Đề ôn thi Đề thi vào lớp 10 Trường Phổ thông Năng khiếu môn Tiếng Anh - Mã đề PTNK-162

Biomass is a fascinating form of (21) __________ energy. It is derived from organic matter, which means any material that comes from recently living plants or animals. The basic idea is to use this organic material as a fuel. Unlike fossil fuels, which take millions of years to form, biomass is part of the natural carbon cycle, making it a constantly available energy source.

There are many different materials that can be used for biomass energy. Common examples include wood from forests, specific crops grown for energy production like corn or sugarcane, and even waste from farms or cities. For instance, agricultural residue like straw, or organic garbage from our homes, can be converted into useful energy instead of being thrown away.

The most common way to convert biomass into energy is through direct combustion. In this process, the biomass is burned to produce heat. This heat is often used to boil water, which creates high-pressure steam. This steam can then be used to turn a turbine, which powers a generator to (22) __________ electricity for homes and industries.

Using biomass has several advantages. Because it is part of a quick carbon cycle, it is considered a (23) __________ option than burning fossil fuels, which release ancient carbon into the atmosphere. It also provides a smart way to manage waste. By converting garbage and agricultural leftovers into power, we reduce the amount of material going into landfills. This is a significant environmental benefit.

Hardly ever (24) __________ a single energy source offer so many benefits, from being renewable to helping with waste management. In conclusion, biomass is a vital component of the global effort to switch to more sustainable energy systems, helping to create a healthier planet for future generations.

The world is buzzing about 5G, the fifth generation of wireless technology, promising to revolutionize how we connect. More than just faster internet, 5G boasts ultra-high speeds and incredibly low latency. [I] For you, holding your smartphone, the big question remains: will 5G truly change the way you use your device every single day, or is it just another technical advancement?

Globally, the rollout of 5G networks is already paving the way for innovations that were once just futuristic concepts. [II] Imagine seamless augmented reality (AR) experiences streamed directly to your phone, allowing digital objects to blend with your real-world view without lag. Consider cloud gaming, where complex, high-fidelity games run on remote servers and stream to your device with virtually no noticeable delay, making console-level gaming portable and accessible. These aren't minor tweaks; they represent entirely new paradigms of interaction and entertainment.

This technological leap isn't confined to distant lands; it's rapidly approaching our doorstep. [III] Major Vietnamese mobile carriers like Viettel and Vinaphone are actively investing in and expanding their 5G trial networks. Cities like Hanoi and Ho Chi Minh City are becoming hubs for this development, with infrastructure being laid down for a wider, nationwide launch. This local commitment means the global promises of 5G are becoming a tangible reality for users in Vietnam, making its impact highly relevant to our daily digital lives.

For teenagers, particularly those around 14-15 years old, 5G will directly and significantly impact your daily phone usage. Think about buffering videos or lagging online games. With 5G, those become relics of the past. You'll experience lightning-fast video downloads and incredibly smooth online gaming, giving you a competitive edge. Moreover, 5G will unlock new applications and services not feasible with 4G, opening up possibilities for interactive learning, immersive entertainment, and dynamic social experiences. [IV]

So, while 5G might seem like just another numerical upgrade, its underlying capabilities promise a profound shift in our digital landscape. From enabling next-generation entertainment and innovative applications to fundamentally changing how quickly and smoothly you interact with your device, 5G is poised to redefine the smartphone experience. As these networks expand and become more accessible, prepare for a future where your phone isn't just faster, but also capable of delivering experiences you can barely imagine today. The era of seamless mobile interaction is dawning.