Nguyễn Dữ là con trai của ai?

Cho biết: Nhân tố nào sẽ ảnh hưởng đến tốc độ gia tăng dân số?

Mỗi nephron được cấu tạo từ những bộ phận nào?

Mệnh đề phủ định của "Bất phương trình $x-2<0$ vô nghiệm" là

Bạn H và G đi xe máy điện không đội mũ bảo hiểm và bị công an giao thông phạt tiền 400.000 đồng. Trong trường hợp trên, bạn H và G đã không thực hiện hình thức pháp luật nào dưới đây?

Read the following passage about the Koromi trend 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]. If you’ve done any traveling at all, you’re likely quite aware that customs and etiquette differ from one culture to another: what may be perfectly innocuous in one place may be hideously offensive in another, and vice-versa. [II]. Granted, even if you haven’t traveled at all, you’re probably aware of the fact that certain types of behavior aren’t exactly acceptable in other countries: belching at the table may be a sign of gratitude in some places, but in most areas of North America and Europe, such a display will earn you a fair bit of ire. [III]. Whether you plan on traveling to any of the places listed below or just doing business with a foreign client, it’s important to educate yourself on the standards of politesse and etiquette beforehand-the last thing you want to do is offend someone with any ignorant, boorish behavior. [IV]. Here’s how to be polite in different countries.

When dealing with Japanese clients, be sure to dress fairly conservatively, and make sure that you bow lower than they do upon meeting them. Accept gifts with both hands and open them later, not in front of the giver, and never blow your nose at the dining table. Avoid asking and answering direct questions: it’s better to imply rather than ask, and to answer with vagueness during conversations.

In Kenya, when greeting someone older or of a higher status than yourself, grip their right wrist with your left hand while shaking it; it’s a sign of respect and deference. Do ask questions about their health, family, business etc. before getting to major topics, as skipping these niceties is seen as impolite. If sharing meals, do not begin eating until the eldest male has been served and starts to eat.

Turning down an alcoholic drink is considered terribly offensive in Russia, so it’s a good idea to fortify yourself with some greasy food before heading out for a meal with Russian or Ukrainian clients. Don’t smile at strangers or they’ll think you’re deranged, and when paying for items, place your money on the counter rather than trying to hand it directly to the cashier.

Where in paragraph I does the following sentence best fit?
"Cultural differences in behavior can lead to unintended offense in certain regions."

Một vật dao động tắt dần có các đại lượng giảm liên tục theo thời gian là

Phát biểu nào dưới đây sai?

Tại sao vi khuẩn lại có ích trong công nghệ sinh học và công nghệ gen?

Biểu hiện nào chứng tỏ bộ mặt kinh tế - xã hội của các nước trong nhóm năm nước sáng lập ASEAN có sự biến đổi to lớn sau khi thực hiện chiến lược kinh tế hướng ngoại? 

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:

People should not throw rubbish in the park. People should not cut down the trees in the park.

Tính đến đầu thế kỉ XX, đế quốc nào có nhiều thuộc địa nhất?

Thất bại của phong trào yêu nước cuối thế kỉ XIX ở Việt Nam đã để lại bài học gì? 

Kết quả của một phép đo được viết như thế nào?

Đâu là cơ sở quan trọng để hình thành các tổ chức liên kết khu vực?

Read the following passage about Asia’s culture 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] Chemicals are present everywhere in our environment, some of which occur naturally, while others are the result of human activities. [II]. They are found in the air, water, and soil, and can have both positive and negative impacts on the ecosystem. Some chemicals, like nutrients, help support life by promoting plant growth [III]. However, others, especially synthetic chemicals such as pesticides, fertilizers, and industrial waste, can be harmful to both the environment and human health. [IV]

The widespread use of pesticides and fertilizers in agriculture has been a major cause of chemical pollution. When these chemicals are used improperly or excessively, they can wash into rivers, lakes, and oceans, leading to water pollution. This runoff can also contribute to the depletion of oxygen in water bodies, a process known as eutrophication. Eutrophication harms aquatic life, disrupting ecosystems and causing the death of fish and other organisms that rely on oxygen.

Toxic chemicals such as heavy metals (e.g., mercury and lead) pose additional threats to the environment and human health. These substances can accumulate in the food chain, starting from plants and animals in contaminated areas and eventually reaching humans. Long-term exposure to these chemicals can lead to serious health issues, including neurological disorders, cancer, and other chronic conditions. Many countries have established regulations to limit the use of harmful chemicals, but enforcement remains a challenge.

Efforts to reduce chemical pollution involve a combination of government regulations, technological innovations, and public awareness. Governments worldwide have introduced stricter rules on the use of hazardous chemicals and encouraged the development of eco-friendly alternatives. These regulations aim to limit the harmful impact of chemicals on the environment, encouraging industries to adopt safer practices. Environmental organizations play a vital role in monitoring chemical pollution, raising awareness, and advocating for cleaner technologies. They work closely with policymakers to ensure effective enforcement of environmental laws. While progress has been made, ongoing efforts are needed to address emerging challenges and ensure a safer and healthier environment for future generations.

According to paragraph II, which of the following is NOT a consequence of chemical pollution?

Một âm thoa nhỏ đặt trên miệng của một ống không khí hình trụ AB, chiều dài l của ống khí có thể thay đổi được nhờ dịch chuyển mực nước ở đầu B. Khi âm thoa dao động ta thấy trong ống có một sóng dừng ổn định. Khi chiều dài ống thích hợp ngắn nhất 13cm thì âm thanh nghe to nhất. Biết rằng với ống khí này đầu B là một nút sóng, đầu A là một bụng sóng. Khi dịch chuyển mực nước ở đầu B để chiều dài 65cm thì ta lại thấy âm thanh cũng nghe rất rõ. Tính số nút sóng trong ống.

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. 

a. Linh: Hi, Peter! It’s been ages. You look amazing!

b. Linh: Yes, I just got back from a trip to Europe!

c. Peter: Hi, Linh! Thanks a lot. You look great, too. Have you been traveling?

Phải treo một vật có trọng lượng bằng bao nhiêu vào lò xo có độ cứng \(k = 200N/m\)để nó giãn ra thêm 50cm