Số phân tử có trong 50 g nước tinh khiết là \(X \cdot {10^{24}}\) phân tử. Tìm X, viết kết quả gồm ba chữ số khác không.

Cho hình chóp $S.ABC$ có đáy là tam giác đều cạnh $2a$. Biết $SA=a\sqrt{3}$ và $SA$ vuông góc với mặt phẳng $(ABC)$. Khoảng cách từ điểm $S$ đến đường thẳng $BC$ bằng

Đâu không phải là vai trò của nước đối với cơ thể thực vật?

Read the following advertisement 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 1 to 6.

UNBREAKABLE SPIRIT: AN EVENING WITH NICK VUJICIC

We are thrilled to announce that (1) ______ Nick Vujicic will be visiting our community for an exclusive seminar (2) ______ to inspire, empower, and create lasting change. This once-in-a-lifetime event will offer attendees the opportunity to hear Nick's powerful story of resilience, faith, and perseverance firsthand. Born without limbs, Nick has transformed his circumstances into a source of (3) ______. He has spoken to millions of people around the globe, spreading messages of hope, and the courage to turn obstacles (4) ______ opportunities. Nick’s dynamic and engaging approach has (5) ______ a lasting impact on audiences of all ages and backgrounds. Participants will gain practical strategies for overcoming challenges, achieving personal and professional goals. This event is organized (6) ______ personal growth, motivate change, and cultivate unity. Join us for an unforgettable experience. Space is limited, so be sure to reserve your spot today!

Quốc hội thực hiện các chức năng gì?

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.

Where in paragraph 2 does the following sentence best fit?

Artificial intelligence systems will likely revolutionize resource management, reducing waste significantly across industries.

Người nói nên chọn đề tài cho bài thuyết minh về một vấn đề xã hội theo bốn tiêu chí nào?

Dãy nào sau đây gồm các đồng vị của cùng một nguyên tố hóa học?

Sinh trưởng sơ cấp của cây là gì?

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

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

HEALTHY EATING HABITS

Let's explore how we can improve our eating habits for a healthier lifestyle.

Facts and figures.

Many people consume much sugar and unhealthy fats every day. In fact, studies show that we (7) _____ over 200 grams of sugar daily, which can lead to (8) _____ health issues.

Positive actions!

• Choose whole foods and fresh products. This helps reduce the intake of (9) _____ additives that can be harmful to your health.

• (10) _____ buying sugary snacks, make your own healthy snacks at home! Preparing your meals can help control the (11) _____ of sugar and salt you consume.

• Drink plenty of water. Limit your intake of sugary drinks and (12) _____ to maintain a balanced diet.

Kết quả của các cuộc cách mạng tư sản là gì?

Nguyên tử X có 3 lớp electron, lớp thứ 3 chứa 4 electron. Số hiệu nguyên tử của X là