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134. Recently implemented “shift-work equations” based on studies of the human sleep cycle have reduced sickness, sleeping on the job, fatigue among shift workers, and have raised production efficiency 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 Correct: C
求问:为什么不能说while having raised? 这样不是更加与前面的have reduced形成并列结构加上并列时态么 |
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