Đề ôn thi Đề thi vào lớp 10 Trường Phổ thông Năng khiếu môn Tiếng Anh - Mã đề PTNK-150

Blinking is an automatic bodily process that we often do without thinking. The eye's surface is constantly (21) __________ to the air, which can contain dust and other small particles. This simple reflex is the body's primary way of protecting one of our most important senses, our sight.

One of the main jobs of blinking is cleaning. Each time we blink, our eyelids sweep across the eye's surface, like tiny windshield wipers. This action protects our eyes from harmful particles and washes them away. This process is essential to remove any irritants that land on the eye and helps to (22) __________ a clear vision.

Blinking is also crucial for keeping our eyes moist. A special fluid, tears, is produced by glands around our eyes. Blinking spreads this tear film evenly across the surface so that the eyes are stopped from drying out. Without this regular moisturizing, our eyes can feel dry and (23) __________.

On average, a person blinks about 15-20 times per minute. However, this rate can decrease when we concentrate on certain activities. Staring at screens for several hours, for instance, can reduce our blink rate by more than half. This can have a negative effect on our eye health, leading to a condition known as digital eye strain.

In conclusion, blinking is much more than just a simple twitch. It is a vital reflex (24) __________ ensures our eyes remain healthy, clean, and well-lubricated. Understanding this process helps us appreciate the small, automatic actions our bodies perform every day to keep us safe and functioning properly.

National parks globally face the challenge of balancing conservation with tourism. These vital sanctuaries preserve diverse ecosystems and endangered species, often housing unique geological formations. However, they perpetually grapple with a fundamental dilemma: how to allow public access while safeguarding their delicate environments. In Vietnam, Cúc Phương National Park, established in 1962, exemplifies this very challenge. As the country's first national park, this sprawling expanse of ancient rainforest is both a scientific treasure and an increasingly popular destination, prompting questions about its core purpose and our role within it. [I]

Cúc Phương is renowned for its exceptional biodiversity, housing thousands of species, many of which are endemic or critically endangered. Its unique limestone karst mountains nurture a complex web of life, from rare plants to fascinating insects and mammals. A celebrated conservation effort within the park is the Endangered Primate Rescue Center, a dedicated facility working tirelessly to rehabilitate and reintroduce rare and threatened primates, such as the Delacour's langur. This center underscores the park's indispensable role as a scientific research hub and a safe haven, truly embodying its identity as a treasure to protect for future generations. [II]

[III] Visitors can explore ancient trees, discover stunning caves, and observe exotic birdlife. The educational value of such visits is undeniable; these trips offer a unique opportunity to connect with nature, learn about environmental conservation, and witness the incredible efforts being made to protect vulnerable species firsthand. For many, a visit to Cúc Phương is an immersive experience, fostering a deeper appreciation for Vietnam’s natural beauty.

However, Cúc Phương's increasing popularity brings significant management challenges. A surge in tourist numbers, if unchecked, can lead to environmental degradation, including habitat disturbance, littering, and noise pollution, directly impacting its delicate ecosystem. The very act of visiting, though educational, can stress the park’s resources and wildlife. Authorities strive for sustainable tourism, implementing designated pathways, strict waste management, and visitor education programs, all aimed at minimizing human footprint while still allowing access to its wonders. [IV]

This brings us to the central question: Is Cúc Phương National Park primarily a treasure to protect, or a place designed for us to visit? In truth, it is both, but the balance is precarious and requires thoughtful engagement from every visitor. As young visitors experiencing these natural wonders, understanding our role is paramount. We are not just spectators; we are temporary custodians. By following park rules, respecting wildlife, and supporting eco-friendly initiatives, we ensure Cúc Phương remains both a vital sanctuary for its incredible biodiversity and an inspiring destination for generations to come.