Mệnh đề nào sau đây tương đương với mệnh đề P: “ABCD là hình vuông”.

Trong thiên nhiên cây tre có thể sinh sản bằng cơ quan nào?

Cho ba tập hợp \(A=\left( -3;-1 \right)\cup \left( 1;2 \right)\), \(B=\left( m;+\infty \right)\) và \(C\left( -\infty ;2m \right)\). Có bao nhiêu số nguyên \(m\) để \(A\cap B\cap C\ne \varnothing \)?

Chọn ý đúng: Chất dinh dưỡng chính có trong phân bón là gì?

Cho tứ diện ABCD. Gọi I, J là trọng tâm tam giác ABC, ABD. Tìm khẳng định đúng: 

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.

Biting into a ripe, juicy fruit brings a smile to many people’s faces. But eating that same fruit a week before it is ripe probably wouldn’t be as enjoyable! Unripe fruits are often hard and bitter, but that serves a purpose. The hard exterior of an unripe fruit protects the developing seed inside. After a seed fully develops inside the fruit, the fruit changes color, softens, and gets sweeter to become more attractive to animals and humans. These organisms eat the fruit and spread its seeds, ensuring the plant’s survival and regrowth.

But how does a fruit ripen? The ripening process involves many complex chemical reactions. When a fruit ripens, it goes through a chemical change. A chemical change happens when bonds within molecules break, and the atoms that once formed them regroup into new molecules. Chemical changes are irreversible. Once a fruit ripens, it cannot become unripe again.

One molecule responsible for this chemical change is ethylene. Ethylene (C2H4) is a colorless gas made up of carbon and hydrogen atoms. (I). It is a naturally occurring molecule in the atmosphere. (II). It is also an important plant hormone. (III). Plants release ethylene through the growing tips of roots, flowers, and ripening fruit. (IV). Although ethylene serves other purposes in plants, one of its main purposes is to trigger the chemical reactions that cause fruits to ripen. As the fruit matures, oxygen in the air helps stimulate the production of ethylene. This ethylene production is a signal that begins fruit ripening. For that reason, unripe fruits have low levels of ethylene, while ripe fruits have higher levels of ethylene. Most fruits produce ethylene and respond to ethylene in the atmosphere.

Although fruits require ethylene to ripen, different types of fruits respond to this molecule in two distinct ways: non-climacteric fruits and climacteric fruits. Non-climacteric fruits do not ripen after harvesting. They produce very little ethylene of their own. Climacteric fruits, on the other hand, continue to ripen after they are picked. These fruits produce a large amount of ethylene. Climacteric fruits can also speed up the ripening process of other fruits nearby since they release high levels of ethylene into the air.

Which of the following is OPPOSITE in meaning to exterior in paragraph 1?

Cho tam giác \(A B C\) có diện tích \(S\). Nếu tăng độ dài mỗi cạnh \(B C\) và \(A C\) lên hai lần đồng thời giữ nguyên độ lớn của góc \(C\) thì diện tích của tam giác mới là

Thời gian để electron chuyển động được một vòng là Y.10^-6 s. Tìm Y (làm tròn kết quả đến chữ số hàng phần mười).

Trong các câu sau, câu nào là mệnh đề?

Hàm số $y={\left|x\right|}^3-x^2+4$ có tất cả bao nhiêu điểm cực trị? 

Với giá trị nào dưới đây của \(m\) thì hàm số \(y=\text{cos}2x+mx\) đồng biến trên \(\mathbb{R}\)?

Chọn ý đúng: Giá thể trấu hun là: 

Tình huống truyện đặc biệt có tác dụng:

Viết phương trình đường thẳng \(\Delta \) đi qua điểm \(A\left( 4;-3 \right)\) và song song với đường thẳng \(d:\left\{ \begin{align} & x=3-2t \\ & y=1+3t \\ \end{align} \right.\)

Cho thông tin sau:

     Năm 2022, sản lượng thủy sản nước ta đạt 9 108 nghìn tấn, tăng 3,2% so năm 2021. Sản lượng thủy sản nuôi trồng đạt 5 233,8 nghìn tấn; trong đó sản lượng cá nuôi trồng đạt 3 503,4 nghìn tấn; sản lượng tôm nuôi trồng đạt 1 145,4 nghìn tấn. Khai thác thủy sản đạt 3 874,4 nghìn tấn, giảm 65,9 nghìn tấn so với năm 2021. Trong sản lượng khai thác, thủy sản biển đạt 3 670,6 nghìn tấn.

(Nguồn: Sách Niên giám thống kê năm 2022)

a) Năm 2022, sản lượng thủy sản khai thác nhỏ hơn sản lượng thủy sản nuôi trồng. 

b) Trong sản lượng thủy sản nuôi trồng năm 2022, sản lượng cá nuôi chiếm dưới 60%. 

c) Cơ cấu sản lượng thủy sản của nước ta từ năm 2021 đến năm 2022 có sự chuyển dịch theo hướng giảm dần tỉ trọng thủy sản nuôi trồng, tăng tỉ trọng thủy sản khai thác. 

d) Sản lượng thủy sản nước ta hiện nay tăng chủ yếu do đẩy mạnh đánh bắt xa bờ và nuôi trồng thủy sản, phát triển công nghiệp chế biến và dịch vụ.

Phương án nào sau đây không thuộc một trong những chức năng của thị trường?

Phát biểu nào sau đây không đúng với Vùng kinh tế trọng điểm phía Bắc?

Read of the following leaflet 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 7 to 12.

Diversity Unleashed: Your Passport to 2025

Join us for a global (7)_________ of cultures, ideas, and innovation!

Some travelers prefer adventure holidays, while (8)_________ enjoy relaxing at resorts. We offer both!

Our skilled teachers will help you (9)_________ basic language skills before your cultural exchange program. (10)_________ cultural differences, we explore unique perspectives through interactive workshops.

Experience culinary (11)_________ from six continents prepared by master chefs. (12)_________ of opportunities are available for networking with global professionals.

Diversity Unleashed 2025 - Discover, Connect, Transform!

Book your spot today:

Early Bird Registration: Until March 31, 2025

Regular Registration: April 1 - June 30, 2025

Website: www.diversity2025.com

Email: info@diversity2025.com

Phone: (555) 123-4567

Tập hợp $A$ gồm các số nguyên dương chẵn nhỏ hơn hoặc bằng $10$ là

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.

Which of the following is TRUE according to the passage?

Read the following passage about Edible Landscapes for Community Resilience 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.

Urban food forests are becoming popular in many cities around the world. These special gardens (18)_________. Food forests which contain fruit trees, berry bushes, and edible plants help people learn about growing food and nature. These community gardens provide fresh food; (19)_________. The food is free for everyone to harvest; this system builds community connections and food security. Many cities now support these projects, recognizing their benefits and (20)_________. Unlike traditional parks, food forests need less water and maintenance. They grow many different plants together, which helps protect against pests and diseases naturally. Children love visiting these spaces to pick berries and learn about where food comes from.

Climate change makes growing local food more important than ever. When communities grow food together, (21)_________. Food forests can help reduce the urban heat island effect by providing shade and cooling the air. They also support important pollinators like bees and butterflies that help all plants grow better. Some food forests include community kitchens (22)_________. These spaces become centers for education about healthy eating and traditional cooking methods. Elderly community members often share their knowledge of plants and recipes with younger generations. This creates valuable connections between different age groups and cultures.