Đề ôn thi Đề thi vào lớp 10 Thái Nguyên môn Tiếng Anh - Mã đề TNG-76

An excavator's arm is a marvel of engineering, capable of powerful and precise movements. It consists of three main sections: the boom (the part closest to the cab), the stick (also called the dipper arm), and the bucket at the very end. (29) __________ of these parts is moved by large hydraulic cylinders. The basic operating (30) __________ behind this amazing strength is Pascal's Law applied to fluid dynamics. An operator in the cab controls the flow of special oil to pistons. This pressurized fluid is what allows the machine to (31) __________ difficult tasks like digging trenches and lifting heavy materials with surprising accuracy.

The force generated is truly immense. If an excavator’s arm were not hydraulic, it (32) __________ have nearly enough strength to lift tons of rock or soil. The hydraulic system multiplies the operator’s force significantly. (33) __________, even small movements of the control levers result in massive power at the bucket. The entire system is connected (34) __________ a network of reinforced hoses designed to withstand incredibly high pressure, making it a perfect example of applied physics on the construction site.

When you see someone in need or hear about a cause you care about, it's natural to want to help. For many teenagers, the question isn't whether to give, but how. This leads to a common debate: is it more effective to give money directly to an individual, or should you support a large, organized charity? Both approaches have their own strengths and weaknesses, and understanding them can help you make a more thoughtful contribution.

Giving directly to a person or family in need offers an immediate sense of impact. When you give cash to a homeless person or buy food for a struggling family, you see the result of your generosity right away. This method feels very personal and ensures that 100% of your donation goes to the recipient without any administrative costs. However, a potential downside is that this type of help might only solve a short-term problem without addressing the root causes of poverty or illness.

On the other hand, contributing to established non-profit organizations allows for a different kind of impact. These groups have the structure and expertise to manage large-scale projects, such as building schools or providing medical care. In Vietnam, for example, the VinaCapital Foundation's 'Heartbeat Vietnam' program is a professional organization that has successfully funded thousands of heart surgeries for children. While a small part of your donation might go to operational costs, these organizations can create long-lasting, systematic change.

Ultimately, there is no single 'best' way to help. The most effective method depends on your personal goals and the specific situation. Do you want to provide quick relief to one person, or contribute to a larger, long-term solution? By thinking critically about this question, you can ensure that your desire to give back truly makes a difference in the way you intend.