Choose a suitable word or phrase (marked A, B, C or D) to fill in each blank.

'Do you care very much about what other people think?'—'_________________. I obsess about others’ comments about me.'

 

Người ta trồng \(3\,003\) cây theo dạng một hình tam giác như sau: hàng thứ nhất trồng \(1\) cây, hàng thứ hai trồng \(2\) cây, hàng thứ ba trồng \(3\) cây, …, cứ tiếp tục trồng như thế cho đến khi hết số cây. Số hàng cây được trồng là bao nhiêu?

Chọn câu sai.

Chất điểm chuyển động theo một chiều với gia tốc a = 4 m/s² có nghĩa là

Khi nói về quang hợp, nhận định nào sau đây đúng?

Trong xu thế hội nhập quốc tế hiện nay, khi tiếp thu những thành tựu văn hóa nhân loại, đòi hỏi chúng ta phải:

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).

Where in paragraph I does the following sentence best fit?

Young people are particularly affected due to their high engagement with these platforms.

Thành phố thông minh được phát triển dựa trên yếu tố nào sau đây?

Chủ thể nhà nước có vai trò gì khi tham gia vào hoạt động kinh tế?

Biết \(\lim _{x \rightarrow 3} \frac{x^{2}+b x+c}{x-3}=8(b, c \in \mathbb{R})\). Giá trị \(P=b+c\) bằng

Trong không gian Oxyz, cho điểm \(A(1;2;3)\) và hai đường thẳng \({{d}_{1}}:\frac{x}{1}=\frac{y}{1}=\frac{z}{2}\); \({{d}_{2}}:\frac{x-2}{3}=\frac{y}{2}=\frac{z}{1}\). Đường thẳng \(\Delta \) đi qua \(A\), vuông góc với \({{d}_{1}}\) và cắt \({{d}_{2}}\). Biết \(\Delta \) có một vectơ chỉ phương \(\vec{u}=(a;b;-1)\). Tổng \({{a}^{3}}+{{b}^{3}}\) bằng:

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\(P\left( A\cap B \right)\).

Trong không gian \(Oxyz\), cho ba điểm \(A(1;3;4)\), \(B(-1;1;2)\), \(C(3;2;-12)\). Cho \(M\) là điểm thuộc mặt phẳng \(\left( Oxy \right)\) thoả mãn \(A{{M}^{2}}+B{{M}^{2}}+C{{M}^{2}}=174\). Hoành độ của điểm là (…a…), tung độ của điểm \(M\) là (…b…).

Phương án nào dưới đây nói đến vai trò của thuế?

Những động vật nào sau đây sinh trưởng và phát triển qua biến thái không hoàn toàn?

Nguyên nhân của hiện tượng biển tiến, biển thoái là do đâu?

Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.

The explosion in mobile phone use around the world has made some health professionals worrieSome doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health.

On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. Signs of change in the tissues of the brain and head can be detected with modern scanning equipment. In one case, a traveling salesman had to retire at young age because of serious memory loss. He couldn't remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer's doctor didn't agree.

What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.

As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it's wise not to use your mobile phone too often.

Which of the following best paraphrases this sentence: “Phones are more than a means of communication - having a mobile phone shows that they are cool and connected.”?

Theo chiều tăng của điện tích hạt nhân, độ âm điện của các nguyên tố trong cùng một chu kì

Căn cứ vào nguồn gốc, vật nuôi được chia thành ?