Nhận định nào sau đây không đúng khi nói về luật quốc tế?

Vật nào dưới đây chịu biến dạng kéo?

Phương pháp bản đồ - biểu đồ thường sử dụng những biểu đồ nào để thể hiện lên bản đồ kinh tế?

Biểu đồ tròn

Biểu đồ miền

Biểu đồ cột

Biểu đồ đường

Khoáng sản nổi bật ở khu vực Mỹ Latinh không phải là gì?

Read the following passage 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.

SCREEN TIME: MENTAL HEALTH MENACE OR SCAPEGOAT?

    "Have smartphones destroyed a generation?" Jean Twenge - a psychology professor at San Diego State University - asked in her controversial book, iGen. In the book, she argues that those born after 1995 are facing "a mental-health crisis", and she believes it can be linked to growing up with their noses pressed against a screen. Her newest study provides more support for that connection, showing that teens who spent more than an hour or two a day interacting with their gadgets were less happy on average than those who had more face time with others.

    Twenge's conclusions have come up against criticism in the past. Some have accused her work of oversimplifying or overlooking data that may tell a slightly different story. Twenge recognises that her study suggests only a link between screen use and psychological well-being. A possible explanation is that kids are running to their screens to escape from the things in life that are making them unhappy. However, the surveys can't say whether screen time directly changes teens' mental health, the research states.

    Philanthropist Melinda Gates, whose three children were also born after 1995, wrote in The Washington Post, "phones and apps aren't good or bad by themselves, but for adolescents who don't yet have the emotional tools to overcome life's problems, they can aggravate the difficulties of growing up."

    At the same time, she said, kids are learning on their devices and connecting in novel ways. Other studies have explored the connection between social media and isolation and how "likes" activate the brain's reward centre. Some analyses have found that moderate use of these technologies is not harmful in itself and can even improve children's social skills and build emotional strength.

Which of the following best paraphrases the underlined sentence in paragraph 4?

Trong mặt phẳng \(O x y\), cho đường tròn \((C)\) có phương trình \(x^{2}+y^{2}-6 x+2 y+6=0\) và hai điểm \(A(1;-1), B(1; 3)\).

Qua B kẻ được hai tiếp tuyến với \((C)\) có phương trình là:

Read the following passage about the future of energy and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions.

     [I] As the world grapples with the finite nature of fossil fuel reserves and the detrimental impact of climate change, the future of energy undeniably lies in renewable sources. [II] Scientists and engineers are making substantial advancements in the development of technologies that more efficiently harness solar, wind, hydro, and geothermal energy. [III] Although the transition to these renewable sources presents significant challenges, it is also regarded as a pivotal step towards establishing a sustainable and resilient energy system. [IV]

     One of the most promising advancements in renewable energy is the enhancement of solar panel efficiency. Progress in photovoltaic technology has led to the creation of panels that convert a higher proportion of sunlight into electricity. Likewise, wind turbines are becoming more and more efficient. They are capable of generating power even under low-wind conditions. These innovations are essential for making renewable energy more feasible and accessible to a broader population.

     However, the transition to renewable energy is fraught with obstacles. The intermittent nature of sources like solar and wind necessitates reliable storage solutions to ensure a consistent power supply. Although battery technology has seen significant improvements, further advancements are imperative to meet growing demand. Moreover, new infrastructure for distributing renewable energy requires expansion and upgrading to accommodate these new power sources.

     The economic impact of transitioning to renewable energy is another critical consideration. While the initial investment in renewable energy infrastructure can be substantial, the long-term benefits include reduced energy costs and job creation in the green energy sector. Governments and private enterprises are increasingly acknowledging the necessity of investing in renewable energy projects, which is crucial for fostering innovation and diminishing reliance on fossil fuels.

     Ultimately, the future of energy hinges on our capacity to innovate and adapt. By continuing to invest in research and development, improving infrastructure, and addressing economic and technical challenges, we can transition towards a more sustainable and environmentally friendly energy system.

Which of the following best summarises paragraph 3?

Một trong những ý nghĩa của công cuộc Đổi mới ở Việt Nam từ năm 1986 là

Cuộc khởi nghĩa chống Pháp nào ở Lào, kéo dài suốt hơn 30 năm đầu thế kỉ XX?

Một loại nguyên tử hydrogen có cấu tạo đơn giản nhất, chỉ tạo nên từ 1 electron và 1 proton. Những phát biểu nào sau đây là đúng khi nói về nguyên tử hydrogen?

Cho \(\sin \alpha =\frac{-4}{5}\) và \(\pi <\alpha <\frac{3\pi }{2}\). Giá trị của \(\cos \alpha \) là?

Mùa đông đỡ lạnh, mùa hạ đỡ nóng, thường có mưa to và bão là đặc điểm khí hậu ở đâu?

Mỗi công dân cần làm gì để thực hiện đúng với nghĩa vụ tuân thủ Hiến pháp?

Cuộc cách mạng công nghiệp lần thứ hai diễn ra trong khoảng thời gian nào? 

Hoạt động tiêu dùng bao gồm mấy loại chính?

Đảo nào dưới đây nằm ở phía Bắc của Nhật Bản?

Nguyên tử potassium (K) có 19 electron; 19 proton và 20 neutron. Số khối nguyên tử của K là

Cho tam giác \(A B C\) có độ dài các cạnh là \(A B=5, B C=6, C A=7\).

Độ dài đường cao kẻ từ \(A\) của tam giác \(A B C\) là

Tần số quét của màn hình là gì?