Biện pháp thứ ba được giới thiệu để cải tạo đất bạc màu là:

Khi tư hữu xuất hiện đã dẫn tới sự thay đổi trong xã hội như thế nào?

Mọi thiết bị trong hệ thống IoT KHÔNG có đặc điểm nào sau đây?

Nếu một doanh nghiệp sản xuất \(x\) sản phẩm trong một tháng \(\left( x\in {{\mathbb{N}}^{\text{*}}};1\le x\le 4500 \right)\) thì doanh thu nhận được khi bán hết số sản phẩm đó là \(F\left( x \right)=-0,01{{x}^{2}}+400x\) (nghìn đồng), trong khi chi phí sản xuất bình quân cho mỗi sản phẩm là \(G\left( x \right)=\frac{30000}{x}+270\) (nghìn đồng). Giả sử số sản phẩm sản xuất ra luôn được bán hết. Trong một tháng, doanh nghiệp đó cần sản xuất ít nhất bao nhiêu sản phẩm để lợi nhuận thu được lớn hơn 100 triệu đồng?

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.

Nguyên nhân chủ yếu củ cải đường phân bố ở phía bắc Nhật Bản do đâu?

Sai số tuyệt đối của thời gian là:

Việc nhiễm vi khuẩn Helicobacter pylori có thể là nguyên nhân gây ra những bệnh gì dưới đây?

Nhà Ông Sáu ở nông thôn, ông có một đàn gà 20 con, em hãy đề xuất một phương thức chăn nuôi để ông Sáu nuôi gà hiệu quả?

Một nhà máy thép mỗi lần luyện được 12 tấn thép. Biết nhiệt nóng chảy riêng của thép là 2,77.10⁵ J/kg. Nhiệt lượng cần cung cấp để làm nóng chảy thép trong mỗi lần luyện của nhà máy ở nhiệt độ nóng chảy là

Một máy tạo rung được sử dụng để tạo ra sóng trên dây.

Từ hình vẽ ta thấy trên dây có:

Read the passage below and choose A, B, C or D.

Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.

Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection. Noise causes effects that the hearer cannot control and to which the body never becomes  accustomed. Loud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.

Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America's number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.

Based on the passage, how does noise affect psychological and physical health in industrial societies?

Read the passage carefully

1. No matter who we are or where we are from, we only have 24 hours each day to get things done. Some people seem to make the most of their time, using it to achieve their goals and dreams. Others feel that life is passing them by and they aren’t accomplishing anything. If you are in the latter group, it is not too late to turn things around. By implementing a few simple hacks, you can start getting better results very quickly.

2. If you want to become more productive, it pays to learn about the Pareto principle (which is also known as the 80-20 rule). It states that for most tasks, 80 percent of the results we get come from 20 percent of the work we do. For example. 80 percent of the company sales usually come from 20 percent of customers. Therefore, the trick is to focus your efforts on the key 20 percent of actions that truly matter to greatly improve your results.

3. In some cases, people may be busy from morning to night but still seem to get nothing done. In this situation, the problem might be that clear goals haven’t been set. To fix this, set some time aside to list the things you want to achieve in life. Then, select the top three or four that you want to focus on for the next year. Look at your goals every night before bedtime and ask yourself what are the next actions to accomplish each day. Then, promise yourself that you will finish these tasks no matter how busy you get. If possible try completing the tasks first thing in the morning so you are assured of success.

4. Another common mistake regarding productivity is not considering our energy levels. If we try to work around the clock, we will eventually get tired and quit. Everyone needs time to sleep, eat, socialize with friends, and unwind from the stress of the day. To make sure you don’t burn out, be sure to schedule some time for breaks and fun activities into your schedule every day. Finally, no matter how difficult your goals may seem, remember the old saying that “a journey of a thousand miles begins with a single step”.

What is implied in the last sentence of the passage?

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 summarizes paragraph 3?

Nguyên tử nguyên tố X (Z = 12) có cấu hình electron là

Nội dung có tiêu đề "Vận hành" trong tài liệu hướng dẫn đem lại thông tin nào sau đây?

Phát biểu nào không đúng về nguồn lực?

Thang nhiệt độ chúng ta vẫn dùng hằng ngày là thang Celsius, được đặt theo tên của nhà khoa học Thụy Điển Anders Celsius, người đầu tiên xây dựng thang nhiệt độ này vào năm 1742. Trong các phát biểu dưới đây, phát biểu nào là đúng, phát biểu nào là sai khi nói về thang nhiệt độ này?