Đề ôn thi Đề thi vào lớp 10 Trường THPT Chuyên KHXH môn Tiếng Anh - Mã đề KHXH-07

At first glance, a screw seems incredibly simple. It is a common type of (35) __________ used to fasten materials like wood or metal together. Its main job is to hold objects securely, performing this task with remarkable efficiency. While it looks like just a nail with grooves, its design is based on the inclined plane, a fundamental engineering principle.

Imagine a ramp, or inclined plane, wrapped around a central cylinder. This helical structure is known as a thread, and it is a (36) __________ feature of any screw. The distance between each turn of the thread is called the "pitch." This winding path is key to how the screw functions as a powerful simple machine.

The genius of the screw is how it converts one motion into another. When you turn a screw, you apply rotational force. Thanks to its design, you (37) __________ apply a huge amount of pushing force directly. The screw changes this easy turning into a powerful, straight-line push. (38) __________ allows it to enter hard materials like wood.

The threads create significant friction, helping to hold the screw firmly in place. The finer the threads, (39) __________ the grip it provides. (40) __________ simple design hide such a clever physics principle. This mechanical advantage makes the screw a strong and reliable fastener, much more secure than a nail.

Screws are essential; they (41) __________ a vital role in everything from constructing furniture to assembling electronics. (42) __________, the humble screw is a perfect example of engineering genius, transforming a small rotational effort into a powerful fastening force.

In today’s hyper-connected world, a new type of celebrity has emerged: the ‘teenfluencer’. These are young individuals, often teenagers, who have built massive followings on platforms like TikTok, YouTube, and Instagram. They aren't traditional movie stars or singers; instead, they gain fame by sharing aspects of their daily lives. In Vietnam, a prominent example is Jenny Huynh, who captivated millions of young followers with her vlogs. This phenomenon is no longer a distant trend but a present-day reality, raising important questions about fame, work, and growing up in the digital age.

So, how do these young creators achieve such widespread popularity? The key often lies in relatability. They create content about topics that resonate with their peers, such as school life, fashion, comedy sketches, or personal hobbies. Success is not about having a professional studio or expensive equipment; it is about creating content that feels authentic and genuine. By sharing their true personalities and experiences, teenfluencers build a strong, trust-based connection with their audience, who see them not as distant stars but as friends they can look up to.

The benefits of this early success can be significant. Many teenfluencers earn a substantial income through brand partnerships, advertisements, and merchandise, achieving financial independence at an age when most of their peers are receiving pocket money. Beyond the financial aspect, they develop valuable real-world skills in marketing, video production, negotiation, and public speaking. This hands-on experience in building a personal brand is an education in itself, boosting their confidence and preparing them for future entrepreneurial ventures.

However, this digital stage comes with a dark side. The pressure to constantly create engaging content and maintain a perfect online image can be immense. Unlike traditional jobs, being a teenfluencer means their life is always on display, leading to a significant loss of privacy. They are exposed to negative comments and constant public judgment, which can be damaging to their mental health. Growing up under this intense spotlight means navigating the normal challenges of adolescence while also being a role model to millions, a responsibility that can be overwhelming.

Ultimately, the life of a teenfluencer is a double-edged sword. It offers extraordinary opportunities for creativity, financial success, and personal growth. Yet, it also presents unique and serious challenges related to mental well-being, privacy, and the pressures of modern fame. For today’s teenagers, understanding this balance is crucial, whether they dream of becoming a creator or are simply consumers of the content that fills their social media feeds.