Trong các phương pháp sản xuất điện năng, phương pháp cần có bộ chuyển đổi dòng điện một chiều (DC) thành dòng điện xoay chiều (AC) là

Cho hàm số $f\left(x\right)$ có bảng biến thiên như sau:

Hàm số đã cho nghịch biến trong khoảng nào dưới đây?

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.

The word their in paragraph 2 refers to ______.

Phương án nào dưới đây không thuộc vai trò của thuế?

Cho hàm số bậc hai \(y = {x^2} + x - 1\). Trục đối xứng của đồ thị hàm số là: 

Một loại mạng hoạt động trong phạm vi nhỏ giữa các máy tính là

Complete each of the following sentences using the cues given. Write full sentence.

(You can change the cues and use other words in addition to the cues to complete the sentences.)

She / participate / judge / famous / TV / programs / such / Vietnam Idol / The Voice of Vietnam / few years / ago.

Tích của giá trị nhỏ nhất và giá trị lớn nhất của hàm số $y = f\left( x \right)=x+\dfrac{4}{x}$ trên đoạn $\left[ 1;3 \right]$ bằng

Điện áp tức thời giữa hai đầu đoạn mạch xoay chiều là \(u=120\sqrt{2}\text{cos}50\pi t\) (V). 

Tần số dao động của điện áp này là Y Hz. Tìm Y

Quan sát hình ảnh, cho biết đây là công nghệ nào?

a. Artificial intelligence (AI) is transforming various industries, from healthcare to finance, by automating processes and improving efficiency in ways previously unimaginable.

b. AI technologies are now being used to diagnose diseases accurately, manage complex datasets, and even make predictive analyses in fields like epidemiology and economics.

c. Furthermore, advanced AI systems help automate repetitive tasks, which can save time, reduce costs, and allow human employees to focus on more creative and strategic work.

d. As the field of AI continues to advance, the role it plays in our lives will undoubtedly grow, impacting both personal and professional domains.

e. As a result, the demand for skilled AI professionals who can develop, maintain, and regulate these technologies is on the rise across industries.

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.

STAY SAFE ON FACEBOOK

Let’s protect your privacy & security

1.    Privacy risks: Facebook collects a large (7) ______ of personal information. This information is often used for targeted advertising but could also be accessed by unauthorized third parties. Always be (8) ______ of what you share like your phone number, address, or financial information.

What you can do:

●        Adjust your privacy (9) ______ to limit who can see your posts and personal details.

●        Think twice before sharing information that could be misused.

2.    Security tips: Your Facebook account can be a target for hackers. Cybercriminals may attempt to steal your login information or infect your device with malware.

What you can do:

●        Enable two-factor authentication (2FA): This adds an extra layer of security, making it harder for (10) ______ to access your account.

●        Use strong, unique passwords: (11) ______ using the same password across multiple sites, make your Facebook password complex.

●        Beware of scams: Don’t click on suspicious links or download files from unknown sources. Always (12) ______ the sender’s identity before responding to messages.

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.

Discover the Future of Dining at Viet Organic Garden Restaurant!

At Viet Organic Garden Restaurant, we offer a (7)______of fresh, organic dishes designed to meet the growing demands of modern consumers. As the world experiences a (8)_______toward healthier, eco-friendly lifestyles, we are proud to provide a dining experience that prioritizes sustainability and wellness.

Unlike the other restaurants that depend on processed foods, we source our ingredients directly from local farmers. This ensures that our supply is never (9)______and allows us to deliver meals rich in flavor and nutrition. (10)______ ethical sourcing and environmentally friendly practices, we bring quality and care to every plate.

When you place your (11)______at Viet Organic Garden Restaurant, you can trust that each dish is made with love and care. Join us and be part of this exciting movement. Whether you're looking for a cozy weekend meal or a refreshing take on dining, Viet Organic Garden Restaurant stands apart from the (12)______ options in the market as a leader in sustainable and healthy dining.

Một khối khí lí tưởng xác định thực hiện quá trình biến đổi trạng thái được biểu diễn như Hình vẽ.

Hình nào sau đây biểu diễn đúng quá trình biến đổi trên?

Khuếch đại thuật toán thực hiện dựa vào sự chênh lệch điện áp giữa

 Hoạt động phân chia các yếu tố sản xuất và phân chia sản phẩm cho các cá nhân tiêu dùng được gọi là gì?

Lông hút ở rễ do tế bào nào sau đây phát triển thành?