Đề ôn thi Đề thi vào lớp 10 Trường THPT Chuyên KHTN môn Tiếng Anh - Mã đề KHTN-145

In professional communication, every detail matters, especially in written correspondence. A seemingly minor oversight, like a typo, can significantly impact how you are perceived by colleagues and clients. (23) __________. (24) __________

Have you ever wondered how a microwave oven heats your food so quickly? The magic is all thanks to a special type of energy. Inside every microwave, there is a device called a magnetron (25) __________ generates microwaves. These are a type of electromagnetic wave, similar to radio waves. When you press 'start', these microwaves (26) __________ into the food compartment through a guide. The microwaves don't heat the container; instead, they target the water molecules inside the food.

Water molecules have a positive and a negative end. (27) __________, when the microwaves pass through, they cause these molecules to spin around rapidly and (28) __________ friction. This friction produces heat, which then cooks the food from the inside out. This process is incredibly efficient. For instance, a potato that (29) __________ an hour to bake in a regular oven needs only about 10 minutes in the microwave. This technology has certainly (30) __________ a significant impact on modern kitchens.

Your teacher assigns a presentation on Vietnamese history. You need a powerful image of the Temple of Literature. A quick Google search gives you hundreds of options. You pick the best-looking one, save it, and add it to your slide. This process is fast and easy, but many students don't realize it can lead to a serious problem: accidentally using someone's work without their consent.

Every image, song, or text created by someone is automatically protected by copyright. This is a legal right that gives the creator exclusive control over how their work is used. Using a copyrighted photo in your project without the creator's permission is a form of copyright violation. It is important for students to understand this principle to show respect for the artists and photographers whose work they admire.

So, how can you find images you can legally use? The answer lies in two main categories: Public Domain and Creative Commons (CC). Public Domain images have no copyright and can be used by anyone for any purpose. Creative Commons is more flexible; creators allow others to use their work for free, but often with some restricted conditions, such as giving credit to the original artist or not using the photo for commercial purposes.

Using legally sourced images is a vital digital literacy skill. It not only keeps you safe from copyright issues but also improves the quality and professionalism of your school projects. Websites like Unsplash, Pexels, and Pixabay are excellent resources filled with high-quality, royalty-free photos. Taking a minute to find a 'safe' image shows that you are a responsible digital citizen who values creativity.

The rise of standing desks in offices and classrooms is a direct response to concerns about our increasingly sedentary lifestyles. Proponents argue that standing more can improve posture and burn extra calories. (37) __________.

However, the switch isn't always a perfect solution. Improper use of a standing desk can lead to new physical problems, (38) __________. For example, standing rigidly for extended periods without breaks or proper footwear can be just as harmful as sitting all day. (39) __________. The ideal approach involves alternating between sitting and standing, and ensuring your desk and monitor are at the correct ergonomic height, (40) __________.

A. which helps maintain a neutral spine and reduces muscle fatigue

B. Therefore, the key is not just to stand, but to stand correctly

C. This simple change can combat the negative health effects of sitting for long hours

D. placing unexpected strain on the legs, feet, and lower back