2. 外语
  3. The effect of doubling the width of a beam,_____is to double the load that can be sustained.

The effect of doubling the width of a beam,_____is to double the load that can be sustained.

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问题 The effect of doubling the width of a beam,_____is to double the load that can be sustained.
选项 A、other factors remain constant
B、other factors remained constant
C、the other factor being constant
D、other factors remaining constant
答案D
解析 语法类试题(分词)。other factors remaining constant是分词独立主格结构，在句中作伴随情况状语。A、B两项都是完整的句子，虽然在意思上讲得通，但从结构上无法与句中其他成分相连接，即没有关联词作连接手段；C项虽然从结构上可以接受，但在意义上being用得不够准确。
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