Trong không gian với hệ tọa độ , cho đường thẳng . Vectơ nào dưới đây là một vectơ chỉ phương của ?

Điều kiện để tam thức bậc hai \(a{x^2} + bx + c(a \ne 0)\) nhận giá trị âm với mọi \(x \in \mathbb{R}\) là?

Một người đi thang máy từ tầng G lên tới tầng cao nhất của toà nhà cách tầng G 80 m, rồi đi xuống tầng hầm cách tầng G 5 m. Độ dịch chuyển và quãng đường đi được của người đó trong cả chuyến đi lần lượt là

Thời gian chạy 50m của 20 học sinh được ghi lại trong bảng dưới đây:

Số trung bình cộng thời gian chạy của học sinh là:

Di cốt Người tối cổ được tìm thấy đầu tiên ở những khu vực nào?

Tại sao khi trời nóng thì cơ thể chóng khát?

1. Trời nóng mất nhiều mồ hôi làm tăng áp suất thẩm thấu của máu.

2. Áp suất thẩm thấu của máu tăng kích thích vùng dưới đồi thị gây ra cảm giác khát.

3. Trời nóng làm cho cơ thể nóng nên cần nhiều nước để hạ nhiệt độ gây ra cảm giác thiếu nước và khát.

4. Trời nóng mất nhiều mồ hôi làm giảm áp suất thẩm thấu của máu.

Đáp án đúng là

Hoạt động tiêu dùng có vai trò như thế nào đối với sản xuất, phân phối - trao đổi?

Read the following passage about peer pressure and mark the letter A, B, C, or D to indicate the best answer to each of the following questions from 23 to 30.

Peer Pressure Among Youth

    Peer pressure can be particularly prevalent among teenagers, who are at a vulnerable stage of development and seeking their identity. It is a powerful force that can significantly impact the thoughts, actions, and behaviors of teenagers. During adolescence, individuals strive for acceptance and belonging, making them particularly susceptible to the influence of their peers. Understanding the nature of peer pressure and its effects is essential for supporting teenagers in navigating this challenging aspect of their social lives.

    One aspect of peer pressure is the pressure to conform to the norms and expectations of a social group. Teenagers may feel compelled to adopt certain behaviors, preferences, or attitudes to fit in and avoid social rejection. This conformity can range from relatively harmless choices, such as fashion trends, to more concerning behaviors, such as substance abuse or risky activities.

    Peer pressure can manifest in both explicit and implicit ways. Direct peer pressure involves explicit requests, invitations, or demands from peers to engage in specific actions or behaviors. Indirect or implicit peer pressure, on the other hand, is more subtle and involves observing others’ behaviors and feeling pressured to conform without any explicit requests. This type of pressure can be equally influential and difficult for teenagers to navigate.

    It is important to note that peer pressure can have positive or negative implications. Positive peer pressure can motivate teenagers to engage in healthy behaviors, such as participating in sports, pursuing academic goals, or engaging in community service. However, it can lead to risky or harmful behaviors, such as substance abuse, delinquency, or academic underachievement.

    Parents, educators, and mentors play a crucial role in helping teenagers navigate peer pressure. By fostering open and supportive relationships, adults can provide a safe space for teenagers to discuss their experiences and concerns. Promoting critical thinking, assertiveness skills, and self-confidence can empower teenagers to resist negative peer

pressure and make independent, healthy choices.

(Adapted from Peer Pressure: Its Influence on Teens and Decision Making)

Theo quy định pháp luật, tình huống nào sau đây được ứng cử đại biểu Quốc hội và đại biểu Hội đồng nhân dân các cấp?

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.

Where in paragraph 2 does the following sentence best fit?

These experiences will foster deep cross-cultural understanding from an early age.

Bộ luật nào được ban hành dưới thời Lê sơ?

Nhân dân Việt Nam tiến hành kháng chiến chống thực dân Pháp nhằm mục đích nào sau đây?

Một vật dao động điều hòa với phương trình $x=2\cos\left(\pi t+\dfrac{\pi}{2}\right)$ (cm). Chu kì của dao động là

Khi lá cây bị vàng, đưa vào gốc hoặc phun lên lá ion nào sau đây thì lá cây sẽ xanh lại?