2. 外语
  3. Each stage of malleability allows the glass to be manipulated into various forms, by different techniques, and if suddenly______

Each stage of malleability allows the glass to be manipulated into various forms, by different techniques, and if suddenly______

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问题 Each stage of malleability allows the glass to be manipulated into various forms, by different techniques, and if suddenly______the object retains the shape______at that point. Glass is thus amenable to a greater number of heat-forming techniques than most other materials.
选项 A、cooling, achieving
B、cooled, achieved
C、cooled, achieving
D、cooling, achieved
答案B
解析 句意是，玻璃在其韧性的每个阶段都可以采用不同的技术形成各种各样的样式，如突然冷却，物体就会保持那个时段达到的形状。因此，与其他大多数材料相比，玻璃适用于更多的热成型技术。If引导条件状语从句，cool的主语是玻璃，故用被动语态，achieved是过去分词修饰前面的shape，所以正确答案为B。
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