Đề ôn thi Đề thi vào lớp 10 Hà Nội môn Tiếng Anh - Mã đề HN-39

Nurse Sarah was known for her exceptional compassion. Her gentle approach made a significant difference in the stressful hospital environment. (23) __________. (24) __________

Have you ever wondered how a barcode scanner works? It’s not magic; it’s a simple process that happens (25) __________. The scanner first shines a red light onto the barcode. The black bars on the barcode absorb more light than the white spaces, which reflect it back. The scanner has a sensor that measures the reflected light. Because the white spaces reflect more light, they create a stronger signal than the black bars. This makes them the (26) __________ part of the code for the sensor to read.

The sensor uses this pattern of reflected light to create an electrical signal. The scanner's built-in decoder then gets to work, attempting (27) __________ this signal into a usable number. After a successful (28) __________, the number is sent to the computer or cash register. (29) __________ allows the computer to instantly look up the product's information, such as its price and name. The system can then (30) __________ the transaction without the cashier needing to type anything.

Many Vietnamese students feel immense pressure to succeed academically. A common belief is that staying up late to study, especially before an exam, is a necessary sacrifice. This 'all-nighter' culture is widespread among teenagers who think that more hours spent with books will guarantee better grades. However, is this really an effective strategy for learning?

Neuroscience provides a clear answer: sleep is crucial for academic success. During sleep, our brains are surprisingly active, working hard to process the day's information in a process called memory consolidation. This happens during different sleep stages, especially deep sleep and REM (Rapid Eye Movement) sleep. Without enough of these stages, this vital process is interrupted, meaning that much of what you studied might not be properly stored in your long-term memory.

The consequences of sleep deprivation go beyond just feeling tired. When you don't get enough rest, your cognitive abilities suffer. Your ability to concentrate is significantly reduced, your thinking becomes slower, and your problem-solving skills are diminished. This means that even if you spent many hours studying, you might struggle to access that information effectively during an exam. In contrast, a well-rested brain is quicker, more creative, and better at recalling facts.

Ultimately, sacrificing sleep for extra study hours is a counterproductive strategy. Health experts and even government bodies, like those in Ho Chi Minh City who have adjusted school start times, recognize this growing problem. A smarter approach is to plan your study schedule well in advance, review material consistently, and protect your sleep time. This ensures your brain has the time it needs to consolidate your learning and perform at its best.

The rise of standing desks in offices and classrooms is a direct response to concerns about our increasingly sedentary lifestyles. Proponents argue that standing more can improve posture and burn extra calories. (37) __________.

However, the switch isn't always a perfect solution. Improper use of a standing desk can lead to new physical problems, (38) __________. For example, standing rigidly for extended periods without breaks or proper footwear can be just as harmful as sitting all day. (39) __________. The ideal approach involves alternating between sitting and standing, and ensuring your desk and monitor are at the correct ergonomic height, (40) __________.

A. which helps maintain a neutral spine and reduces muscle fatigue

B. Therefore, the key is not just to stand, but to stand correctly

C. This simple change can combat the negative health effects of sitting for long hours

D. placing unexpected strain on the legs, feet, and lower back