Đề ôn thi Đề thi vào lớp 10 Trường Phổ thông Năng khiếu môn Tiếng Anh - Mã đề PTNK-123

The aluminum can is one of the most common everyday objects, yet its creation is a marvel of high-speed engineering. Every day, (21) __________ of these lightweight and recyclable containers are produced worldwide. The entire journey from a flat piece of metal to a finished can that is ready to be filled happens in a fraction of a second, showcasing a highly efficient and precise manufacturing system.

The process begins with a huge roll of thin aluminum (22) __________, which can be several kilometers long. In the first stage, a powerful machine called a cupping press punches out thousands of flat, circular discs from this material. These discs, which are then ready for the next stage, are the basic foundation of every can that will be formed.

Next, the discs undergo a process called 'drawing and ironing'. The flat discs are pushed (23) __________ a series of rings by a punch, which draws them up to form a shallow cup. Immediately after, this cup is forced through smaller rings that stretch the metal, making the can taller and its walls thinner. This makes the can walls extremely thin but also surprisingly strong.

After being formed, the cans must be finished. They are washed to remove any oils from the manufacturing stage. Then, they are decorated. The colorful labels and brand logos (24) __________ directly onto the can’s surface using a high-speed printing method that applies multiple colors at once. Furthermore, a protective varnish is applied to the outside to prevent scratches and an internal coating is sprayed to protect the beverage from the metal.

In the final steps, the top of the can is shaped to form the neck, and the can is tested for leaks. This incredible process of manufacturing ensures that millions of cans can be made quickly and consistently, ready to be filled with our favorite drinks. The precision at every step is essential for producing a container that is both durable and convenient.

Instant noodles are a global staple, famed for their incredible convenience and affordability. From busy professionals to students burning the midnight oil, these quick meals offer an instant solution to hunger. In Vietnam, their presence is especially profound, with brands like Hảo Hảo and Omachi being household names. It's common to find them in almost every kitchen, readily available for a swift snack after school or during an intense study session, making them an undeniable part of many young people's daily lives.

Despite their widespread appeal, the nutritional profile of instant noodles often raises concerns. Primarily made from refined flour, palm oil, and a multitude of artificial flavors and preservatives, they are typically high in sodium and unhealthy saturated fats. Essential nutrients like protein, fiber, vitamins, and minerals are notably absent. This imbalance means while they might fill you up temporarily, they offer minimal genuine nourishment for a growing body, leaving vital physiological processes unaddressed.

Regular consumption of such an imbalanced diet can lead to several health issues, particularly for developing teenagers. The excessive sodium content contributes to high blood pressure, a condition usually associated with older adults but increasingly seen in younger populations. Furthermore, a lack of fiber and essential nutrients can result in digestive problems, fatigue, and even impact cognitive function, making it harder to concentrate in class or during exams. [I] Relying solely on instant noodles can truly undermine your overall well-being.

Does this mean you should abandon instant noodles entirely? [II] If you must reach for a packet, consider ways to boost its nutritional value. Adding fresh vegetables like leafy greens, carrots, or mushrooms can introduce much-needed vitamins and fiber. Incorporating a source of protein, such as a boiled egg, tofu, or a few slices of cooked chicken, will help you feel fuller and provide essential building blocks for your body.

Ultimately, instant noodles serve as a prime example of how convenience can sometimes overshadow nutritional needs. For 14-15 year olds navigating demanding school schedules and growth spurts, making informed food choices is crucial. [III] While a packet of Hảo Hảo might be a tempting, quick fix, understanding its impact allows you to balance speed with health. Prioritizing varied, nutrient-rich meals will provide the sustained energy and focus you need to excel both academically and personally. [IV]