Trong không gian với hệ tọa độ $Oxyz$, cho ba vectơ $\overrightarrow{a}=(5 ; 7 ; 2), \overrightarrow{b}=(3 ; 0 ; 1), \overrightarrow{c}=(-6 ; 1 ;-1)$. Tọa độ của vectơ $\overrightarrow{m}=3 \overrightarrow{a}-2 \overrightarrow{b}+\overrightarrow{c}$ là

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

URBANISATION: A GROWING PHENOMENON

     Urbanisation is the process through which cities grow, and higher populations begin to inhabit urban areas. This phenomenon has accelerated significantly over the past few decades due to various factors. One of the primary drivers is the search for better employment opportunities. In rural areas, job prospects are often limited to agriculture and small-scale industries, which might not provide sufficient income. Consequently, people migrate to cities seeking better livelihoods and living standards.

     Additionally, urban areas offer more advanced educational facilities and healthcare services compared to rural regions. Many families move to cities to provide their children with higher-quality education and greater future opportunities. Access to hospitals and specialized medical services also attracts people to urban centers, especially in countries where rural healthcare is underdeveloped.

     However, rapid urbanisation brings about several challenges. Overcrowding in cities can lead to inadequate housing, strained infrastructure, and increased pollution. The expansion of urban areas often results in the loss of green spaces and agricultural land, impacting food production and the environment. Governments and city planners must address these issues to ensure sustainable urban growth.

     Despite these challenges, urbanisation has several positive aspects. Cities are often cultural melting pots, where diverse groups of people interact, leading to vibrant communities and innovation. The concentration of resources and talents in urban areas can drive economic growth and technological advancements.

The word accelerated in paragraph 1 is OPPOSITE in meaning to ____.

Nghề cơ khí là lĩnh vực quan trọng trong sản xuất công nghiệp hiện đại. Các kĩ sư và thợ cơ khí không chỉ tham gia vào việc chế tạo các chi tiết máy móc mà còn góp phần bảo trì, sửa chữa các hệ thống cơ khí phức tạp. Nghề này đòi hỏi sự chính xác cao và khả năng sáng tạo trong việc tìm ra giải pháp cho các vấn đề kĩ thuật. Bên cạnh đó, cơ khí cũng góp phần vào việc bảo vệ môi trường thông qua các giải pháp tiết kiệm năng lượng và giảm thiểu khí thải trong quá trình sản xuất.

Cho hình chóp S.ABCD có đáy là hình bình hành tâm O. Giao tuyến của (SAD) và (SBC) là:

Hydrogen có ba đồng vị bền là $^1_1H$, $^2_1H$, $^3_1H$. Oxygen có ba đồng vị bền là $^{16}_8O$, $^{17}_8O$ và $^{18}_8O$. Số phân tử nước có thể được tạo thành từ các đồng vị trên là

Cho tập hợp $A = \{1; 2;3;4\}$, $B = \{0; 2; 4\}$, $C = \{0;1;2;3; 4;5\}$. Quan hệ nào sau đây là đúng?

Mẹ đưa võng ru con ngủ. Khi tay mẹ ngừng tác dụng vào võng thì dao động của võng là dao động

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 is identified as a significant challenge in the transition to renewable energy in the passage?

Ảnh hưởng xấu của bệnh đến:

Nội dung nào dưới đây là một trong những vai trò của các ngành khoa học tự nhiên và công nghệ đối với Sử học?

Nuôi cấy hạt phấn đơn bội, sau đó lưỡng bội hóa tạo tế bào lưỡng bội, tiếp tục nuôi cấy tế bào này để tạo cây lưỡng bội. Đây là một ứng dụng của