Giá trị lớn nhất của biết thức F(x,y) = x + 2y với điều kiện $\left\{\begin{array}{c}0\le y\le 4\\ x\ge 0\\ x-y-1\le 0\\ x+2y-10\le 0\end{array}\right.$ là

Lá của một cây thủy sinh khi chìm trong nước thì nhỏ, dài và nhọn, lá nổi trên mặt nước lại có dạng bản rộng, to tròn. Ví dụ trên minh họa cho biến dị nào?

Vì sao nhà nước phải thu thuế gián thu?

Ý nào dưới đây là nói về thuế gián thu?

Phương pháp ............... biểu hiện cho dòng biển trên các đại dương

Hiện tượng nào là hệ quả chuyển động tự quay quanh trục của Trái Đất?

Sự kiện nào đã “phá vỡ trận tuyến” của chủ nghĩa tư bản, làm cho nó không còn là hệ thống hoàn chỉnh, duy nhất trên toàn thế giới?

Cho hai tập hợp $A=\left(1;5 \right]; \, B=\left(2;7 \right]$. Tập hợp $A\backslash B$ là

Một trong những điểm hạn chế của giáo dục, thi cử nước ta ở các thế kỉ XVI đến XVIII là gì? 

Cho hai biến cố \(A\) và \(B\), với \(P\left( A \right)=0,6\), \(P\left( B \right)=0,7\), \(P\left( A|B \right)=\frac{3}{7}\). Tính\(P\left( A\cap B \right)\).

Read the following passage about green living 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

          Green living refers to a lifestyle that promotes sustainability and environmental consciousness. This way of life encourages individuals to make choices that reduce their carbon footprint and conserve natural resources. Practices such as recycling, using renewable energy sources, and reducing waste are fundamental aspects of green living. By adopting these practices, individuals can contribute to the preservation of the environment and promote a healthier planet for future generations.

          One significant component of green living is the use of renewable energy sources. Solar, wind, and hydroelectric power are examples of renewable energy that can replace fossil fuels. Using renewable energy reduces greenhouse gas emissions and dependence on non-renewable resources. Additionally, renewable energy sources are often more sustainable and have less impact on the environment.

          Another important aspect of green living is sustainable consumption. This involves choosing products that are environmentally friendly and responsibly sourced. For example, buying locally produced food reduces the carbon footprint associated with transportation. Moreover, opting for products made from recycled materials helps conserve resources and reduce waste.

          Green living also emphasizes the importance of conserving water and energy. Simple actions such as turning off lights when not in use, fixing leaks, and using energy-efficient appliances can significantly reduce energy and water consumption. These practices not only benefit the environment but also save money on utility bills.

          Education and awareness play a crucial role in promoting green living. By educating individuals about the benefits of sustainable practices and how to implement them, communities can foster a culture of environmental responsibility. Awareness campaigns, workshops, and educational programs are effective ways to encourage people to adopt green living practices.

The word "renewable" in paragraph 2 is closest in meaning to:

CPU được cấu tạo từ hai bộ phận chính là?

Ví dụ nào sau đây không phải đặc điểm thích nghi ở sinh vật?

Cho tứ diện ABCD có \(DA \bot \left( {ABC} \right)\), ABC là tam giác cân tại A. Gọi M là trung điểm của BC. Gọi G, K lần lượt là trọng tâm của tam giác ABC và DBC. Góc giữa hai đường thẳng GK và AB bằng?

Read the following passage about Choosing a career and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 18 to 22.

          Choosing a career is a significant decision (18) _________. However, choosing a career can be a daunting task. To make an informed decision, it is essential to consider various factors, such as personal interests, skills, and values.

          One of the most important factors to consider is personal interests. (19) _________. By pursuing a career that aligns with your passions, you are more likely to be motivated and satisfied.

          Another important factor is skills and abilities. Self-awareness is the key to (20) _________. Identifying your strengths and weaknesses can help you choose a career path that suits your skills and talents.

          In addition to personal interests and skills, it is crucial to consider the job market and industry trends. (21) _________. Researching different career paths and staying up-to-date on industry developments can help you make informed decisions.

          To make the most of your career journey, it is essential to be proactive and take steps to develop your skills and network with professionals in your desired field. (22) _________. By continuously learning and adapting, you can increase your chances of success.

Thụ tinh trong tiến hóa hơn thụ tinh ngoài, là vì sao?

Tình huống nào sau đây đã vi phạm quyền và nghĩa vụ của công dân trong tham gia quản lí nhà nước và xã hội?

Read the following advertisement and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 1 to 6.

Discover Our Luxurious Eco-Friendly Yoga Mats!

Are you looking for the (1)________yoga mat? 

 Our mats are made from natural materials that are not only sustainable but also incredibly durable.

Experience the comfort of our thick blue (2)_________. It provides the perfect surface for all your yoga needs, whether you’re a beginner or an expert.

Many customers have shared how our mats have transformed their practice, (3)__________ them to achieve greater balance and flexibility. Join our community and see the difference! You can show yoga (4)________your friends with our mats every day.

(5)_________advantage of this opportunity to enhance your yoga experience!

Loving (6)_________ yoga is essential for maintaining a healthy lifestyle, and using our mats will help you achieve that.

Cho tập hợp $A=\left[ -2;2 \right]$. Tập hợp $A \cap \mathbb{N}$ bằng

Nguyên tử nguyên tố X có hai lớp electron, trong đó có 1 electron độc thân. X có thể là