Số nghiệm nguyên của bất phương trình ${{\log }_{2}}\left(9-x \right)\le 3$ là

Một sợi dây căng ngang đang có sóng dừng. Sóng truyền trên dây có bước sóng λ. Khoảng cách giữa hai nút liên tiếp là

Read the following passage about the A Vision of a Harmonious Multicultural Society 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.

By 2050, our world will have undergone remarkable transformations in how different cultures coexist. The walls that once divided nations are vanishing into thin air as global citizens embrace diversity like never before. Technology will serve as the great equalizer, with translation devices making language barriers a thing of the past. In urban centers worldwide, neighborhoods will showcase architectural influences from multiple cultures, creating spaces where everyone feels at home regardless of their background. Public spaces will feature gardens with plants from different continents, symbolic of how various cultures can thrive together in one environment.

[I] Education systems will prioritize cultural literacy alongside traditional subjects. [II] Schools will teach world history from multiple perspectives rather than through a single cultural lens. [III] Students will routinely participate in virtual exchange programs, allowing them to form friendships with peers around the world without leaving their classrooms. [IV] Government policies will recognize that a harmonious multicultural society requires institutional support, with resources allocated to community centers where cultural exchange happens organically through shared meals, festivals, and collaborative art projects.

Economic systems will evolve to value diverse approaches to business and innovation. Companies will actively seek employees from varied backgrounds, recognizing that diverse teams create more innovative solutions. Traditional knowledge from indigenous communities will be respected and incorporated into sustainable development practices. The entertainment industry will produce content that authentically represents multiple cultures, moving beyond stereotypes to show the complexity within each tradition. Digital platforms will help preserve endangered languages and cultural practices through accessible archives and learning tools.

The greatest achievement of this harmonious world will be a new understanding of human identity. People will identify with multiple cultural traditions simultaneously without feeling conflicted about their loyalties. Holidays from various traditions will be celebrated collectively, creating new hybrid celebrations that honor multiple heritages. The concept of "us versus them" will gradually fade as people recognize shared values across different traditions. While challenges will remain, the dominant attitude will be one of curiosity rather than fear when encountering differences.

The word “their” in paragraph 1 refers to _________.

Hình ảnh thường thấy trong thơ hai-cư là gì?

“Where do you think Rooney is today?". "I have no idea. He _______________late."

Phát biểu nào đúng khi nói về vai trò của hô hấp?

Đặt điện áp u = 40cos100πt (V) vào hai đầu đoạn mạch có R, L, C mắc nối tiếp, trong đó cuộn cảm thuần có độ tự cảm L thay đổi được. Biết giá trị điện trở là 10Ω và dung kháng của tụ điện là $10\sqrt{3} \Omega$. Khi L = L1 thì điện áp giữa hai đầu cuộn cảm là $u_L=U_{L0}.cos\left(100\pi t+\frac{\pi }{6}\right) \left(V\right)$K. Khi $L=\frac{2L_1}{3}$ thì biểu thức cường độ dòng điện trong đoạn mạch là 

Tiến hành mạ bạc cho một huy chương bằng kim loại đồng (copper) theo sơ đồ minh họa bên.

Phát biểu đúng là:

Sông Nin là quà tặng cho quốc gia cổ đại nào ở phương Đông?

Trong dao động điều hòa x = 2Acos(2ωt + φ), giá trị cực tiểu của gia tốc là:

Trong hình thức sinh sản sinh dưỡng, cây con không được hình thành từ bộ phận nào?

Nghề thuộc ngành điện, điện tử và viễn thông là lĩnh vực quan trọng, chuyên ứng dụng các nguyên tắc toán học và khoa học để thiết kế, phát triển và vận hành các hệ thống liên quan. Người làm việc trong ngành này đảm nhiệm việc lắp đặt và điều khiển các hệ thống điện trong công nghiệp, cùng với việc quản lí và giám sát các mạng lưới điện tử và viễn thông. Ngành này đòi hỏi kiến thức chuyên môn cao và khả năng vận dụng sáng tạo trong quá trình xử lí các vấn đề kĩ thuật phức tạp.

Phát biểu dưới đây đúng hay sai?

Read the following passage about endangered languages and mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questionsfrom 31 to 40.

[I] Social media has become a dominant force in modern communication, offering a range of benefits and challenges. [II] It has revolutionized the way people interact, share information, and even form relationships. [III] While these platforms offer opportunities for connection and expression, they also have their drawbacks. [IV] For instance, excessive use of social media has been linked to a range of negative effects, including mental health issues, social isolation, and decreased productivity. [V] However, when used responsibly, social media can also offer a variety of positive outcomes, such as the ability to stay connected with loved ones, network professionally, and access valuable information and resources.

One of the major benefits of social media is its ability to keep people connected. For example, individuals who live far apart can maintain close relationships through regular communication on these platforms. Social media also facilitates professional networking, allowing users to connect with potential employers or clients, and enabling companies to promote their products and services to a global audience. Additionally, platforms like Facebook, Twitter, and Instagram provide a space for people to share ideas, opinions, and creative work, fostering a sense of community and collaboration.

Despite these advantages, there are serious concerns about the negative impact of social media, particularly on mental health. Studies have shown that excessive social media use can contribute to feelings of anxiety, depression, and loneliness. This is often attributed to the unrealistic portrayals of life that are commonly shared on these platforms, leading to comparisons that can make individuals feel inadequate or left out. Furthermore, constant exposure to negative news or online bullying can exacerbate these feelings and contribute to long-term psychological stress.

Another issue with social media is its potential to distract people from their daily responsibilities. With notifications constantly popping up and endless streams of content to scroll through, individuals may find it difficult to focus on tasks such as work, school, or personal obligations. This can result in decreased productivity and a lack of attention to important matters.

Ultimately, the impact of social media depends on how it is used. If individuals are mindful of their usage patterns and take steps to limit their time on these platforms, they can enjoy the benefits of staying connected and informed without the negative consequences. Parents, educators, and mental health professionals can also play a role in helping young people develop healthy habits and manage their social media use effectively.

Which of the following best summarizes paragraph 3?

Trong những năm 1918-1923, tình hình kinh tế phần lớn các nước tư bản chủ nghĩa như thế nào?