Khi một sóng biển truyền đi, người ta quan sát thấy khoảng cách giữa hai đỉnh sóng liên tiếp bằng 8,5 m. Biết một điểm trên mặt sóng thực hiện một dao động toàn phần sau thời gian bằng 3,0 s. Tốc độ truyền của sóng biển có giá trị gần bằng

Dãy nào sau đây gồm các đồng vị của cùng một nguyên tố hoá học?

Một vật được ném ngang từ độ cao h, trong quá trình vật chuyển động thì

Những thành tựu nào của dược học được áp dụng trong đời sống con người?

²⁴Na là chất phóng xạ \({{\beta }^{-}}\), để xác định lượng máu trong bệnh nhân, người ta tiêm vào máu một người một lượng nhỏ dung dịch chứa đồng vị phóng xạ ²⁴Na (chu kì bán rã 15 giờ) có độ phóng xạ 2 μCi. Sau 7,5 giờ người ta lấy ra 1 cm³ máu người đó thì thấy có độ phóng xạ 502 phân rã/phút.

Thức ăn cho bò sữa có nhóm nào sau đây?

Read the following passage about Generations Z and Alpha: Born Multicultural Citizens 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.

Generation Z, born between 1997 and 2012, has grown up in a world (18)_________. These young people use smartphones and computers every day to talk with friends from different parts of the world. If they had been born 30 years earlier, they would not have had these opportunities to experience global connections. They are learning about different cultures, languages, and traditions not just from books but through real online friendships.

Generation Alpha, which includes children born after 2013, is even more connected. The toys that Generation Alpha plays with often teach them about global issues while they have fun. Many schools (19)_________. These young students, who come from diverse backgrounds, are creating a new kind of society where differences are celebrated.

(20)_________. Generation Z students participate in exchange programs and travel more than previous generations did. (21)_________, sharing their daily lives and learning from each other.

The world that these generations are creating will be more inclusive and understanding. Traditional borders are becoming less important while cultural exchange is valued more highly. Generation Z and Alpha children, (22)_________, will likely become adults who solve problems together across cultural lines. The future looks promising with these multicultural citizens leading the way.

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 23 to 30.

          Happiness is a universal goal, yet its ingredients differ across societies and cultures. For some, safety and security are paramount, as demonstrated by Singapore. Known for its strict laws and highly regulated environment, Singapore provides a clean, orderly, and safe place for its citizens. The government ensures access to basic necessities such as housing and healthcare, significantly reducing poverty and promoting equality. While personal freedoms may be limited, many Singaporeans find satisfaction in the stability and quality of life their country offers, showing that happiness can stem from collective security.

        In contrast, Mexico highlights the importance of social connections in achieving happiness. Despite challenges like poverty and limited access to essential resources, Mexicans often prioritize relationships with family, friends, and neighbors. Simple acts like sharing meals or gathering in the community foster a sense of belonging and emotional well-being. Psychologists have long noted that feeling part of a larger social group can be a powerful source of happiness, even when material wealth is scarce. For them, the joy derived from relationships often outweighs material concerns.

       The role of money in happiness, however, is often debated. In Mexico, many individuals live in similar financial conditions, reducing the pressure of economic competition. When neighbors lack expensive possessions, individuals are less likely to feel dissatisfied with their own circumstances. This suggests that relative wealth and equality may have a stronger influence on happiness than absolute income.

       Ultimately, there is no universal recipe for happiness. Factors like security, freedom, social bonds, and financial equality all play a role, but their importance varies depending on individual and cultural values. Happiness, therefore, remains a deeply personal and multifaceted pursuit, shaped by our unique perspectives and circumstances.                                                                   

According to the passage, which of the following is NOT a factor contributing to happiness in Singapore?

Một vật được thả từ độ cao 3 m xuống đất. Bỏ qua sức cản không khí. Lấy g = 9,8 m/s². Thời gian để vật chạm đất và vận tốc lúc chạm đất lần lượt là

Có bao nhiêu nhận định đúng khi nói về quá trình trao đổi chất ở sinh vật?

(1) Chuyển hóa các chất ở tế bào được thực hiện qua quá trình tổng hợp và phân giải các chất.

(2) Chuyển hóa các chất luôn đi kèm với giải phóng năng lượng.

(3) Trao đổi chất ở sinh vật gồm quá trình trao đổi chất giữa cơ thể với môi trường và chuyển hóa các chất diễn ra trong tế bào.

(4) Tập hợp tất cả các phản ứng diễn ra trong và ngoài cơ thể được gọi là quá trình trao đổi chất.

Năm 1897, thực dân Pháp cử nhân vật nào sang làm Toàn quyền Đông Dương?

Read the following passage about Huawei company 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 23 to 30.

Huawei is a multinational company that makes  telecommunications  parts for  mobile phones , network equipment  and other high-tech  devices . It is the second largest such company in the world. Huawei has its headquarters  in Shenzhen, which became China’s first special economic zone  in 1979.

The Chinese technology company, which was founded  about 20 years ago, has over 100,000 workers in all parts of the world, more than Microsoft.  Most of the company is owned by its  employees .  Huawei started out in the rural  areas in China. In those days most of the telecom contracts  went to  state-owned  Chinese or  foreign  firms. As the company grew, it took hold of urban markets in big Chinese cities and in 1997 it  expanded to other countries.

Today, Huawei is the second biggest manufacturer of telecom equipment, after Ericsson. In 2011,  annual  sales  is expected to be about $12 billion dollars and  likely to get three times as high within the next ten years. Working for Huawei is something many young Chinese engineers and IT workers dream of. The 1.5 square km site  has modern apartments that can be rented, its own hospital, restaurants and bars where employees  can go to in their free time. For Chinese standards workers are well-paid. Although   Huawei has been concentrating  on making telecom parts and whole networks, the company is also looking into other industries in an  attempt to diversify and grow. At Shenzhen  engineers  are experimenting on new forms of video conferencing, a branch  that is expanding rapidly . The Chinese hi-tech giant  is also starting to produce cloud-based  hardware and computers that work  out of the box . 

Even though Huawei is one of the world leaders in producing mobile phone parts it is also pushing into the consumer market with its own  brand  of computers, tablets and smartphones. So far Huawei has failed  to reach  the American market because of security  reasons. The American  government  thinks it has connections  with the Chinese  military and is afraid it will spy  on the American  public 

The word “expanded” in paragraph 2 is OPPOSITE in meaning to ________.  

Chức năng chính của hệ điều hành trên máy tính cá nhân là gì?

Chủ nghĩa tư bản hiện đại là thuật ngữ dùng để chỉ một giai đoạn phát triển của chủ nghĩa tư bản từ