Sai số tương đối của phép đo đại lượng $G=\frac{x}{y}{z}^2$ được xác định bằng công thức nào sau đây?

Hiệu suất của một máy tăng lên khi

Nguyên nhân gây bệnh cho người và động vật là do đâu?

Phát biểu nào sau đây là SAI đúng khi nói về quan hệ giữa thông tin và dữ liệu?

Những đại diện nào sử dụng hình thức dinh dưỡng hóa tự dưỡng?

1) Vi khuẩn nitrate hóa                                            2) Nấm men

3) Vi khuẩn lam                                                       4) Trùng roi

5) Vi khuẩn oxy hóa hydrogen

Chuyển động của vật nào dưới đây có thể coi là chuyển động rơi tự do?

Để tối đa hóa nguồn lợi nhuận, trong cuộc khai thác thuộc địa lần thứ nhất ở Việt Nam, thực dân Pháp vẫn duy trì phương thức bóc lột nào?

Trong tứ diện \(OABC\) có \(OA,OB,OC\) đôi một vuông góc với nhau và \(OA = OB =2OC\). Gọi \(G\) là trọng tâm tam giác \(ABC\). Góc giữa \(OG\) và \(AB\) bằng:

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 from 31 to 40.

[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 enhance mental resilience and allow for more meaningful, balanced relationships (Robinson & Smith, 2020).

Which of the following best paraphrases the underlined sentence in paragraph 4?

Phan Bội Châu thực hiện chủ trương giải phóng dân tộc bằng con đường nào?

Nếu không được điều trị kịp thời, lợn mắc bệnh phân trắng lợn con sẽ chết sau bao nhiêu ngày?

Lòng yêu nước được bắt nguồn từ đâu?

Testosterone được sinh sản ra ở đâu?

Read the following advertisement 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 1 to 6.

WELCOME AND ORIENTATION AT LANGLEY COLLEGE

Welcome to Langley College! Classes start next Monday, but you ___(1)___ visit the college from now.

We have a modern sports centre ___(2)___ for £79/year or £6.70/visit. Our café ___(3)___ from 8 AM to 9 PM on weekdays, ___(4)___ convenient for you to relax before or after classes.

Meet your teachers from 8 AM to 12 AM tomorrow ___(5)___ course information.

Remember to bring a photo for your student ID card on Monday. ID cards will be ready for ___(6)___ next Friday.

Contact Mrs. Myatt, the receptionist, at 990-365-4127.

Enjoy your time at Langley College!

Tìm số nguyên \(m\) nhỏ nhất để dãy số \(\left( {{u}_{n}} \right)\) với \({{u}_{n}}=\frac{mn+1}{n+1}\) là dãy số tăng.

Một nguyên tử có cấu hình 1s²2s²2p³. Chọn phát biểu sai:

Nguyên tử của nguyên tố magnesium (Mg) có 12 proton và 12 neutron. Nguyên tử khối của Mg là

Một kiện hàng khối lượng 15 kg được kéo cho chuyển động thẳng đều lên cao 10 m trong khoảng thời gian 1 phút 40 giây. Lấy g = 10 m/s². Công suất của lực kéo là?

Giá trị của biểu thức Python sau sẽ bằng?

4 + 15 / 5

Cho biết những phát biểu dưới đây là đúng hay sai.

Read the following passage about urban shift and mark the letter A, B, C, D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.

[I] Sperm whales are fascinating creatures. [II] They possess the biggest brain of any species, six times larger than a human’s, which scientists believe may have evolved to support intelligent, rational behavior. [III] They’re also highly social and capable of making decisions as a group. [IV] But there’s also a lot we don’t know about them, including what they may be saying to one another when communicating with a system of short clicks, known as codas.

Now, new research published in Nature Communications today suggests that sperm whales’ communication is actually much more expressive and complicated than was previously thought. A team of researchers led by Pratyusha Sharma at MIT’s Computer Science and Artificial Intelligence Lab (CSAIL) working with Project CETI, a nonprofit focused on using AI to understand whales, used statistical models to analyze whale codas and managed to identify a structure to their language that’s similar to features of human language. Their findings represent a tool future researchers could use to decipher not just the structure but the actual meaning of whale sounds.

For the study, the researchers examined recordings of 8,719 codas from around 60 whales collected by the Dominica Sperm Whale Project between 2005 and 2018, using a mix of AI algorithms for pattern recognition and classification. The AI then turned the clicks within the coda data into a new kind of data visualization called an exchange plot, revealing that some codas featured extra clicks. These extra clicks, combined with variations in the duration of their calls, appeared in interactions between multiple whales, which they say suggests that codas can carry more information and possess a more complicated internal structure than we had previously believed.

The team’s next step is to build language models of whale calls and to examine how those calls relate to different behaviors. They also plan to work on a more universal system that could be used across species, says Sharma. Taking a communication system we know nothing about, working out how it encodes and transmits information, and slowly beginning to understand what’s being communicated could have many purposes beyond whales. “I think we’re just starting to understand some of these things,” she says. “We’re very much at the beginning, but we are slowly making our way through.”

Which of the following is TRUE about the study discussed in this passage?