Thả một ion dương cho chuyển động không vận tốc đầu từ một điểm bất kì trong một điện trường do hai điện tích điểm dương gây ra. Ion đó sẽ chuyển động

Mark the letter A, B, C or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 13 to 17.

Dear Sir/ Ma’am,

a. If possible, I would like to discuss such matters in person as soon as possible.

b. I have a 12-year-old daughter who has been doing origami for 2 years now, and she hopes to join an origami class taught by origami artists. 

c. I hope to hear back from you regarding the price and exact time of the first lesson.

d. I am writing¬¬¬ this letter to express my interest in your origami workshop.

e. I am reaching out to you to enquire about the cost of each lesson and when the first lesson is starting.

Thank you!

Yours sincerely,

Cheryl Briggs

Xác định một từ/cụm từ SAI về ngữ pháp/hoặc ngữ nghĩa/logic/phong cách.

Thời gian qua, các công ty AI đang quảng bá mạnh mẽ vào nhà trường, kêu gọi họ đầu tư hàng tỉ đô la vào công nghệ mới nhưng sự sụp đổ của AllHere cho thấy rủi ro của việc đầu tư vào trí tuệ nhân tạo, một lĩnh vực nhiều tiềm năng nhưng chưa có thành tích gì cụ thể.

Thông tin là gì?

Output của lệnh: print(1+ 2 + 3+ 4) là gì?

Cho ba số thực dương a, b, c khác 1. Đồ thị các hàm số \(y = {\log _a}x,y = {\log _b}x,y = {\log _c}x\) thể hiện ở hình vẽ:

Khẳng định nào dưới đây là đúng?

Read the following passage about a football player 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.

Cristiano Ronaldo, one of the greatest football players of all time, (18) __________.

Born on February 5, 1985, in Funchal, Madeira, Portugal, he showed exceptional talent from a young age. His journey began at Sporting Lisbon, where he honed his skills before moving to Manchester United in 2003. There, he developed into a formidable player, winning multiple Premier League titles and the coveted UEFA Champions League.

During his time at Manchester United, Ronaldo developed into a world-class player, winning three Premier League titles and the UEFA Champions League. He became well known for his incredible speed and powerful shots  (19) __________ . In 2009, he transferred to Real Madrid, where he broke numerous records, including becoming the club’s all-time leading scorer. (20) __________.

Possessing remarkable athleticism and a keen sense of strategy, (21) __________. His training regimen, which includes intense workouts and a strict diet, ensures that he remains at peak performance. This dedication has allowed him to adapt his playing style over the years, maintaining his relevance in an ever-evolving sport. Additionally, Ronaldo’s ability to lead his teammates has earned him respect both on and off the field.

Beyond his football career, Ronaldo is a philanthropist who uses his platform to give back to the community. (22) __________. His influence extends far beyond the pitch, making him a global icon and a role model for aspiring athletes. Ultimately, Cristiano Ronaldo’s legacy is defined not only by his records but also by his commitment to making a positive impact in the world.

Choose the word or phrase among A, B, C or D that best fits the blank space following passage So you’re between the ages of thirteen and eighteen. What (36) _______ you happy? There have been lots of surveys about teenagers and happiness and they all come to different conclusions. Some surveys say that most young people are happiest (37) _________ they spend time with their family. Others say it’s when they’re (38) ________ friends. Some teenagers think that getting good marks at school and (39) _________ exams makes them happy and others feel that it’s having a boyfriend or girlfriend that improves their lives. The problem is that there isn’t just one thing that makes everyone happy. (40) __________ is something different for each of us, and what made us happy last week might not make us happy next week!

(37) _______

Khi mức độ lạm phát vừa phải sẽ có tác dụng như thế nào?

Đạo hàm của hàm số y = cos⁶x  + sin⁴x. cos²x + sin²x. cos⁴x + sin⁴x – sin²x bằng biểu thức nào sau đây?

Có bao nhiêu cấp số cộng có các số hạng là số tự nhiên, số hạng đầu là số chẵn, tổng các số hạng có giá trị lẻ bằng 33 và tổng các số hạng có giá trị chẵn bằng 44 (nhập đáp án vào ô trống)?

