Một điểm A trên mặt nước dao động với tần số 100 Hz. Trên mặt nước người ta đo được khoảng cách giữa 7 gợn lồi liên tiếp là 3 cm. Khi đó vận tốc truyền sóng trên mặt nước là

Chu trình Crep diễn ra trong bào quan nào?

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence(s) that best complete(s) each of the following exchanges.

Lucky: “________________________”

David: “Oh, about 25 minutes usually.”

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

Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.

I didn’t enjoy the performance because I couldn’t ______ with any of the main characters.

Đâu không phải nguyên nhân hình thành các tổ chức liên kết kinh tế khu vực?

Read the following announcement 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.

Vietnam International Art Exhibition 2025-A Landmark Cultural Event

Taking place from July 25th to 29th at the International Centre for Exhibition in Hanoi, the Vietnam International Art Exhibition 2025 will showcase over 100 famous galleries (1) _______ are derived from global art capitals alongside Vietnam’s (2) _______ art institutions.

Visitors will gain exposure to a wide (3) _______ of oil paintings, sculptures, digital art, and mixed media, blending traditional and contemporary styles. The event will also feature live art demonstrations and insightful discussions (4) _______ by famous artists and curators, offering a deeper understanding of modern artistic trends. 

This exhibition is a unique opportunity for (5) _______, investors, and art enthusiasts to discover emerging talents and (6) _______ some artworks. Don't miss this incredible celebration of artistic expression!

For more information, visit https://vniae.com/.

(Adapted from https://english.vov.vn)

Choose the best answer for number 4:

Read the following passage about technology 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.

Although couples will rarely believe it, scientific factors have a lot to do with falling in love. Research has shown that scent plays an important role in attraction, (18)______. Other experiments have demonstrated that love is caused by combinations of chemicals in the brain . Furthermore, New York psychologist Arthur Aron applied the principles of science to demonstrate that the process of falling in love (19) ______.   

Some scientists claim that we take between ninety seconds and four minutes to decide if we fancy someone. However, the leap from being attracted to someone to falling in love with them is a big one, and Aron wanted to find out if the closeness associated with feelings of being in love could be created artificially.

Aron produced a paper that included 36 questions designed to encourage intimacy if couples answered them together. (20)______.They covered many personal opinions and experiences; for example, 'Would you like to be famous?", 'What does friendship mean to you?" and 'When did you last cry in front of another person?" After answering the questions together, (21)______.  

Aron tested his questions on pairs of strangers and then asked them to stare at each other. All of the participants reported feeling close to their partners. (22)______. So if you're keen on someone and would like to get closer to them, it would seem that Aron's questions could help you achieve your objective.

Thạch quyển được hợp thành bởi lớp vỏ Trái Đất và yếu tố nào?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct option that best fits each of the numbered blanks from 24 to 28. 

Doing chores is good for children. Kids (24) _______ do housework develop important life skills that they will need for the rest of their lives. Doing the laundry, cleaning the house, and taking care of others are among the important skills students will need when they start their own families. These are the things that schools cannot fully teach, (25) _______ it’s important for children to learn them at home. Moreover, sharing housework helps young people learn to take (26) _______. They know that they have to try to finish their tasks even though they do not enjoy doing them. (27) _______ benefit of housework is that it helps develop children’s gratitude to their parents. When doing housework, they learn to appreciate all the hard work their parents do around the house for them. In addition, doing chores together helps (28) _______ family bonds, creating special moments between children and parents. All in all, doing housework can bring a lot of benefits to children.

(Adapted from Global Success)

Giá cả của hàng hóa là thước đo của

Cho hàm số \(y = {\cot ^2}\frac{x}{4}\). Khi đó nghiệm của phương trình y'=0 là

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 thefollowing questions from 13 to 17.

a. David: Hey, Sarah! You’ve been traveling a lot lately, right?

b. David: That's amazing! How was the experience?

c. Sarah: Hi, David! Yes, I just got back from Europe.

Phát biểu nào sau đây không chính xác?

Find the word which has a different sound in the part underlined.

Read the following passage about the Science in Service of Humanity 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.

Science has come out of its shell in laboratories to become a powerful force for human advancement. Modern scientific endeavors increasingly focus on addressing real-world challenges affecting communities globally. From developing vaccines that save millions to creating technologies connecting people across continents, science serves humanity in countless ways. This shift represents a fundamental evolution in how we perceive scientific progress—not merely academic pursuit but a practical tool for improving lives and solving pressing problems.

[I] Medical breakthroughs exemplify how science directly benefits humanity. [II] For instance, gene therapy offers hope for those with inherited conditions, while artificial intelligence helps diagnose diseases earlier and more accurately. [III] These advancements didn't happen overnight; scientists had to burn the midnight oil for years before achieving success. [IV] Their perseverance demonstrates that when science targets humanitarian goals, results can transform society profoundly.

Environmental science has emerged as another crucial domain where laboratory work translates into human welfare. Climate scientists provide data informing policy decisions affecting billions. Conservation biologists develop strategies to protect biodiversity, ensuring future generations benefit from natural resources. Agricultural researchers create drought-resistant crops helping communities withstand changing climate conditions. Despite these contributions, environmental science faces challenges including funding limitations, political resistance, and urgency of addressing accelerating climate change. Nevertheless, dedicated scientists continue their work, recognizing environmental health directly impacts human wellbeing.

The future of science in service of humanity looks increasingly collaborative and inclusive. Modern approaches incorporate diverse perspectives, including indigenous knowledge and community participation. Citizen science projects engage non-professionals in data collection, democratizing the scientific process. Open-access publishing makes research findings available to anyone with internet access, not just wealthy institutions. These developments suggest science's greatest potential lies in becoming more accessible and responsive to human needs. As we face complex global challenges, from pandemics to climate change, science serving humanity offers our best hope for a sustainable future.

Which of the following is NOT mentioned as a way science serves humanity?

Nhiệm vụ lịch sử gì đặt ra đối với các dân tộc Đông Nam Á trước cuộc xâm lược của thực dân phương Tây?

Nội dung nào sau đây là một trong những vai trò của tri thức lịch sử đối với cuộc sống của con người?

Một vật dao động điều hòa với phương trình $x=5\cos\left(4\pi t\right)$ (cm). Số dao động toàn phần vật thực hiện được trong 20 s là

Ý nào sau đây phản ánh đúng cơ hội bên ngoài giúp hình thành ý tưởng trong kinh doanh?