Enzim đã tổng hợp trong tế bào sống để làm gì?

Điện tích của một electron có giá trị bằng bao nhiêu?

Cho tam giác \(A B C\) có diện tích \(S\). Nếu tăng độ dài mỗi cạnh \(B C\) và \(A C\) lên hai lần đồng thời giữ nguyên độ lớn của góc \(C\) thì diện tích của tam giác mới là

Mọi hành vi vi phạm quyền bất khả xâm phạm về thân thể của mỗi công dân đều sẽ:

Một đội sản xuất cần \(3\) giờ để làm xong sản phẩm loại I và \(2\) giờ để làm xong sản phẩm loại II. Biết thời gian tối đa cho việc sản xuất hai sản phẩm trên là \(18\) giờ. Gọi \(x,\,y\) lần lượt là số sản phẩm loại I, loại II mà đội làm được trong thời gian cho phép.

Read the following passage about powering 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. 

TikTok is a popular social media app where people can create and share short videos [I]. It started in China in 2016 as Douyin [II]. The app is known for its easy-to-use tools that let users add music, effects, and filters to their videos [III]. People of all ages enjoy making and watching TikTok videos, which can be funny, educational, or creative [IV].

One of the reasons TikTok is so popular is because of its algorithm, which shows users videos that match their interests. When you open the app, you see a personalized feed called the "For You" page. This page is different for everyone and updates with new videos all the time. Users can also follow their favorite creators to see more of their content.

TikTok has become a platform for trends and challenges. Many users participate in dance challenges, lip-syncing, and other viral activities. These trends can spread quickly, reaching millions of people in a short time. Because of this, TikTok has influenced music charts, fashion, and even language. Songs that go viral on TikTok often become hits on other platforms too.

The app is also a space for education and advocacy. Many creators use TikTok to share knowledge about various topics, such as science, history, cooking, and fitness. Others use the platform to raise awareness about social issues and promote positive change.

In addition to individual creators, many brands and businesses use TikTok for marketing. They create content to engage with their audience, often using popular trends and challenges to promote their products.

However, TikTok has faced some criticism and challenges. Concerns about privacy and data security have led to scrutiny from governments. Despite these issues, TikTok still remains one of the most downloaded apps in the world.

Which of the following best summarises paragraph 3?

Đâu không phải nhược điểm của phương pháp chiếu xạ:

Đặc trưng của các công ty xuyên quốc gia là

Ánh sáng tác động đến cây trồng thông qua
(1) Cường độ chiếu sáng
(2) Chất lượng ánh sáng
(3) Thời gian chiếu sáng

Để trung hòa 200 ml dung dịch NaOH 1M thì thể tích dung dịch HCl 0,5M cần dùng là

Cho cấp số cộng \(\left( {{u}_{n}} \right)\), biết \({{u}_{1}}=2\), công sai \(d=-1\), tổng \(10\) số hạng đầu tiên của cấp số cộng trên bằng

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.

The word "depletion" in paragraph II is OPPOSITE in meaning to ____.

Vì doanh nghiệp vẫn phải nhập khẩu thêm linh kiện để lắp ráp ô tô nên phải nộp thuế nào?

 Chủ thể trung gian có vai trò như thế nào trong các quan hệ mua – bán, sản xuất – tiêu dùng?

Theo thang Celsius, nhiệt độ của một viên bi sắt vừa được nung nóng là 150 ^oC. Theo thang Kelvin, nhiệt độ này tương đương với bao nhiêu độ K?

My friend, Karen is hoping that she gets enough experience in the sales team, for her next job, she’ll be able to apply for as a sales ________.

Một số hiện tượng như mưa, lũ, chặt phá rừng,... có thể dẫn đến hiện tượng thiếu hụt các nguyên tố dinh dưỡng như Nitrogene (N), Phosphorus (P), Calcium (Ca) cần cho một hệ sinh thái, nhưng nguyên tố carbon (C) hầu như không bao giờ thiếu cho các hoạt động sống của hệ sinh thái. Đó là do:

Choose A, B, C or D to make a complete dialogue for each question.

a. I’m short on time, though; I need to get back to work.

b. I know a great place; it's just around the corner.

c. Can you recommend a good café nearby?

d. If you hurry, I can show you the way.

Nhà Ông Năm là chủ một trang trại có 10000 con gà. Phương thức chăn nuôi của ông Năm đó là?

Theo quy định pháp luật, tình huống nào sau đây được ứng cử đại biểu Quốc hội và đại biểu Hội đồng nhân dân các cấp?

Read the following leaflet 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 7 to 12.

EXPLORE THE POWER OF SOCIAL MEDIA!

Start your social media journey today and discover a world of endless possibilities

Connect, Share, and Learn!

Social media has changed the way we (7)______, learn, and share ideas. It allows us to stay in touch with friends, (8)______ new topics, and share our daily moments with the world. Whether you love posting pictures or watching videos, social media is a space for everyone.

What Makes Social Media Great?

• Stay Connected – (9)______ with family and friends, no matter how far they are.
• Learn Something New – Follow pages about hobbies, news, or (10)______ skills you want to improve.
• Express Yourself – Share your thoughts, photos, and videos with (11)______ users around the world.

Social Media for Everyone!

Social media is (12)______ for fun but it’s also a tool for learning, building friendships, and sharing your voice. Join a community today and see how it can make your life more exciting and connected!