Trong thí nghiệm chứng minh quá trình vận chuyển nước ở thân, có thể sử dụng hóa chất nào dưới đây?

Phương pháp nào sau đây thường dùng để biểu hiện loại đối tượng địa lí không phân bố ở mọi nơi trên lãnh thổ, mà chỉ tập trung ở một khu vực nhất định?

Biện pháp hóa học:

Để thành lập đội tuyển quốc gia môn tin học, người ta tổ chức một cuộc thi tuyển gồm 3 vòng. Vòng thứ nhất lấy 60% thí sinh dự thi, vòng thứ hai lấy 20% thí sinh đã qua vòng thứ nhất và vòng thứ ba lấy 10% thí sinh đã qua vòng thứ hai. Để vào được đội tuyển, thí sinh phải vượt qua được cả ba vòng thi. Xác suất một thí sinh dự thi bất kì:

Công suất là đại lượng

Khi sử dụng lại các thông tin trên mạng cần lưu ý đến vấn đề nào?

Điểm nào sau đây thuộc miền nghiệm của hệ bất phương trình $\left\{ \begin{aligned} &2x-5y-1>0 \\ &2x+y+5>0 \\ &x+y+1<0 \\ \end{aligned} \right.$?

Dưới đây là sơ đồ đặc trưng của các cuộc cách mạng công nghiệp.

Thành phần (2) còn khuyết trong sơ đồ là

Trong những năm 1954 -1960, nhân dân miền Bắc Việt Nam thực hiện nhiệm vụ nào sau đây?

Tại sao các cây xương rồng, thuốc bỏng,… thường sinh trưởng và phát triển chậm hơn so với các cây thuộc nhóm thực vật C₃, C₄?

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 31 to 40.

Mountain Lions Amid Wildfires: A Struggle for Survival

Beth Pratt, the California director for the National Wildlife Federation, has spent her career protecting Los Angeles’ mountain lions. These top predators live in a rocky area surrounded by fancy houses and many roads. When wildfires destroy vast stretches of open land, the survival options for these animals become critically limited. “This is the LA area—these mountain lions can’t just move into the Kardashians’ backyard,” Pratt says, her voice filled with concern for the animals in such a difficult situation.

(I) The chaparral vegetation, covering about 10% of California, is one of the world’s most flammable ecosystems. (II) In Los Angeles, suburban sprawl intrudes on these areas, blocking wildlife escape routes. (III)Fires strip the land of food and shelter, transforming vibrant ecosystems into barren landscapes. (IV) Pratt highlights the urgency of the situation, explaining how areas that once supported life are now “taken out of commission,” leaving many species to starve or struggle for survival.

The consequences extend beyond wildlife. Wildfires have caused devastating human losses, with 88,000 people evacuated and a rising death toll of 25. Meanwhile, the non-human world suffers equally, particularly endangered species with limited ranges. Red-legged frogs, reintroduced into Santa Monica streams in 2014, are among the most affected, with their habitats repeatedly destroyed. The Woolsey Fire of 2018 was followed by mudslides that wiped out much of the region's delicate ecosystem, and scientists fear similar outcomes this time. California newts, reptiles, and snakes are also at high risk, while mammals and birds, although more likely to escape, face challenges in finding food and shelter as the ecosystem bounces back.

Despite the devastation, hope remains. The chaparral is a fire-adapted ecosystem, and life often endures beneath the soil. Seeds can survive and germinate quickly, with grasses sprouting weeks after the first rain. Shrubs may take up to a decade to recover, depending on rainfall. Prof. Stefan Doerr, an expert on wildfires, emphasizes the resilience of this landscape, noting its evolutionary adaptation to high-intensity fires occurring every 30 to 100 years. While the aftermath looks bleak, these fires play a role in maintaining biodiversity, offering a glimmer of hope for recovery.

Which of the following can be inferred from the passage?

Đường thẳng nào sau đây song song với đường thẳng \(y = \sqrt 3 x + 1\)?

Công nghệ thứ tư trong lĩnh vực điện – điện tử được đề cập đến là:

Cytokinin chủ yếu sinh ra ở vị trí nào của cây?

Máy tính kể từ thế hệ nào sau đây cần có hệ điều hành?

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 31 to 40.

A New Capital

When Pakistan was established as a new state in 1947, Karachi initially served as its capital. However, maintaining Karachi as the capital proved to be a challenge due to several disadvantages, such as its climate and the condition of the existing infrastructure. Rather than attempting to improve these issues, the government opted to create a completely new capital city. In 1959, a commission was formed to explore potential locations for this new capital. Dr. Doxiadis, a renowned architect and city planner, was appointed as the chief advisor to the commission.

Dr. Doxiadis and his team explored several possible sites for the new capital, considering both geographical and environmental factors. After a thorough evaluation, they narrowed the options down to two locations: one just outside Karachi and the other located north of Rawalpindi. Both sites had their own sets of advantages and drawbacks, making the decision a complex one.

The final choice was made after carefully considering a range of factors such as transportation, water availability, economic implications, and national interests. Ultimately, the area north of Rawalpindi was selected. On February 24, 1960, the new capital city was named Islamabad, and a comprehensive master plan for its development was created. The plan divided the area into three distinct sections: Islamabad itself, neighboring Rawalpindi, and a national park.

Each section was designed to serve a specific purpose. (I) Islamabad would function as the country’s political and cultural center, meeting the administrative needs of the nation. (II) Rawalpindi, located nearby, would continue as the regional hub for industry and commerce. (III) The national park area was intended to provide space for education, recreation, and agriculture, enhancing the quality of life for residents. (IV)

Today, Islamabad is a vibrant city with a population of around 1 million people. Known for its clean and healthy environment, it offers a pollution-free atmosphere, abundant water resources, and ample green spaces. Tree-lined streets, elegant public buildings, and well-planned shopping centers make the city a model of successful urban planning. With its efficient design and flourishing urban life, Islamabad stands as a prime example of well-executed city planning and growth.

Which of the following is NOT a factor considered when choosing the new capital city?

Mặt Trời lên thiên đỉnh ở chí tuyến Nam vào ngày nào?

Sao lưu cơ sở dữ liệu từ máy tính nguồn bằng cách?