Cho hình chóp \(\mathrm{S}. \mathrm{ABCD}\) có đáy \(ABCD\) là hình bình hành. Mặt phẳng \((\alpha)\) qua \(BD\) và song song với \(SA\), mặt phẳng \((\alpha)\) cắt \(SC\) tại \(K\). Tính tỉ số \(\frac{S K}{K C}\).

Hệ quản trị cơ sở dữ liệu (CSDL) là phần mềm như thế nào?

Môn Địa lí ở trường phổ thông bắt nguồn từ khoa học nào?

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 20 to 27.

Traditional Media

Before the invention of newspapers, the main source of news was word of mouth. Any writings and drawings were done by hand. Although printing presses had existed in eastern Asia, it was Gutenberg’s invention in Europe in 1453 that made printing faster and books more accessible. It reduced the cost and size of printed books and made them the first form of mass media affordable to less wealthy people. Gutenberg’s invention also quickened the spread of discoveries and information, and promoted literacy in Europe.

The printing press led to the rise of printed newspapers that appeared regularly. The first newspapers developed from around 1612 and in a short period of time, they became very popular in Europe and the European colonies. In the 19th century, they also appeared in Asia.

Newspapers and magazines are still very popular today. Although most of them have online versions, many people continue to read print media, which is considered more credible than digital media.

In the 1920s, when radio, television, and video were introduced, the phrase “the media” began to be used. Black and white television quickly became popular in the 1950s, and in the 1960s colour broadcasts started in many countries. Thanks to its audiovisual presentation, television became one of the most important forms of mass media in the 20th century. As a source of news, entertainment, and education, it still attracts a large number of viewers today.

(Adapted from English Workbook 12 – Global Success)

In which paragraph does the writer explain why the cost of a type of media decreased?

Các cồn (cù lao) sông là kết quả trực tiếp của quá trình gì?

Một vật có khối lượng 1kg và động lượng 2kgm/s. Khi đó động năng của vật bằng

Miền nghiệm của bất phương trình \(-3x+y+2\le 0\) không chứa điểm nào sau đây?

Xã hội bắt đầu phân chia giai cấp bắt nguồn từ đâu?

Căn cứ thứ hai để lựa chọn nghề nghiệp trong lĩnh vực công nghệ là:

Một vật nhỏ khối lượng m=2kg trượt xuống một đường dốc thẳng, nhẵn tại một thời điểm xác định có vận tốc 3m/s, sau đó 4s vật có vận tốc 7m/s, tiếp ngay sau đó 3s vật có động lượng là

Tập hợp $A = \{6; \, 7; \, 8; \, 9\}$ có tất cả bao nhiêu tập hợp con gồm $3$ phần tử?

Cho hai tập hợp $A=\left\{ 1;2;3;7 \right\}\text{,}\ B=\left\{ 2;4;6;7;8 \right\}$. Mệnh đề nào sau đây đúng?

Hoạt động có mục đích và ý thức của con người nhằm tạo ra sản phẩm phục vụ cho các nhu cầu của đời sống xã hội được gọi là gì?

Đổi số đo cung \(\frac{5}{6}\text{rad}\) sang độ, phút, giây ta được?

Công dân cần làm những gì để thực hiện nghĩa vụ tuân thủ Hiến pháp?

Read the following passage about urbanization 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.

It's a widely held belief that cities harm the environment. For this reason, many developing countries have imposed restrictions on the movement of people from rural to urban areas and on the size of large cities. But there are problems with this viewpoint. Urbanization that is properly controlled can benefit the environment in a number of ways.

First, urbanization is a highly productive force due to the combination of economies of scale and positive externalities. Over 5.5 times as much is produced in Asia's cities as in its rural areas. Urban agglomeration makes it possible to use fewer resources to produce the same amount of work as non-urban areas. Urbanization therefore reduces the environmental impact. Urbanization is necessary because the service sector depends on a concentration of clients. The growth of service industries, which typically generate less waste than manufacturing, is another environmentally beneficial aspect of urbanization.

Second, for any given population, high urban density has no effect on the environment. According to urban economics studies, density is one of the most significant factors influencing energy consumption. In places with a high population density, public transportation may be more convenient and quicker. City dwellers are more likely to walk or ride a bike instead of drive. Third, the construction, upkeep, and operation of environmentally friendly public services and infrastructure, such as waste management, sanitation, and piped water, are considerably simpler and less expensive in urban areas. More people can now afford to use eco-friendly facilities and services thanks to urbanization.

Fourth, urbanization is driving the development of new technologies, including eco-friendly ones. Eco-friendly vehicles, utilities, and equipment are essential to the green economy's long-term survival. Asia's enormous market will support green innovations in cities because the region's enormous population will provide entrepreneurs with many incentives and opportunities to invest in the development of energy-efficient products. Last but not least, the improved standard of living brought about by urbanization has improved access to housing, food, healthcare, and education. Cities with more residents can invest more in infrastructure, which reduces traffic and improves public health. Urbanization fosters pro-environmental attitudes, especially among middle-class property owners, which greatly aid in the introduction and enforcement of environmental laws and regulations.

Any expanding city will inevitably incur expenses. People are moving in large numbers to Asian cities, and many companies have opened offices there to capitalize on this trend. Examples of industrial operations that contribute to urban sprawl and harm the environment include the generation of electricity, transportation, construction, trash, and waste disposal. Both the advantages and disadvantages of urbanization should be taken into account when assessing its effects on the environment.

Which of the following does the writer mention about elements impacting power usage?