Nội dung nào dưới đây là nói đến vai trò của thuế?

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.

What does the word “it” in paragraph 1 refer to?

Một khẩu pháo có khối lượng m₁=130kg được đặt trên một toa xe nằm trên đường ray biết toa xe có khối lượng m₂=20kg khi chưa nạp đạn. Viên đạn được bắn ra theo phương nằm ngang dọc theo đường ray biết viên đạn có khối lượng m₃=1kg. Vận tốc của đạn khi bắn ra khỏi nòng súng thì có vận tốc v₀=400m/s so với súng. Hãy xác định vận tốc của toa xe sau khi bắn trong trường hợp toa xe đang chuyển động với vận tốc v₁=18km/h theo chiều ngược với đạn.

Nguyên tử nguyên tố sodium có 11 electron. Nguyên tử này có

Xác định lỗi SAI trong câu văn sau:

“Phan Bội Châu đã dùng ngòi bút của mình để tố cáo sự dã man của thực dân Pháp nhưng ông đã kêu gọi thực hiện nhiều hoạt động đấu tranh. ”

In what way do parents keep their children _____ (motivate)?

Trong không gian Oxyz, cho đường thẳng \(d:\left\{ \begin{array}{*{35}{l}}   x=2-t  \\   y=1+2t  \\   z=3t  \\\end{array} \right.\) và các điểm \(A(-1;2;3)\); \(B(0;1;2)\). Mặt phẳng \((P)\) chứa đường thẳng \(d\) và song song \(AB\) có phương trình là:

Read the passage carefully

1. Do you find yourself yawning all day at school? You probably need more sleep. However, it is not just how much sleep you get that is important. What you do before bedtime also has a huge effect on how you feel the next day. If you spend time chatting to someone on social media, or reading a book on your e- reader, you are not alone.

2. All devices' screens give out a large amount of blue light, which affects the body's production of the sleep hormone, melatonin, which can change your sleep patterns. So it is not just getting to sleep that becomes hard, but the quality of your sleep also suffers. The result is that you can wake up several times during the night, and have difficulty getting up in the morning.

3. Sleep is food for the brain, so not sleeping well can be a severe problem for anyone, especially for teenagers, because their brains are still developing. When you do not sleep well, it can be difficult to concentrate at school, which makes it harder to learn and get good grades. It can also affect your mood, making you feel sad or anxious. 

4. So, it is clear you should not use your phone before you go to sleep. Why not leave it in another room? Nothing on social media is so important that it cannot wait a few hours! You should rediscover paper books and enjoy feeling tired and sleepy before bedtime rather than wondering why your best friend has not liked your photo! How will you wake up? You do not have to use the alarm on your phone. Go and buy yourself an old-fashioned alarm clock! The negative effects that screen time is having on sleep have been in the news a lot recently, so manufacturers of smartphones and tablets have added a feature to the mobile devices that can help reduce these. Most new phones have a night-time setting that changes the colour of the screen so that it gives out less blue light. If you really cannot avoid going onto social media at bedtime, think about turning on this setting on your phone.

(Adapted from Prepare)

Which of the following can be affected by blue light from digital screens?

Câu nào đúng?

Đại bộ phận lãnh thổ nước Liên bang Nga nằm trong vành đai khí hậu nào?

Cơ cấu vốn đầu tư vào Đông Dương trong cuộc khai thác thuộc địa lần thứ nhất, thành phần kinh tế nào chiếm tỉ trọng lớn nhất?

Read the following passage about The Key to a Fulfilling Life 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 18 to 22.

In today's fast-paced world, the importance of maintaining a healthy lifestyle cannot be overstated. (18)_________. For instance, those who engage in physical activities regularly often experience increased energy levels and improved mental well-being. 

Moreover, research shows that (19)_________. Healthy habits, such as drinking plenty of water and getting enough sleep, contribute significantly to overall wellness. 

(20)_________. It is essential to find activities that you genuinely enjoy, as this will make it easier to stay committed.

For example, many people find that yoga helps them manage stress while improving their flexibility. (21)_________. (22)_________.

In conclusion, making small changes to your daily routine can lead to significant improvements in your health and happiness. Embracing a healthy lifestyle is not just a trend; it’s a lifelong commitment to yourself.

Choose A, B, C or D that has the CLOSEST meaning to the underlined word/phrase in each question.

Smartphones are very versatile, as they can do many things like making phone calls, taking pictures, or listening to music.

Nội dung nào dưới đây là hoạt động tiêu dùng?

Khi có một lực tác dụng vào một vật có trục quay cố định mà không làm cho vật quay là

Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.

Peter: "Hi, David, do you think it's possible for you to have a talk sometime today?"

David: “ _______”

Số orbital trong các phân lớp s, p, d lần lượt bằng

 Năm 1945, nhân dân một số nước Đông Nam Á giành được độc lập trong điều kiện khách quan nào sau đây?