Tham dự Hội nghị I-an-ta (2-1945) gồm nguyên thủ ba cường quốc:

Cuộn cảm lõi không khí là loại linh kiện điện tử được thiết kế không sử dụng lõi từ mà chỉ có dây quấn trong không khí được biểu diễn như hình. Hình dạng phổ biến của cuộn cảm này thường là các vòng dây xoắn hình trụ hoặc hình lò xo, giúp tạo từ trường khi có dòng điện chạy qua. Đặc điểm nổi bật của cuộn cảm lõi không khí là không bị hiện tượng bão hòa từ phù hợp với các mạch cao tần.

Polime nào sau đây thuộc loại polime bán tổng hợp?

Hydrohalic acid có tính acid mạnh nhất là

Read the following passage about the Exploring The Universe 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 is a vast and fascinating field that seeks to understand the natural world and the universe beyond[I]. It encompasses various disciplines, including physics, chemistry, biology, and astronomy[II]. Each of these areas contributes to our understanding of complex phenomena, [III]. For instance, scientific research has led to significant breakthroughs in medicine, renewable energy, and environmental conservation[IV]. In this essay, we will explore the impact of science on our lives, particularly focusing on space exploration.

One of the most intriguing aspects of science is space exploration. Humans have always looked to the stars, wondering what lies beyond our planet. The launch of satellites and manned missions has allowed us to gather valuable information about the cosmos. For example, NASA's Mars Rover has provided insight into the potential for life on other planets. Through meticulous research and data collection, scientists can analyze soil samples and atmospheric conditions, paving the way for future explorations.

Space exploration also raises critical questions about our existence and the future of humanity. As we continue to advance technologically, the prospect of colonizing other planets becomes more plausible. This endeavor could serve as a solution to the challenges we face on Earth, such as overpopulation and resource depletion. However, ethical considerations must guide these efforts. We must ensure that we do not repeat the mistakes of history, such as the exploitation of natural resources and indigenous populations.

Moreover, scientific advancements have enabled us to develop technologies that enhance our understanding of the universe. Telescopes and space probes allow us to observe distant galaxies, study black holes, and uncover the mysteries of dark matter. Each discovery leads to new questions, further fueling our curiosity and drive for knowledge. The concept of the multiverse, for instance, challenges our understanding of reality and pushes the boundaries of scientific thought.

In addition to exploring the universe, science plays a crucial role in addressing pressing issues on Earth. Climate change, for example, is a significant concern that scientists are actively investigating. Through climate models and data analysis, researchers can predict future trends and propose solutions to mitigate the effects of global warming. Public awareness and education are essential in fostering a collective response to environmental challenges.

As we reflect on the wonders of science, it is clear that its contributions extend far beyond mere knowledge acquisition. Science empowers us to make informed decisions about our health, environment, and future. By fostering a culture of curiosity and critical thinking, we can inspire future generations to continue exploring the unknown.

Which of the following is NOT mentioned in the essay?

Diện tích rừng trên thế giới bị thu hẹp nghiêm trọng chủ yếu do đâu?

Điền số nguyên dương thích hợp vào chỗ trống.

Cho tứ diện \(ABCD\). Lấy hai điểm \(M,N\) lần lượt là trọng tâm của các tam giác \(ABC\) và \(ABD\). Cho các khẳng định sau:

1) \(MN//\left( BCD \right)\).

2) \(MN//\left( ACD \right)\).

3) \(MN//\left( ABD \right)\).

Trong các khẳng định trên, có (……) khẳng định đúng.

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 paraphrases the underlined sentence in paragraph 4?

Sucrose thường có nhiều ở những loại thực phẩm nào?

Chính sách nào sau đây được nhà Nguyễn thực hiện để mở rộng diện tích ruộng đất công? 

Auxin có vai trò như thế nào?

Khi thiết kế sản phẩm cho con người, có mấy yếu tố chính cần được quan tâm?

Một vật có khối lượng 0,1kg và động lượng 1kgm/s. Khi đó động năng của vật bằng

Chọn ý đúng: Loại sốt rét nào thường gây tử vong?

Phương án nào sau đây nêu đúng dạng nhị phân của số 57?

Công thức tính công suất điện của một đoạn mạch là

Biết nhiệt hóa hơi riêng của ethanol là 8,41.10⁵ J/kg. Nhiệt lượng cần để làm bay hơi hoàn toàn 0,5 kg ethanol là

Hóa học là ngành khoa học thuộc lĩnh vực

Trong chăn nuôi lợn công nghệ cao, công nghệ nào được ứng dụng trong xây dựng kiểu chuồng kín có hệ thống kiểm soát tiểu khí hậu tự động và chế tạo các trang thiết bị chăn nuôi như hệ thống cung cấp thức ăn, nước uống?