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NEW TPO 8 There are four locations[■] in the passage that indicate where the following sentence could be added. Where would the sentence best fit? Select a location [■] to add the sentence to the passage.

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Structural Mechanics
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Structural mechanics refers to how structures behave under various forces. Engineers use principles from this field to design buildings, bridges, and other items to ensure they can withstand loads and stresses. For example, when designing a suspension bridge, engineers need to know the weight of vehicles that cross it (live load) and the bridge's own weight (dead load). They must also calculate how earthquakes and high winds may affect the bridge.

Recently developed "smart" materials change their properties in response to external stimuli, such as temperature, light, or electrical fields. Shape-memory alloys (SMA) can "remember" their original shape. After being deformed at a lower temperature, some SMAs can return to their original shape upon heating. Applications for this technology include orthodontic wires and stents for medical purposes and wing flaps and jet engine components in aerospace. [■]

Experts in structural mechanics use computer simulations to identify potential weaknesses and optimize designs for safety and performance. [■]Nevertheless, predicting the long-term behavior of structures under real-world conditions remains a challenge. [■]Environmentally sustainable design is also taking on greater importance. Engineers increasingly use eco-friendly materials and design structures to minimize energy consumption. [■]

5.There are four locations[■] in the passage that indicate where the following sentence could be added. Where would the sentence best fit? Select a location [■] to add the sentence to the passage.

This approach helps reduce environmental impact and lowers costs over the structure's lifetime..

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该题为句子插入题,询问文章中有四个位置(■),以下句子应添加到哪个位置最合适? 解题思路:此题需要分析待插入句子的内容,匹配原文中逻辑衔接最紧密的位置(通常是同一话题的上下文)。 待插入句是:This approach helps reduce environmental impact and lowers costs over the structure's lifetime.(这种做法有助于减少环境影响,并降低结构整个使用寿命期间的成本。) 文中只有后半部分提到一种明确的“做法”:“Engineers increasingly use eco-friendly materials and design structures to minimize energy consumption.”意思是“工程师越来越多地使用环保材料,并设计能够减少能源消耗的结构。”因此,待插入句子应放在第四个■处,前后文皆围绕“使用环保材料”带来的益处展开,插入后补充了这种做法的具体影响。

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