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我最近复习SC看到两个平行结构的题目有的地方不懂,望NN们赐教赐教。。 Q1. Recently implemented, "shift-work equations" based on studies of the human sleep cycle have reduced sickness, sleeping on job, fatigue among shift workers, and have raised production effeiciency in various industries. A. fatigue among shift workers, and have raised B. fatigue among shift workers, and raised C.and fatigue among shift workers, while raising D. lowered fatigue among shift workers, and raised E. and fatigue among shift workers was lowered while raising.
我的思路是这样的, sickness, sleeping on job, fatigue among shift workers 是小并列,于是乎 fatigue 前面要加上and.于是A,B,D排除掉。and have raised 和之前的have reduced 平行。那么选项中没有and have raised..只有 while raising..这个point特别的不懂。 是while+v-ing 也能表示并列平行么?为什么用while来引平行结构呀? 谢谢大家!! |
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