems cross borders. Traditional agreements between countries are not enough anymore. New approaches include businesses, local communities, and citizen groups working with governments. This all-hands-on-deck approach helps create better solutions for our planet. Many successful projects show that when different groups cooperate, they can solve difficult environmental problems that single countries cannot fix alone.

Environmental governance faces many challenges today. [I] Political differences between nations often slow down important decisions. [II] Some countries worry that strict environmental rules might hurt their economic growth. Despite these obstacles, new technologies are helping countries monitor environmental changes better. [III] Satellite data and computer models allow scientists to track forest loss, ocean pollution, and climate patterns. [IV] This information helps leaders make smarter decisions about protecting natural resources.

The future of environmental governance depends on innovation. Digital platforms now connect environmental experts around the world instantly. Young people are bringing fresh ideas through social media campaigns and protest movements. Indigenous communities contribute valuable traditional knowledge about sustainable living practices. Financial institutions are creating new ways to fund green projects in developing countries. These combined efforts are creating a more flexible and responsive system of global cooperation that can adapt to changing environmental conditions more quickly than old-fashioned diplomatic channels.

Effective environmental governance requires balance between global standards and local solutions. While international agreements provide important frameworks, communities need freedom to implement approaches that fit their unique situations. Successful governance models respect cultural differences while maintaining scientific standards. Education plays a crucial role in building public support for environmental policies. When citizens understand environmental issues, they make better choices and hold their leaders accountable. The most promising path forward combines strong international institutions with energetic local action to create lasting environmental solutions.

The word “they” in paragraph 4 refers to _________.

Read the following passage about the Science in Service of Humanity 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.

Science has come out of its shell in laboratories to become a powerful force for human advancement. Modern scientific endeavors increasingly focus on addressing real-world challenges affecting communities globally. From developing vaccines that save millions to creating technologies connecting people across continents, science serves humanity in countless ways. This shift represents a fundamental evolution in how we perceive scientific progress—not merely academic pursuit but a practical tool for improving lives and solving pressing problems.

[I] Medical breakthroughs exemplify how science directly benefits humanity. [II] For instance, gene therapy offers hope for those with inherited conditions, while artificial intelligence helps diagnose diseases earlier and more accurately. [III] These advancements didn't happen overnight; scientists had to burn the midnight oil for years before achieving success. [IV] Their perseverance demonstrates that when science targets humanitarian goals, results can transform society profoundly.

Environmental science has emerged as another crucial domain where laboratory work translates into human welfare. Climate scientists provide data informing policy decisions affecting billions. Conservation biologists develop strategies to protect biodiversity, ensuring future generations benefit from natural resources. Agricultural researchers create drought-resistant crops helping communities withstand changing climate conditions. Despite these contributions, environmental science faces challenges including funding limitations, political resistance, and urgency of addressing accelerating climate change. Nevertheless, dedicated scientists continue their work, recognizing environmental health directly impacts human wellbeing.

The future of science in service of humanity looks increasingly collaborative and inclusive. Modern approaches incorporate diverse perspectives, including indigenous knowledge and community participation. Citizen science projects engage non-professionals in data collection, democratizing the scientific process. Open-access publishing makes research findings available to anyone with internet access, not just wealthy institutions. These developments suggest science's greatest potential lies in becoming more accessible and responsive to human needs. As we face complex global challenges, from pandemics to climate change, science serving humanity offers our best hope for a sustainable future.

Which of the following best summarises the passage?

Cho hàm số \(f(x) = \left\{ \begin{array}{l}\sqrt {x + 1} - 2\quad (x \ge - 1)\\3{x^2} - x + 1\quad (x < - 1)\end{array} \right.\). Tính giá trị của: \(2.f( - 3) - 4.f(0)\)?

Hormone nào có vai trò kích thích sinh trưởng và phát triển mạnh ở thời kì dậy thì ở nữ?

Nguyên tố Q có số hiệu nguyên tử bằng 14. Electron cuối cùng của nguyên tử nguyên tố Q điền vào lớp, phân lớp nào sau đây?

Read the following passage about human life expectancy 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.

Milu was born in a small village in the north of India, and never had the chance of going to school, because her family needed her to work. So she grew up never having learned to read or write. She was a little sad about it, but she didn't let it upset her too much, and tried to think about other things.

She went through life, never being able to do what she wanted, because she felt that if she couldn't read, then she was somehow less than everybody else. This meant that she didn't make many friends and didn't go out much. She thought people would think she was stupid, and she didn't want them to laugh at her.

When she was fifty-six, she got a job cleaning a school and when she had finished her work, she used to sit and watch the little kids do their lessons. She didn't realise that one of the teachers watched her while she watched the kids, and one day, as she was about to leave, the teacher asked her to sit in the class. The kids thought it was very funny, but the teacher patiently started Milu on her first lesson to learn to read.

That was a few years ago, and now Milu can read and write as well as any of the other kids. She still cleans the school because she likes her job, but she doesn't feel less than everybody else anymore. The teacher, who is now her friend, sometimes gives her a book to read and she learns about people living in other parts of the world.

She has a granddaughter who studies at the same school, and sometimes she helps her with her homework. Being able to do that makes her feel so happy that when she stays alone she has a little cry. When she was in her little village as a child, she would never have dreamt that one day she would be able to help her granddaughter with her homework. She owes gratitude to her teacher friend for the gift she was given.

The word ‘patiently’ in paragraph 3 is OPPOSITE in meaning to _____.

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