Đề ôn thi Đề thi vào lớp 10 Hà Tĩnh môn Tiếng Anh - Mã đề HTI-21

3D printing is an amazing technology that can (24) __________ a digital design to life. It’s a process that transforms a file on a computer into a real, physical item. The journey begins not with the printer, but with a detailed 3D model. A designer (25) __________ this model using special computer-aided design (CAD) software. This software, (26) __________ is incredibly powerful, allows them to design almost anything imaginable, from a simple phone case to a complex medical implant. This digital blueprint is the essential first step.

The completed design is then sent to a 'slicer' program, where the 3D model (27) __________ into hundreds or thousands of thin, horizontal layers. Each layer is like a single, flat slice of the final object. (28) __________, the printer receives these sliced instructions and starts its work. It carefully adds material, such as melted plastic, layer by layer. Each new layer fuses with the one below it, gradually forming the complete and (29) __________ object from the bottom up.

The world's cities are growing, but this growth often leads to pollution and other environmental problems. In response, architects and urban planners are creating 'eco-cities.' These are cities designed to live in harmony with nature. Vietnam is exploring this concept, with developments like Ecopark near Hanoi showing a strong focus on green spaces. These future cities promise a healthier, more balanced way of life for everyone.

What makes a city 'eco'? A key element is energy. Eco-cities often use renewable energy sources, such as solar panels on every roof. Another important aspect is sustainable transport. Instead of private cars, residents are encouraged to use electric buses, extensive bicycle networks, and pedestrian-friendly streets. This approach reduces traffic congestion and air pollution significantly.

Green buildings are also fundamental. These buildings might have 'living roofs' covered in plants, which help cool the building and improve air quality. Furthermore, eco-cities implement efficient waste management systems. This means maximizing recycling and composting, turning waste into a resource instead of a problem. The goal is to create a circular system where very little is thrown away.

Building an eco-city is not just about technology; it's about creating a community that values nature. The result of these efforts is a cleaner environment and a higher quality of life for residents. For young people in Vietnam, imagining such a future is exciting. The choices made today will shape the cities they will live and work in tomorrow.