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  3. The hulls of the deep-sea submersibles of the future will be constructed fro

The hulls of the deep-sea submersibles of the future will be constructed fro

游客2024-01-10  64
问题     The hulls of the deep-sea submersibles of the future will be constructed from glass, not from special steel or aluminum alloys. The reason is that metals have a grainy microscopic structure, which makes metal hulls susceptible to cracking between the grains under deep- sea pressures. Glass hulls are immune to this problem because glass, though a solid in appearance, can be considered a fluid because it flows when under pressure.
    Which of the following can be most reliably inferred from the passage above?
选项 A、Fluids lack grainy microscopic structure.
B、All so-called solids are merely extremely slow-running fluids.
C、The only glass that ever cracks is microscopically grainy.
D、Glass is superior to steel and aluminum as a construction material.
E、Glass hulls have consistently outperformed metal hulls in recent deep-sea operations.
答案 A
解析 A选项和原文结论保持一致，正确。B项本文只是说玻璃这种固体其实是流体，不意味着所有固体都是流体，不选。C项本文没有提到玻璃开裂过。D项本文的讨论范围仅限于潜水器，与建材无关，不选。E项文章没提最近的深海航行，不选。
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