Thông kê chiều cao các cây bạch đàn trong vườn ượm của một lâm trường theo bảng số liệu sau:

Trung vị của mẫu số liệu là:

Cho mệnh đề: “Nếu tam giác có hai góc bằng \({60^ \circ }\) thì tam giác đó là tam giác đều”. Mệnh đề đảo của mệnh đề đã cho là?

“Lúc bấy giờ, tôi vụt có một cảm giác rất lạ: cái bóng anh xe, người đầy cát bụi kia, nhìn từ phía sau, bỗng to dần ra. Anh càng bước tới, cái bóng càng to thêm, phải ngước lên mới nhìn thấy được, và dần dần cơ hồ biến thành một sức nặng đè lên người tôi đến nỗi làm cho cái 'thằng tôi nhỏ nhen', che giấu dưới lần áo da, như muốn lòi ra ngoài.”

(Lỗ Tấn, Mẩu chuyện nhỏ)

Cảm giác mà nhân vật "tôi" trải qua trong đoạn văn là gì?

Trong giao diện chỉnh sửa video, thành phần nào chứa các lệnh như sao chép, xoá và các lệnh căn chỉnh đối tượng khác?

Bộ phận nào sau đây của cây không tham gia vào sinh sản hữu tính ở thực vật?

Phát biểu đúng trong các phát biểu sau là?

Quan sát hình ảnh sau và cho biết đây là vành bánh xe của phương tiện nào?

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions:

            For many people who live in cities, parks are an important part of the landscape. They provide a place for people to relax and play sports, as well as a refuge from the often harsh environment of a city. What people often overlook is that parks also provide considerable environmental benefits.

            One benefit of parks is that plants absorb carbon dioxide - a key pollutant - and emit oxygen, which humans need to breathe. According to one study, an acre of trees can absorb the same amount of carbon dioxide that a typical car emits in 11,000 miles of driving. Parks also make cities cooler. Scientists have long noted what is called the Urban Heat Island Effect: building materials such as metal, concrete, and asphalt absorb much more of the sun’s heat and release it much more quickly than organic surfaces like trees and grass. Because city landscapes contain so much of these building materials, cities are usually warmer than surrounding rural areas. Parks and other green spaces help to mitigate the Urban Heat Island Effect.

            Unfortunately, many cities cannot easily create more parks because most land is already being used for buildings, roads, parking lots, and other essential parts of the urban environment. However, cities could benefit from many of the positive effects of parks by encouraging citizens to create another type of green space: rooftop gardens. While most people would not think of starting a garden on their roof, human beings have been planting gardens on rooftops for thousands of years. Some rooftop gardens are very complex and require complicated engineering, but others are simple container gardens that anyone can create with the investment of a few hundred dollars and a few hours of work.

            Rooftop gardens provide many of the same benefits as other urban park and garden spaces, but without taking up the much-needed land. Like parks, rooftop gardens help to replace carbon dioxide in the air with nourishing oxygen. They also help to lessen the Urban Heat Island Effect, which can save people money.

            In the summer, rooftop gardens prevent buildings from absorbing heat from the sun, which can significantly reduce cooling bills. In the winter, gardens help hold in the heat that materials like brick and concrete radiate so quickly, leading to savings on heating bills. Rooftop vegetable and herb gardens can also provide fresh food for city dwellers, saving them money and making their diets healthier. Rooftop gardens are not only something everyone can enjoy, they are also a smart environmental investment.

Question 36: Based on its use in paragraph 2, it can be inferred that mitigate belongs to which of the following word groups?

Giá trị lớn nhất của hàm số \(y=-{{x}^{4}}+4{{x}^{2}}\) trên đoạn \(\left[ -1;2 \right]\) bằng

Cho các giải pháp sau:

1. Điều trị ung thư bằng tế bào gốc

2. Thay thế, cấy ghép cơ quan

3. Nhân bản vô tính

4. Phòng bệnh bằng vacccine

5. Chữa bệnh bằng kháng thể đơn dòng

Bao nhiêu giải pháp được áp dụng trong khám chữa bệnh ở người?

Mục tiêu tổng quát của Cộng đồng ASEAN là

High interest rates ______________ people in capitalist countries from borrowing money.

Read the following passage about the impact of social media on mental health 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] In recent years, social media platforms have become a central part of daily life, offering users countless ways to connect, share, and communicate. [II] While these platforms offer many advantages, experts have noted rising concerns about their effects on mental health, particularly among young people (Smith & Anderson, 2018). [III] Studies reveal that excessive social media use can contribute to feelings of anxiety, depression, and loneliness, despite its intention to promote connection and social interaction (Twenge & Campbell, 2019). [IV]

A primary reason for these mental health concerns is the tendency for social media users to compare themselves to others. Platforms like Instagram and Facebook often highlight idealized lifestyles, leading users to feel inadequate about their own lives. Additionally, the constant notifications and messages contribute to a "fear of missing out," or FOMO, which keeps individuals in a cycle of checking their phones, often reducing the quality of sleep and overall well-being.

There is also a growing body of research suggesting a link between social media use and decreased attention spans. When users frequently switch between apps and notifications, their ability to focus for extended periods may diminish (Rosen, 2019). This shift in attention can interfere with productivity, especially in academic and professional settings, where sustained focus is essential.

Addressing these challenges requires a multi-faceted approach. Some mental health professionals suggest limiting screen time and setting boundaries, such as "device-free" hours before bedtime. Others recommend engaging in offline activities, like reading or exercising, to reduce dependence on social media and build healthier habits. According to psychologists, such strategies can bu mental resilience and allow for more meaningful, balanced relationships (Robinson & Smith, 2020).

The phrase "fear of missing out" in paragraph 2 could be best replaced by ____.

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 best paraphrases the underlined sentence: The ripening process involves many complex chemical reactions.

To participate in the competition, all participants must ________ to the safety guidelines provided by the organizers.

Trong không gian với hệ tọa độ Oxyz, cho điểm \(A\left( 3;1;-2 \right)\), đường thẳng \(d:\frac{x-2}{2}=\frac{y+1}{1}=\frac{z-1}{-1}\) và mặt phẳng \(\left( P \right):2x-y+3z-5=0\).

Tính côsin của góc tạo bởi đường thẳng \(d\) và mặt phẳng \(\left( P \right)\).

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

I’m certain that Joe attended the ceremony as he can vividly recount the event.

Thời gian rụng trứng trung bình vào ngày thứ mấy trong chu kỳ kinh nguyệt ở người?

Trình tự nào sau đây thể hiện đúng tiến trình nghiên cứu môn Sinh học?