Đề ôn thi Đề thi vào lớp 10 Hà Tĩnh môn Tiếng Anh - Mã đề HTI-172

Have you ever wondered how your phone knows exactly where you are? The answer is the Global Positioning System, or GPS. This amazing system relies on a network of about 30 satellites (24) __________ orbit the Earth. These satellites constantly send out signals. Your phone, or any GPS receiver, listens for these signals. When your receiver (25) __________ signals from at least three or four satellites, it can begin to work.

The receiver then (26) __________ the time it took for each signal to travel from the satellite to your location. This time measurement is then converted into distance. Once the distances from several satellites are known, your precise location (27) __________ by the receiver using a method called trilateration. (28) __________, to get a truly accurate 3D position, including altitude, a signal from a fourth satellite is needed. This is because the fourth signal helps to correct any small timing errors. From navigating in a new city to tracking a delivery, GPS technology now (29) __________ an important part in our modern lives.

In Vietnam, it's hard to imagine a kitchen without a packet of Hảo Hảo or Omachi instant noodles. They are a global phenomenon, but their popularity in Vietnam is among the highest in the world. For students, these noodles are more than just food; they are a cheap, fast, and easy solution for a quick lunch between classes or a late-night study snack. This accessibility has made them a staple in modern Vietnamese life.

The primary appeal of instant noodles is their convenience. In less than five minutes, a student can have a hot meal ready. This is incredibly helpful for those with busy schedules filled with school, homework, and extracurricular activities. Instead of spending time cooking a complex meal, a convenient packet of noodles allows a student to eat quickly and get back to their tasks. This time-saving aspect is what makes them so popular among young people.

However, health experts often raise concerns about the nutritional value of instant noodles. While they can certainly fill your stomach, they offer very few essential nutrients like fiber, vitamins, or minerals. Instead, they are typically high in sodium (salt), unhealthy fats, and preservatives. Relying on them too often can contribute to an unbalanced diet, as eating them provides only a temporary feeling of fullness without delivering the nutrients a growing body needs.

So, should students stop eating instant noodles completely? Not necessarily. The key is moderation and making smart additions. While a packet of noodles alone isn't a balanced meal, it can be a base for one. Adding fresh vegetables, a boiled egg, or some lean meat can significantly boost its nutritional profile. By doing this, students can still enjoy their favorite quick meal occasionally without completely sacrificing their health.