Trên mặt chất lỏng có hai nguồn dao động S₁ và S₂ cùng phương, cùng phương trình dao động $u=a\cos2\pi ft$. Bước sóng là $\lambda$. Khoảng cách giữa hai điểm liên tiếp trên đoạn S₁S₂ dao động với biên độ cực đại là

Ánh sáng tác động đến cây trồng thông qua yếu tố nào sau đây?

Một trong những nhiệm vụ cơ bản của đổi mới đối ngoại ở Việt Nam từ năm 1986 là

Diễn biến nào không có trong pha sáng của quá trình quang hợp?

Điền vào chỗ trống.

Vào năm 2022, tổng diện tích rừng nước ta là 14 790 nghìn ha. Tổng diện tích lãnh thổ nước ta là 331 690 km². Tính tỷ lệ che phủ rừng của nước ta vào năm 2022.

(Làm tròn đến số thập phân thứ nhất của %)

Đáp án:...........

Trong một khu rừng, người ta ước tính đang có 800 con hà mã, 1500 con cá sấu và 2100 con ngựa vằn. Tốc độ tăng trưởng của hà mã là \(4 \%\) mỗi năm, trong khi đó số ngựa vằn lại giảm \(3 \%\) mỗi năm. Số lượng cá sấu tăng \(2 \%\) mỗi năm.

Sau bao nhiêu năm số lượng cá sấu nhiều hơn số lượng ngựa vằn?

Phát biểu nào sau đây về sóng cơ học là không đúng?

Cường độ điện trường gây ra bởi điện tích Q = 5.10^-9C, tại một điểm trong chân không cách điện tích một khoảng 30 cm có độ lớn là

Lĩnh vực nào sau đây được thúc đẩy mạnh mẽ nhờ phát minh của Henry Cort?

Cho khai báo mảng sau: A = list(“3456789”). Để in giá trị phần tử thứ 2 của mảng một chiều A ra màn hình ta viết?

Tập nghiệm của bất phương trình \(x^2-x-12 \leq 0\) là?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer.

Global Issues: Gender Equality and Women’s Empowerment

Gender equality means that men and women have equal power and equal opportunities for financial independence, education, and personal development. Women's empowerment is a critical aspect of achieving gender equality. It includes increasing a woman's sense of self-worth, her decision-making power, her access to opportunities and resources, her power and control over her own life inside and outside the home, and her ability to effect change. Yet gender issues are not focused on women alone, but on the relationship between men and women in society. The actions and attitudes of men and boys play an essential role in achieving gender equality.

Education is a key area of focus. Although the world is making progress in achieving gender parity in education, girls still make up a higher percentage of out-of-school children than boys. Approximately one quarter of girls in the developing world do not attend school. Typically, families with limited means who cannot afford costs such as school fees, uniforms, and supplies for all of their children will prioritize education for their sons. Families may also rely on girls' labor for household chores, carrying water, and childcare, leaving limited time for schooling. But prioritizing girls' education provides perhaps the single highest return on investment in the developing world. An educated girl is more likely to postpone marriage, raise a smaller family, have healthier children, and send her own children to school. She has more opportunities to earn an income and to participate in political processes, and she is less likely to become infected with HIV.

Women's health and safety is another important area. HIV/AIDS is becoming an increasingly impactful issue for women. This can be related to women having fewer opportunities for health education, unequal power in sexual partnership, or as a result of gender-based violence. Maternal health is also an issue of specific concern. In many countries, women have limited access to prenatal and infant care, and are more likely to experience complications during pregnancy and childbirth. This is a critical concern in countries where girls marry and have children before they are ready; often well before the age of 18. Quality maternal health care can provide an important entry point for information and services that empower mothers as informed decision-makers concerning their own health and the health of their children.

A final area of focus in attaining gender equality is women's economic and political empowerment. Though women comprise more than 50% of the world's population, they only own 1% of the world's wealth. Throughout the world, women and girls perform long hours of unpaid domestic work. In some places, women still lack rights to own land or to inherit property, obtain access to credit, earn income, or to move up in their workplace, free from job discrimination. At all levels, including at home and in the public arena, women are widely underrepresented as decision-makers. In legislatures around the world, women are outnumbered 4 to 1, yet women's political participation is crucial for achieving gender equality and genuine democracy.

Why do girls still make up a higher percentage of out-of-school children than boys?

Nhận định nào đúng với dải đồng bằng ven biển của Cộng hòa Nam Phi?

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 can be inferred from the passage?

Giải các phương trình:\(2{{\sin }^{2}}x-\sqrt{3}\sin 2x-1=\sqrt{3}\sin x-\cos x\) 

Cho góc \(x\left(0^{\circ} \leq x \leq 180^{\circ}\right)\) thỏa mãn \(\cos x=\frac{1}{4}\). Giá trị của \(P=\frac{\tan ^{2} x-\tan x+3 \cot x}{\frac{1}{2 \cos x}-5 \tan x+30 \cot ^{2} x}\) là

Trồng cà chua áp dụng cho loại mô hình nào sau đây?

Tác động của nội lực đến địa hình bề mặt Trái Đất không dẫn đến hiện tượng gì?

Sau Chiến tranh thế giới thứ hai, vùng Tây Âu thuộc phạm vi ảnh hưởng của:

Vận tốc tự quay quanh trục của Trái Đất có đặc điểm nào sau đây?

Read the following passage about Singapore Science Centre 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.

The Singapore Science Centre, situated on a sprawling six-hectare site in Jurong, offers a captivating way to explore the wonders of science and technology. Here, visitors can engage with interactive exhibits that make learning both fun and memorable. Clap your hands, and colorful bulbs will light up; spin a wheel, and it will activate a fan. This engaging environment sparks curiosity and fuels the imagination of both children and adults.

The centre boasts more than four hundred exhibits across various fascinating topics, including solar radiation, communication, electronics, mathematics, nuclear energy, and evolution. These exhibits are designed to foster interest in science and technology among the public, making the centre a hub for educational exploration.

Notably, it is the first science centre to be established in Southeast Asia. Officially opened in 1977, the centre now welcomes an average of 1,200 visitors daily, highlighting its enduring popularity and educational value.

The exhibits are thoughtfully arranged across four main galleries: the Lobby, Physical Sciences, Life Sciences, and Aviation. To ensure a fresh and engaging experience, the exhibits are renewed annually, encouraging repeat visits. Visitors are encouraged to interact with the exhibits, as opposed to traditional “hands-off” policies in most museums. Here, pushing buttons, turning cranks, or pedaling mechanisms are all part of the fun and learning experience.

The Discovery Centre, added in 1985, is specially designed for children aged three to twelve, providing an exciting space for young minds to explore and experiment. Most recently, a stone-age exhibit was introduced, showcasing extinct animals and early human life, offering insights into prehistoric times.

With its interactive displays and immersive environment, the Singapore Science Centre continues to inspire a love for science and discovery, making it an unforgettable destination for learners of all ages.

Which of the following best paraphrases the underlined sentence?