Số cách xếp 5 học sinh ngồi vào một dãy gồm 5 chiếc ghế sao mỗi ghế có đúng một học sinh ngồi là

Trong thiết kế kĩ thuật, phương tiện nào dùng để chế tạo mẫu, chế tạo mô hình?

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.

Here are some ways to help reduce global warming. Which of these do you regularly do?

Don't use private cars. Your willingness to walk or cycle to nearby places can help reduce the emissions of carbon dioxide and also reduce your own carbon footprint. Use public transport. If travelling long distances, then use public transport rather than your car. However, if you carpool (travel together with a group of people in one car), then you are choosing to help ___(7)___ environment. If we travel with ___(8)___, we will use less petrol.

Make a decision to reduce, recycle, and reuse. Reduce waste by buying reusable products. Don't forget to recycle plastics, glass, and paper products. You may wish to reuse some of your old items to ___(9)___, too. Take unneeded ___(10)___ to a recycling centre.

Buy local goods. When you buy goods ___(11)___ from far-away places, it takes a lot of energy to ___(12)___ them to your area. This means that if you don't buy local food and products, then more emissions of carbon dioxide will happen during the transportation process.

(Adapted from English Discovery)

GTNN của \(F(x;y) = x - 3y\), với điều kiện \(\left\{ \begin{matrix} x\ge 0 \\ 0\le y\le 5 \\ x+y-2\ge 0 \\ 3x-y\le 6 \\ \end{matrix} \right.\)?

Cho hình chóp \(S. A B C D\) có đáy \(A B C D\) là hình chữ nhật, \(A B=2 a, A D=a\). Mặt bên \((S A B)\) là tam giác đều và nằm trong mặt phẳng vuông góc với đáy.

Tính thể tích khối chóp \(S. A B C D\).

Xác định một từ/cụm từ SAI về ngữ pháp/hoặc ngữ nghĩa/logic/phong cách.

Việc tắm sông Seine đã bị cảnh báo từ năm 1923 do nguy cơ sức khỏe và giao thông rộn rịp trên tuyến sông này và vì con sông này cũng là một bể chứa nước thải khi mưa gió.

Read the following passage about the impact of social media on mental health 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] In recent years, social media platforms have become a central part of daily life, offering users countless ways to connect, share, and communicate. [II] While these platforms offer many advantages, experts have noted rising concerns about their effects on mental health, particularly among young people (Smith & Anderson, 2018). [III] Studies reveal that excessive social media use can contribute to feelings of anxiety, depression, and loneliness, despite its intention to promote connection and social interaction (Twenge & Campbell, 2019). [IV]

          A primary reason for these mental health concerns is the tendency for social media users to compare themselves to others. Platforms like Instagram and Facebook often highlight idealized lifestyles, leading users to feel inadequate about their own lives. Additionally, the constant notifications and messages contribute to a "fear of missing out," or FOMO, which keeps individuals in a cycle of checking their phones, often reducing the quality of sleep and overall well-being.

          There is also a growing body of research suggesting a link between social media use and decreased attention spans. When users frequently switch between apps and notifications, their ability to focus for extended periods may diminish (Rosen, 2019). This shift in attention can interfere with productivity, especially in academic and professional settings, where sustained focus is essential.

          Addressing these challenges requires a multi-faceted approach. Some mental health professionals suggest limiting screen time and setting boundaries, such as "device-free" hours before bedtime. Others recommend engaging in offline activities, like reading or exercising, to reduce dependence on social media and build healthier habits. According to psychologists, such strategies can enhance mental resilience and allow for more meaningful, balanced relationships (Robinson & Smith, 2020).

Which of the following best paraphrases the underlined sentence in paragraph 4?

Theo quy định của pháp luật, công dân có thể thực hiện quyền khiếu nại khi nhận được văn bản nào sau đây?

Nhận định nào sau đây không phải là dấu hiệu nhận diện 1 ý tưởng kinh doanh tốt?

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

Năm 1077, quân dân nhà Lý kháng chiến thắng lợi hoàn toàn chống quân xâm lược nào?

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 passage about human life expectancy 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. 

How long will a baby born today live? 100 years? 120 years? Scientists are studying genes that could mean long life for us all.

There are already many, many people who have passed the landmark age of 100. In fact, there are now so many healthy, elderly people that there’s a name for them: the wellderly. These are people over the age of eighty who have no major illnesses, such as high blood pressure, heart disease or diabetes.

There are many scientific studies of communities where healthy old age is typical. These include places like Calabria in southern Italy and the island of Okinawa in Japan. In Calabria, the small village of Molochio has about 2,000 inhabitants. And of these, there are at least eight people over a hundred years old. When researchers ask people like this the secret of their long life, the answer is almost always about food and is almost always the same: ‘I eat a lot of fruit and vegetables.’ ‘I eat a little bit of everything.’ ‘I neither smoke nor drink.’

In the past, scientists looked at things such as diet and lifestyle for an explanation of long life, but these days they are also looking at genetics. Researcher Eric Topol says that there must be genes that explain why people are protected from the effects of aging process. The new research into long life did scrutinize groups of people who have a genetic connection. One interesting group lives in Ecuador. In one area of the country there are a number of people with the same genetic condition. It’s called Laron syndrome. These people don’t grow very tall – just over one metre. But Laron syndrome also give them protection against cancer and diabetes. As a result, they live longer than other people in their families. Meanwhile, on the Hawaiian island of Oahu, there’s another group of long-lived men, Japanese-Americans. They have a similar gene to the Laron syndrome group.

Back in Calabria, researchers constructed the family trees of the 100-year-old people. They looked at family information from the 19th century to today. It is concluded that there are genetic factors that give health benefits to the men. This is a surprising result because generally in Europe, women live longer than men. So what really makes people live longer? It seems likely that it is an interaction of genes, the environment and probably a third factor – luck.

In which paragraph does the writer mention that fortune may be also a factor of their long life?

Phương án nào sau đây nêu đúng giá trị chuyển đổi sang KB của 8GB?

Cho hai biến cố \(A\) và \(B\), với \(P\left( A \right)=0,6\), \(P\left( B \right)=0,7\), \(P\left( A|B \right)=\frac{3}{7}\). Tính\(P\left( A\cap B \right)\).

Tòa án xét xử A tại phiên tòa và ra bản án buộc tội A về “Tội lừa đảo, chiếm đoạt tài sản” thể hiện nhiệm vụ gì của Tòa án nhân dân?

Ai là người đứng đầu Nhà nước và thay mặt nước Cộng hoà xã hội chủ nghĩa Việt Nam về đối nội và đối ngoại?

Tầng lớp tư sản dân tộc ra đời xuất phát từ

Kết thúc quá trình đường phân, tế bào thu được số phân tử ATP là?

Đâu là đô thị cổ đầu tiên của nước ta?