Đề ôn thi Đề thi vào lớp 10 Trường Phổ thông Năng khiếu môn Tiếng Anh - Mã đề PTNK-156

The respiratory system is complex, but one of its most important parts is a muscle that many people don't think about: the diaphragm. The diaphragm is a large, dome-shaped muscle that is located just below the lungs, separating the chest from the abdomen. Because of its position, (21) __________ plays a crucial role in the mechanics of breathing. It works tirelessly every second of our lives, making it essential for survival.

When you breathe in, or inhale, your diaphragm contracts and moves down. This movement increases the space inside your chest cavity. This causes a change in pressure that allows your lungs to expand and (22) __________ air. The expansion of the lungs is a direct result of the diaphragm creating more room for them. It is an active process that requires muscular effort.

The opposite happens when you breathe out, or exhale. The diaphragm relaxes and goes up to its original dome shape. As it moves upward, it pushes the air out of the lungs, reducing the space in the chest. For most people, exhaling is a passive process, meaning it doesn't require as much effort. It's often a more automatic automatic process than inhaling.

What makes the diaphragm fascinating is its dual-control system. Most of the time, its movement is involuntary, controlled by the part of the brain that manages automatic functions like your heartbeat. However, you (23) __________ also consciously control it, which is how you can hold your breath or take a deep breath on purpose. (24) __________ does it work without our thought, but we can also command it when needed.

In summary, the diaphragm is the powerful engine that drives our breathing. Its simple yet effective up-and-down movement, contracting to pull air in and relaxing to push it out, is essential for life. This constant, rhythmic action ensures our body gets the oxygen it needs to function, making the diaphragm a true unsung hero of the human body.

Every click, every comment, and every photo you share online leaves a mark, creating what’s known as your digital footprint. This isn't just a temporary trail; it's a permanent record, an ever-growing collection of data about you. From your social media posts to the websites you visit, everything contributes to this digital identity. It's a concept that might seem abstract, but its implications are very real, especially as you navigate the journey from your school years into higher education and professional life. Understanding this footprint is crucial, because the internet, truly, never forgets. [I]

This digital footprint can be more extensive and enduring than many realize. That funny meme you shared, the strong opinion you voiced in a comment section, or even a casual photo from a party – these all become part of your public record. In today's interconnected world, universities and future employers are increasingly looking beyond traditional resumes. They often delve into candidates' online profiles, seeking insights into their character, judgment, and professionalism. [II]

This trend is particularly evident and growing in Vietnam. Leading tech companies, such as FPT and Viettel, are increasingly incorporating social media profile checks into their hiring processes. They aren’t just looking for technical skills; they are assessing a candidate's overall online presence to understand their communication style, values, and how they represent themselves in a public forum. Knowing that prominent local companies are already doing this highlights the immediate relevance of managing your digital identity for your career prospects right here in Vietnam. [III]

For a 14 or 15-year-old, this understanding is incredibly important. The things you post on platforms like Facebook, TikTok, or Instagram today could potentially be seen by the admissions officer at the university you apply to in just a few years, or by the hiring manager for your first serious job. Posts with inappropriate language, controversial opinions, or images depicting risky behavior, even from years ago, can raise red flags. It’s about recognizing that your online persona is an extension of your real-world reputation, and it can significantly influence how others perceive you. [IV]

Therefore, actively managing your digital footprint is not just a good idea; it’s a vital life skill for future success. This means thinking critically before you post, utilizing privacy settings effectively, and regularly reviewing your online content. Cultivating a positive and thoughtful online presence now will serve as an asset, demonstrating maturity and responsibility to future academic institutions and employers. Your online actions today are an investment in your future, shaping the opportunities that will be available to you tomorrow.