Why should bulletproof vests be light?
Giải bởi Vietjack
Đáp án C
Giải thích: Vì sao áo chống đạn cần phải nhẹ?
A. Vì hầu hết đạn không mạnh đến vậy
B. Nhà sản xuất cần cắt giảm chi phí
C. Người mặc cần di chuyển dễ dàng
D. Trời sẽ quá nóng nếu như áo nặng.
Thông tin này nằm ở câu cuối cùng của đoạn 2: "In order to get tougher, these vests have got lighter, so officers and soldiers can move more freely while working." (Để được bền hơn, những chiếc áo khoác này phải nhẹ hơn để các cán bộ và chiến sĩ có thể di chuyển dễ dàng hơn khi làm việc).
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Surprisingly cost was regarded ______ important factor in choosing a new cell phone by the three teenagers.
Peter went out for two hours. When he returned I asked him where _______.
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The press puts ________ on the police forces who were unable to cope with the crowd of savage hooligans.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42
DON'T HANDLE WITH CARE
People always go shopping for the latest and greatest gadgets. Speed, performance, and the latest functions are always key factors before making a purchase. Yet the most important factor of all, which often isn’t considered, is a product’s durability. After all, if a product breaks easily and can’t be repaired, the buyer will have wasted their investment. In other cases, weakly-designed product can cost someone their life. Thankfully, today’s inventors and engineers coming up with some incredible ways to ensure that many products can survive the most difficult situations.
One area where durability is absolutely essential is in designing weaponry. In the industry, lapses in quality can lead to death. Designers of military vehicles have recently made great strides in creating some extra tough bulletproof vehicles. Researchers were inspired by the advances made with a similar technology, bulletproof vests. This equipment, which keeps police officers and soldiers protected from gunfire, has been continually upgraded as time has gone on. In order to get tougher, these vests have got lighter, so officers and soldiers can move more freely while working.
Beautiful screens, a fast computer processor, and the latest software are probably the biggest concerns for most people shopping for new smartphones. Yet, since most mobiles will be subject to their fair share of bumps and bruises during their life cycle, durability should also be a major concern. A major breakthrough in recent years was the invention of Gorilla Glass. This technology not only prevents devices from breaking when dropped on hard surfaces, but it also makes them scratch-resistant as well. Gorilla Glass screens are given molten alkaline salt baths that produce a hard, compressed layer at the surface. Before a screen can crack, it will have to penetrate this rugged surface, which takes a large degree of force.
Recently, another new technique called electrospinning was developed that could make future products even tougher to break. The process involves applying high voltage to a polymer to create a strand of nanofiber. Products designed with the material will be able to absorb more energy without breaking. Researchers are aiming to lighten up aircraft and potentially decrease the damage planes suffer in crashes. Hopefully, these advances are just the beginning. Although science has come a long way in helping manufacturers to create more durable products, the next century should surely bring some even more incredible improvements.
What is the main point of the first paragraph?
Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
Harry displays enthusiasm whenever he is posed with a problem.
John speaks Chinese fluently because he used to live in China for ten years.
Many of these could possibly be avoided by better construction, safety systems, early warning and (29) _______ planning.
Even children who are ______ keen on a particular occupation often know little about it.
The government plans to help poorer countries. It plans to cancel all third world debt.
If I had attended the party last night, I ________ able to go to work today.
I couldn’t believe it when Marcy accused me of ________ in her relationship with Joe.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 25 to 29
An earthquake is the result of a sudden release of energy in the Earth's crust that creates seismic waves. At the Earth's surface, earthquakes are recognized (25) _______ vibration, shaking and sometimes displacement of the ground. The vibrations may vary in (26) _______. They are caused mostly by slippage within geological faults, but also by other events such as volcanic activity, landslides, mine blasts, and nuclear tests. The underground point of (27) _____ of the earthquake is called the focus. The point directly above the focus on the surface is called the epicenter. Earthquakes by themselves rarely kill people or wildlife. It is usually the secondary events (28) _______ they trigger, such as building collapse, fires, tsunamis (seismic sea waves) and volcanoes, that are actually the human disaster. Many of these could possibly be avoided by better construction, safety systems, early warning and (29) _______ planning.
