Đề ôn thi Đề thi vào lớp 10 Trường Phổ thông Năng khiếu môn Tiếng Anh - Mã đề PTNK-54

Bluetooth is a wireless technology standard for exchanging data over short distances. It uses short-range radio waves to connect electronic gadgets without the need for cables. From smartphones and laptops to headphones and speakers, Bluetooth allows these items to communicate with each other. For a successful link, two devices (21) __________ first be 'paired' together, which is a process of mutual recognition and authorization.

Pairing is like a digital handshake. During this initial setup, the two devices agree to communicate. This one-time process creates a secure connection by exchanging a secret key. Once a pair is established, the devices can automatically reconnect in the future whenever they are close enough and turned on. The security key ensures that other nearby devices cannot listen to or interfere with the communication.

After pairing, the devices form a small, personal network known as a 'piconet'. This allows up to eight connected devices to communicate with each other at once, with one acting as the central 'master' device and the others as 'slaves'. Once the piconet is active, the devices can begin to (22) __________ data, such as music files from a phone to a speaker, or keystrokes from a keyboard to a computer.

The technology is extremely useful for a wide range of everyday devices. Think about wireless headphones, car audio systems, or computer mice. Using Bluetooth is often more convenient than dealing with tangled wires. (23) __________ does it eliminate the mess of cables, but it also consumes very little battery power, making it ideal for portable electronics that rely on batteries for operation.

(24) __________, Bluetooth has become an essential part of modern connectivity. Its ability to create simple, low-power, and secure wireless networks between our gadgets has fundamentally changed how we interact with technology, making our digital lives more seamless and organized.

Lab-grown leather, an exciting frontier in material science, is revolutionizing fashion and sustainability. [I] Unlike traditional animal leather, this innovative material is cultivated in laboratories using biotechnological processes. Imagine leather grown from mushroom cells, known as mycelium, or specialized yeast. This cutting-edge approach bypasses many conventional steps, offering a glimpse into a future where textiles are engineered with precision, promising a more ethical and sustainable alternative.

The primary appeal of lab-grown leather lies in its potential to mitigate environmental and ethical concerns of traditional leather. Raising livestock for hides contributes to deforestation, significant water usage, and greenhouse gas emissions. Tanning often involves harsh chemicals. Lab-grown alternatives can be engineered to be biodegradable, use fewer resources, and eliminate the need for animal farming. This biotechnological marvel presents a compelling solution for a more responsible fashion industry, moving towards a circular economy.

For young consumers, especially 14-15 year olds, lab-grown leather's implications are significant. Think about your favorite sneakers, jackets, or accessories – many currently use animal leather. This emerging technology means you could soon own high-quality, durable, fashionable items aligning with your values. It’s more than aesthetics; it’s making a conscious choice for fashion that is both cool and kind. As awareness grows about ethical consumption, lab-grown leather offers a tangible way to blend personal style with a better planet.

While Vietnam boasts a significant global presence in traditional leather and footwear, relying on conventional materials, local fashion designers and material innovators are keenly observing global advancements. [II] Though large-scale adoption might take time, Vietnamese companies are exploring how these biotechnological textiles could integrate into their supply chains. [III] This could lead to new export opportunities and a more diversified industry, as the nation seeks to maintain its competitive edge.

The question "Is Lab-Grown Leather the Future of Fashion?" seems increasingly answered with a resounding "yes." This innovative material holds immense promise, offering a path towards fashion that is stylish, high-performing, and genuinely sustainable and animal-friendly. [IV] As scientific research advances and production scales, lab-grown leather could become mainstream, reshaping consumer choices and industry practices. It's a testament to how biotechnology can impact everyday life, proving fashion can evolve without compromising our planet or principles.