Read the following passage about the Pathways from Today's Actions to Tomorrow's World 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.

As we stand at the crossroads of environmental decision-making, the actions we take today will shape our world in 2050. Scientists warn that we're skating on thin ice with current consumption patterns and carbon emissions. Global temperatures could rise by 2-4 degrees Celsius unless significant changes occur within the next decade. Many countries have pledged to achieve carbon neutrality by 2050, but these promises require immediate implementation. Individual choices in transportation, energy usage, and consumption can collectively influence whether future generations inherit a sustainable planet or face severe climate consequences.

[I] Technological innovation represents our greatest hope for addressing environmental challenges by 2050. [II] Renewable energy sources like solar and wind are becoming increasingly affordable, potentially replacing fossil fuels entirely within thirty years. [III] Electric vehicles may dominate transportation networks, while vertical farming could transform food production in urban areas. [IV] However, these technological solutions must be developed and deployed equitably to avoid creating new disparities between wealthy and developing nations.

Social structures will undergo dramatic transformation by 2050 as demographic shifts reshape communities worldwide. Aging populations in developed countries will necessitate new approaches to healthcare, retirement, and social support systems. Meanwhile, climate migration may force millions to relocate from vulnerable coastal and drought-prone regions. Education systems must evolve to prepare our students for jobs that don't yet exist, emphasizing their adaptability and lifelong learning. Cities will need to become more resilient, incorporating green spaces and sustainable infrastructure to support growing populations.

Economic models must fundamentally change by 2050 to balance prosperity with environmental responsibility. The traditional focus on continuous growth may shift toward measuring success through wellbeing indicators rather than GDP alone. Circular economy principles will likely replace linear production models, with products designed for reuse and recycling. Resource-sharing platforms may become more prevalent, reducing individual consumption while maintaining living standards. Companies implementing genuinely sustainable practices will thrive, while those clinging to environmentally harmful methods may disappear entirely. The transition presents both challenges and opportunities for businesses willing to embrace innovation and sustainability.

Which of the following is NOT mentioned as a potential change by 2050?

Tìm số hạng chứa \(x^{31}\) trong khai triển \(\left(x+\frac{1}{x^{2}}\right)^{40}\).

Trong tự nhiên, copper có hai đồng vị bền là ⁶³Cu và ⁶⁵Cu. Nguyên tử khối trung bình của copper là 63,54. Điền các thông tin còn trống để hoàn thành các phát biểu sau:

- Phần trăm số nguyên tử của ⁶³Cu là %.

- Phần trăm số nguyên tử của ⁶⁵Cu là %.

- Số mol của nguyên tố copper có trong 6,354 gam copper là mol.

- Số mol của đồng vị ⁶³Cu có trong 6,354 gam copper là mol.

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 summarizes the passage?

Cho tập hợp $A = \{x \in \mathbb{R} \, \big| \, (x^2 –1)( x^2 + 2) = 0\}$. Các phần tử của tập $A$ là

Theo Đacuyn, phân li tính trạng của vật nuôi, cây trồng là hiện tượng như thế nào?

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. 

HASTAG ACTIVISM - WORTH CLICKING ON?

Platforms like Facebook and Twitter are being used more and more to ___(1)___ awareness of social issues and ___(2)___ for good causes. There have been several examples of ___(3)___ campaigns in recent years. For instance, the #IceBucketChallenge proved a viral success in raising awareness and funds ___(4)___ ALS, a disease that ___(5)___. Not only did people all over the world post videos of themselves tipping a bucket of iced water over their heads, ___(6)___ they also nominated other people to do the challenge, as well as donating to the Association.

(Adapted from Friends Global)

Dựa trên cơ sở nào sau đây để phân chia các quốc gia trên thế giới thành nhóm nước phát triển và đang phát triển?

Những việc thần Prô-mê-tê đã làm giúp người đọc hình dung như thế nào về nhân vật này?

Mark the letter A,B,C or D on your answer sheet to indicate the sentences that best complete the exchange in the following questions:

Tim and Linda are talking about what to do after school.

Tim: “ _________” 

- Linda: “Yes, I’d love to.”