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NEW TPO 5 Which of the following best describes the purpose of the third paragraph?

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Stealth Technology
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Stealth technology is designed to make military assets, like aircraft, ships, and missiles, harder to detect by radar. This goal is achieved by reducing the reflection and emission of radar waves. One method involves using materials that absorb radar waves. Another method shapes the surfaces of these assets to deflect radar waves away from the radar receiver.

The F-117 Nighthawk, developed during the 1970s, was the first operational stealth aircraft. Its angular design made it difficult for radar to detect, though it had limitations. Subsequent advancements led to aircraft like the B-2 Spirit bomber, which features smoother surfaces and radar-absorbing paint. These improvements not only enhanced stealth but also influenced designs of other military vehicles. Stealth technology extends beyond aircraft. Modern naval vessels employ angled surfaces and radar-absorbent coatings to minimize their radar signature. Submarines utilize stealth through hulls that are designed to reduce sonar detection.

Despite its advantages, the complexity and cost of stealth technology limit its availability to only a few countries. Ongoing research aims to improve effectiveness and affordability, potentially expanding its usage in future military applications. However, these advancements also raise concerns about an escalating arms race and the ethical implications of increasingly undetectable weaponry.

5.Which of the following best describes the purpose of the third paragraph?

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正确答案:B

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【题干翻译】下列哪一项最好地描述了第3段的目的? 【定位信息理解】组织结构题。第3段第1句“Despite its advantages, the complexity and cost of stealth technology limit its availability to only a few countries. 尽管具有优势,但隐形技术的复杂性和成本限制它仅在少数几个国家可以使用。”及第3句“However, these advancements also raise concerns about an escalating arms race and the ethical implications of increasingly undetectable weaponry. 然而,这些进步也引起了人们对军备竞赛升级和越来越难以探测的武器的伦理影响的担忧。”都在讲隐形技术带来的弊端。 【选项分析】 (A) 第3段提供了飞机以外隐形技术的例子 —— 未提及 (B) 第3段讨论了推进隐形技术的一些缺点 —— 正确 (C) 第3段认为隐形技术应在不同国家之间共享 —— 未提及 (D) 第3段解释了为什么最近隐形技术的进步是成功的 —— 未提及 正确答案:B

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